tag defines the title displayed in browser tabs and search engine results. It is one of the most important on-page SEO elements. Best practice: keep it between 50-60 characters, include your primary keyword near the beginning, and make it unique and descriptive for each page. Titles that are too long get truncated in search results."},{"title":"Meta Description","content":"The meta description provides a brief summary of the page content and appears below the title in search results (SERP snippets). While not a direct ranking factor, a compelling description improves click-through rates. Aim for 150-160 characters. Include your primary keyword naturally and end with a call to action when appropriate."},{"title":"Open Graph Tags","content":"Open Graph meta tags (og:title, og:description, og:image, og:url) control how your page is displayed when shared on social media platforms like Facebook, LinkedIn, and Slack. Without these tags, social platforms use arbitrary content from the page. The og:image should be at least 1200×630 pixels for best results across all platforms."},{"title":"Twitter Card Tags","content":"Twitter Card meta tags (twitter:card, twitter:title, twitter:description, twitter:image) control tweet previews when your URL is shared on Twitter. The 'summary_large_image' card type provides a large image preview that attracts more engagement. Without Twitter Card tags, Twitter falls back to Open Graph tags, but dedicated Twitter tags give you more control."}],"featuresTitle":"Key Features","features":["Parses and categorizes all meta tags: basic, Open Graph, Twitter, and others","Checks title and description length against SEO best practices","Detects missing critical tags like og:image or twitter:card","Provides actionable optimization suggestions for each issue found"],"applicationsTitle":"Common Applications","applications":["Auditing a page's meta tags before and after optimization","Verifying Open Graph tags are correctly implemented for social sharing","Checking competitor pages to understand their meta tag strategy","Troubleshooting why a page looks wrong when shared on social media"]}},"seo-metaTagsGenerator":{"title":"Meta Tags Generator","description":"Generate complete HTML meta tags code for your web page","pageTitle":"Page Title","pageTitlePlaceholder":"Enter your page title (50-60 chars recommended)","description_field":"Meta Description","descriptionPlaceholder":"Enter your meta description (150-160 chars recommended)","keywords":"Keywords","keywordsPlaceholder":"keyword1, keyword2, keyword3","author":"Author","authorPlaceholder":"Author name or company name","robots":"Robots","viewport":"Viewport","charset":"Charset","generateButton":"Generate Meta Tags","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","charCount":"chars","guide":{"title":"How to Use","items":["Fill in the Page Title field with your page's title (50-60 characters is optimal).","Write a compelling meta description (150-160 characters) that summarizes your page content.","Add relevant keywords separated by commas (optional — modern SEO relies less on meta keywords).","Set the robots directive: 'index, follow' allows search engines to index and follow links.","Click 'Generate Meta Tags' to create the HTML code, then copy and paste it into your page's <head> section."]},"knowledge":{"title":"About Meta Tags Generation","items":[{"title":"Viewport Meta Tag","content":"The viewport meta tag (<meta name='viewport' content='width=device-width, initial-scale=1'>) is essential for mobile-friendly pages. It tells browsers how to control the page's dimensions and scaling. Without it, mobile browsers render the page at a desktop width and then scale it down, resulting in a poor mobile experience and lower rankings in mobile search."},{"title":"Robots Meta Tag","content":"The robots meta tag controls how search engines crawl and index your page. Common values include: 'index, follow' (default — allows indexing and following links), 'noindex, follow' (don't index this page but follow links), 'noindex, nofollow' (block everything — for private pages), and 'noarchive' (don't show cached version in search results)."},{"title":"Charset Declaration","content":"The charset meta tag (<meta charset='UTF-8'>) declares the character encoding for the HTML document. UTF-8 is the universal encoding that supports virtually all characters from all languages and is the recommended charset for all modern websites. It should be the first tag in the <head> section so browsers interpret the document correctly from the start."},{"title":"Meta Keywords Tag","content":"The meta keywords tag was historically used to tell search engines what keywords the page is about. However, Google stopped using it as a ranking signal in 2009 because of widespread abuse (keyword stuffing). Most modern SEO strategies focus on title, description, and actual page content instead. Including meta keywords is harmless but provides no ranking benefit in Google."}],"featuresTitle":"Key Features","features":["Generates all essential meta tags: charset, viewport, title, description, keywords, author, robots","Character counter for title and description to ensure optimal length","One-click copy for the generated HTML code","Configurable robots and viewport options"],"applicationsTitle":"Common Applications","applications":["Setting up meta tags for a new web page from scratch","Standardizing meta tags across multiple pages of a website","Learning which meta tags are needed for a modern, SEO-friendly page","Quickly generating meta tag templates for CMS or framework integration"]}},"seo-mobileFriendly":{"title":"Mobile Friendly Checker","description":"Check HTML code for mobile-friendliness and get optimization recommendations","inputLabel":"Paste HTML Code","inputPlaceholder":"Paste your page's HTML source code here...","checkButton":"Check Mobile Friendliness","clearButton":"Clear","resultsTitle":"Mobile Friendliness Results","scoreLabel":"Mobile Score","checkItems":{"viewport":"Viewport Meta Tag","fontSizes":"Font Sizes","tapTargets":"Tap Target Sizes","flash":"No Flash/Plugins","mediaQueries":"Responsive Media Queries","textSize":"Readable Text Size"},"status":{"pass":"Pass","warning":"Warning","fail":"Fail"},"noInput":"Paste HTML code and click Check Mobile Friendliness.","guide":{"title":"How to Use","items":["View the source code of your web page (right-click → View Page Source) and copy all the HTML.","Paste the HTML into the text area above.","Click 'Check Mobile Friendliness' to run all mobile compatibility checks.","Review the score and the individual check results — green passes, yellow warnings, red failures.","Follow the recommendations for each failed or warned check to improve mobile-friendliness."]},"knowledge":{"title":"About Mobile-Friendly SEO","items":[{"title":"Mobile-First Indexing","content":"Since 2019, Google uses mobile-first indexing for all new websites, meaning it primarily crawls and indexes the mobile version of your content for ranking. Websites that are not mobile-friendly receive lower rankings in both mobile and desktop search results. With over 60% of global web traffic coming from mobile devices, mobile optimization is essential for SEO success and user engagement."},{"title":"Viewport Meta Tag","content":"The viewport meta tag (<meta name='viewport' content='width=device-width, initial-scale=1'>) is the single most critical element for mobile compatibility. Without it, mobile browsers render the page at desktop width (~980px) and then scale it down, resulting in tiny text and elements. The 'width=device-width' value sets the viewport to the device's screen width, and 'initial-scale=1' prevents initial zoom. This tag is required for Google to consider a page mobile-friendly."},{"title":"Tap Target Sizes","content":"Google recommends that all tappable elements (buttons, links, form inputs) should be at least 48×48 CSS pixels in size and have at least 8px of padding between adjacent targets to prevent accidental taps. Small tap targets are a major source of mobile usability issues. If links or buttons are too small or too close together, users must zoom in to tap accurately, leading to frustration and high bounce rates."},{"title":"Responsive Design Techniques","content":"Responsive design uses CSS media queries to adapt layout and content to different screen sizes. Key techniques include: flexible grids (using percentages instead of fixed pixels), flexible images (max-width: 100%), media queries to apply different styles at breakpoints, avoiding fixed-width elements wider than the viewport, and using relative units (em, rem, vw, vh) instead of absolute pixels for font sizes and spacing."}],"featuresTitle":"Key Features","features":["Checks for viewport meta tag presence and correct configuration","Detects small font sizes that may require zooming to read on mobile","Identifies Flash/plugin usage that doesn't work on modern mobile devices","Checks for responsive CSS media queries that indicate responsive design"],"applicationsTitle":"Common Applications","applications":["Auditing existing pages for mobile-friendliness issues before Google indexing","Checking third-party page templates and themes for mobile compatibility","Diagnosing why a page fails Google's Mobile-Friendly Test","Training developers on mobile SEO requirements and best practices"]}},"seo-ogTagsGenerator":{"title":"Open Graph Tags Generator","description":"Generate Open Graph meta tags for social media sharing with live preview","ogTitle":"og:title","ogTitlePlaceholder":"Page title for social media","ogDescription":"og:description","ogDescriptionPlaceholder":"Page description for social media (150-160 chars)","ogImage":"og:image","ogImagePlaceholder":"https://example.com/image.jpg (1200x630px recommended)","ogUrl":"og:url","ogUrlPlaceholder":"https://example.com/page","ogType":"og:type","ogSiteName":"og:site_name","ogSiteNamePlaceholder":"Your Site Name","ogLocale":"og:locale","generateButton":"Generate OG Tags","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","previewTitle":"Social Media Preview","previewImageAlt":"Preview image","guide":{"title":"How to Use","items":["Fill in og:title with the title you want shown when shared on social media (can differ from page title).","Write an og:description that grabs attention — it appears as the excerpt under the title in social previews.","Add an og:image URL pointing to an image at least 1200×630 pixels for best display quality.","Enter the canonical og:url for this page (use the full URL including https://).","Click 'Generate OG Tags' to create the code, check the social media preview, then copy into your HTML <head>."]},"knowledge":{"title":"About Open Graph Protocol","items":[{"title":"What is Open Graph?","content":"Open Graph (OG) is a protocol created by Facebook in 2010 that enables any web page to become a rich object in a social graph. By adding OG meta tags, you control how your content appears when shared on Facebook, LinkedIn, Slack, Discord, WhatsApp, and many other platforms. Without OG tags, these platforms scrape arbitrary content from your page, often with poor results."},{"title":"og:image Best Practices","content":"The og:image tag specifies the image shown in the social share preview card. Best practices: use at least 1200×630 pixels for high-resolution displays, keep file size under 8MB, use JPG or PNG format, avoid text-heavy images since they get cropped on mobile. Facebook caches images heavily — use a unique URL when updating an image to force a cache refresh."},{"title":"og:type Values","content":"The og:type tag describes the type of content. Common values include: 'website' (default, for general web pages), 'article' (for blog posts and news), 'product' (for e-commerce), 'video.movie' or 'video.episode' (for video content), and 'music.song' or 'music.album' (for music). Some platforms like Facebook render richer previews for specific content types."},{"title":"og:locale and Multilingual","content":"The og:locale tag specifies the language and territory of your content using IETF language tags (e.g., 'en_US', 'zh_CN', 'es_ES'). For multilingual sites, you can use og:locale:alternate to list alternative language versions. This helps social platforms serve the correct language version and improves the sharing experience for international audiences."}],"featuresTitle":"Key Features","features":["Generates all essential OG tags: title, description, image, url, type, site_name, locale","Live social media preview card showing how the content will appear when shared","One-click copy of the complete generated HTML code","Supports all og:type values with a dropdown selector"],"applicationsTitle":"Common Applications","applications":["Optimizing how blog posts and articles appear when shared on social media","Creating custom share previews for product pages in e-commerce","Ensuring brand consistency across all social media sharing","Debugging why a page's share preview shows incorrect content"]}},"seo-robotsTxtTester":{"title":"Robots.txt Tester","description":"Test robots.txt rules to see if a crawler can access a specific URL","robotsLabel":"Robots.txt Content","robotsPlaceholder":"User-agent: *\nDisallow: /private/\nAllow: /public/\n\nUser-agent: Googlebot\nDisallow: /no-google/","userAgentLabel":"User-Agent to Test","userAgentPlaceholder":"Googlebot","testUrlLabel":"URL to Test","testUrlPlaceholder":"https://example.com/some/path","testButton":"Test","resultTitle":"Test Result","allowed":"Allowed","disallowed":"Disallowed","matchedRule":"Matched Rule","noMatch":"No matching rule (default: allowed)","guide":{"title":"How to Use","items":["Paste your robots.txt content into the first text area.","Enter the user-agent name you want to test (e.g., 'Googlebot', 'Bingbot', '*' for all).","Enter the full URL you want to test for crawler access.","Click 'Test' to see if the specified crawler is allowed or blocked from the URL.","The result shows the access decision (Allowed/Disallowed) and the specific rule that matched."]},"knowledge":{"title":"About Robots.txt","items":[{"title":"How Robots.txt Works","content":"The robots.txt file is a standard used by websites to communicate with web crawlers about which pages should not be crawled or indexed. It must be placed in the root directory of your website (e.g., https://example.com/robots.txt). Each section starts with 'User-agent:' followed by rules. The wildcard '*' applies to all crawlers. Crawlers check this file before crawling any page on your site."},{"title":"Allow vs Disallow Rules","content":"Disallow rules block crawlers from accessing matching paths. Allow rules explicitly permit access, overriding more general Disallow rules. When multiple rules match a URL, the most specific rule (longest match) wins. For example, 'Disallow: /private/' blocks all paths starting with /private/, but 'Allow: /private/public.html' would allow that specific page even if the parent directory is disallowed."},{"title":"Common Robots.txt Patterns","content":"Common robots.txt patterns include: blocking all crawlers ('User-agent: * / Disallow: /'), blocking only Googlebot ('User-agent: Googlebot / Disallow: /'), blocking specific directories ('Disallow: /admin/'), blocking URL parameters ('Disallow: /*?*'), and including a Sitemap directive ('Sitemap: https://example.com/sitemap.xml'). The Sitemap directive helps search engines find your sitemap automatically."},{"title":"Robots.txt Limitations","content":"Robots.txt prevents crawling but does NOT prevent indexing. A page can be indexed even if blocked in robots.txt if other pages link to it. To prevent indexing, use the 'noindex' meta tag or X-Robots-Tag HTTP header instead. Also note that robots.txt is a voluntary standard — malicious bots may ignore it. Never use robots.txt to hide sensitive content; use proper authentication instead."}],"featuresTitle":"Key Features","features":["Parses robots.txt rules for any user-agent including wildcards","Tests specific URL paths against Allow and Disallow directives","Shows the matched rule that determined the access decision","Handles rule precedence: most specific (longest) rule wins"],"applicationsTitle":"Common Applications","applications":["Verifying that Googlebot can access important pages after updating robots.txt","Debugging why certain pages are not being indexed by search engines","Testing robots.txt rules before deploying changes to production","Confirming that sensitive directories are properly blocked from all crawlers"]}},"seo-schemaGenerator":{"title":"JSON-LD Schema Generator","description":"Generate JSON-LD structured data markup for rich search results","schemaType":"Schema Type","schemaTypes":{"Article":"Article","WebPage":"Web Page","Product":"Product","Organization":"Organization","Person":"Person","FAQ":"FAQ","BreadcrumbList":"Breadcrumb List"},"generateButton":"Generate Schema","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated JSON-LD Code","addFaqItem":"Add FAQ Item","addBreadcrumb":"Add Breadcrumb","removeFaqItem":"Remove","question":"Question","answer":"Answer","name":"Name","url":"URL","articleFields":{"headline":"Headline","author":"Author Name","datePublished":"Date Published","dateModified":"Date Modified","description":"Description","image":"Image URL","publisher":"Publisher Name","publisherLogo":"Publisher Logo URL"},"productFields":{"name":"Product Name","description":"Description","image":"Image URL","brand":"Brand Name","sku":"SKU","price":"Price","currency":"Currency","availability":"Availability","ratingValue":"Rating Value","reviewCount":"Review Count"},"organizationFields":{"name":"Organization Name","url":"Website URL","logo":"Logo URL","description":"Description","telephone":"Telephone","email":"Email","address":"Street Address","city":"City","country":"Country"},"personFields":{"name":"Full Name","url":"Profile URL","image":"Photo URL","jobTitle":"Job Title","email":"Email","description":"Bio / Description"},"guide":{"title":"How to Use","items":["Select the Schema type that best matches your page content (Article for blog posts, Product for shop pages, etc.).","Fill in the form fields — required fields should be completed for valid schema markup.","Click 'Generate Schema' to create the JSON-LD code.","Copy the generated code and paste it into your page's HTML, inside a <script type='application/ld+json'> tag.","Use Google's Rich Results Test (search.google.com/test/rich-results) to validate your schema markup."]},"knowledge":{"title":"About Structured Data / Schema.org","items":[{"title":"What is JSON-LD?","content":"JSON-LD (JavaScript Object Notation for Linked Data) is the recommended format by Google for adding structured data to web pages. It uses a <script type='application/ld+json'> tag in the HTML head or body, keeping the markup separate from the visible content. This makes it easier to maintain than inline Microdata or RDFa formats. Google's official documentation recommends JSON-LD as the preferred structured data format."},{"title":"Rich Results from Schema","content":"Structured data markup can enable rich results (also called rich snippets) in Google Search. These enhanced listings include: star ratings and review counts for products, FAQ dropdowns, recipe details (cooking time, calories), event information (date, location), how-to steps, and more. Rich results significantly increase visibility and click-through rates compared to standard blue link results."},{"title":"FAQ Schema","content":"FAQ (Frequently Asked Questions) schema is one of the most accessible rich result types that directly shows question-and-answer pairs in Google search results as expandable dropdowns. This can double or triple the SERP real estate your result occupies. Use FAQ schema on pages that genuinely answer common questions. Google limits FAQ rich results to authoritative sites and may not show them for all pages."},{"title":"Schema Validation","content":"After adding schema markup, always validate it using Google's Rich Results Test (search.google.com/test/rich-results) or Schema.org's validator (validator.schema.org). Common validation errors include: missing required properties (like 'name' for Organization), incorrect date formats (must be ISO 8601: YYYY-MM-DD), invalid price values, and using non-standard property names. Fix all errors before deployment to ensure eligibility for rich results."}],"featuresTitle":"Key Features","features":["Supports 7 schema types: Article, WebPage, Product, Organization, Person, FAQ, BreadcrumbList","Dynamic form fields that change based on selected schema type","Generates valid JSON-LD wrapped in the correct <script> tag","One-click copy for immediate use in any HTML page"],"applicationsTitle":"Common Applications","applications":["Adding Article schema to blog posts for enhanced search appearances","Setting up Product schema for e-commerce pages to show price and ratings","Adding FAQ schema to support pages to enable expandable questions in SERP","Creating Organization schema for the homepage to establish brand information"]}},"seo-serpPreview":{"title":"SERP Preview Tool","description":"Preview how your page appears in Google search results","urlLabel":"Page URL","urlPlaceholder":"https://example.com/your-page","titleLabel":"Page Title","titlePlaceholder":"Enter your page title...","descriptionLabel":"Meta Description","descriptionPlaceholder":"Enter your meta description...","previewTitle":"Google Search Preview","charCount":"characters","titleStatus":{"tooShort":"Too short (aim for 50-60 chars)","good":"Good length","tooLong":"Too long (will be truncated)"},"descStatus":{"tooShort":"Too short (aim for 150-160 chars)","good":"Good length","tooLong":"Too long (will be truncated)"},"suggestions":"Optimization Tips","guide":{"title":"How to Use","items":["Enter the full URL of your page (including https://).","Type or paste your page title in the Title field — watch the character counter.","Enter your meta description — aim for 150-160 characters for optimal display.","The preview below updates in real-time to show how your result looks in Google.","Review the optimization tips and adjust your title and description until both show 'Good length'."]},"knowledge":{"title":"About SERP Optimization","items":[{"title":"Optimal Title Length","content":"Google typically displays 50-60 characters of a page title in search results. Titles longer than ~60 characters get truncated with '...' at the end. Place your most important keyword near the beginning of the title and include your brand name at the end separated by a dash or pipe character. A well-crafted title directly influences click-through rates and is one of the most impactful on-page SEO elements."},{"title":"Meta Description Best Practices","content":"While meta descriptions are not a direct Google ranking factor, they significantly impact click-through rates from search results. Google displays approximately 150-160 characters for most queries (fewer on mobile). Write descriptions that accurately summarize the page content, include the target keyword naturally, and end with a compelling call to action. Google may override your description with page content if it deems another snippet more relevant."},{"title":"URL Structure in SERP","content":"Google displays the breadcrumb path of the URL below the title. Clean, readable URLs improve click-through rates and help users understand page context. Best practices: use lowercase letters, separate words with hyphens (not underscores), keep URLs short, include the target keyword in the URL slug, and avoid unnecessary parameters. A URL like /seo/keyword-density is far better than /page?id=123."},{"title":"Rich Results and Schema","content":"Beyond standard SERP listings, structured data (Schema.org markup) can earn rich results like star ratings, FAQ dropdowns, recipe details, and event dates that appear directly in search results. Rich results occupy more space on the SERP and typically receive higher click-through rates. Use the Schema Generator tool to add structured data markup to your pages for eligibility."}],"featuresTitle":"Key Features","features":["Real-time Google SERP preview showing title, URL breadcrumb, and description","Character counters with color-coded status indicators for title and description","Optimization tips based on Google's recommended length guidelines","Shows exactly how truncation affects your title and description"],"applicationsTitle":"Common Applications","applications":["Testing title and description variations before publishing a page","Auditing existing pages to identify truncation issues","Training content writers on SEO title and description best practices","A/B testing different meta descriptions for improved click-through rates"]}},"seo-sitemapGenerator":{"title":"XML Sitemap Generator","description":"Generate standard XML sitemap files from a list of URLs","urlsLabel":"URLs (one per line)","urlsPlaceholder":"https://example.com/\nhttps://example.com/about\nhttps://example.com/contact","changefreqLabel":"Change Frequency","changefreqOptions":{"always":"Always","hourly":"Hourly","daily":"Daily","weekly":"Weekly","monthly":"Monthly","yearly":"Yearly","never":"Never"},"priorityLabel":"Priority","lastmodLabel":"Include Last Modified Date","lastmodDateLabel":"Last Modified Date","generateButton":"Generate Sitemap","copyButton":"Copy XML","copiedButton":"Copied!","downloadButton":"Download sitemap.xml","outputLabel":"Generated sitemap.xml","urlCount":"URLs","guide":{"title":"How to Use","items":["Enter all your website URLs in the text area, one URL per line (include the full URL with https://).","Select the default change frequency (how often the content changes) — this is a hint to search engines.","Set the default priority (0.1 to 1.0) — higher means more important; 0.5 is the default for most pages.","Toggle 'Include Last Modified Date' to add today's date as the lastmod for all URLs.","Click 'Generate Sitemap' to create the XML, then copy or download the sitemap.xml file and upload it to your website root."]},"knowledge":{"title":"About XML Sitemaps","items":[{"title":"What is a Sitemap?","content":"A sitemap is an XML file that lists the pages of your website to tell search engines about the pages available for crawling. Sitemaps help search engines discover all your content, especially pages that may not be easily found through internal links. The standard sitemap protocol is defined at sitemaps.org and is supported by Google, Bing, Yahoo, and other search engines."},{"title":"Priority and changefreq Explained","content":"The <priority> tag (0.1 to 1.0) tells search engines the relative importance of pages within your site — it doesn't affect how your pages rank relative to other sites. The <changefreq> tag is a hint about how often a page is updated. Both values are advisory — Google may not strictly follow them. Focus on accurate priority values for important pages like your homepage (1.0) and key landing pages (0.8)."},{"title":"Sitemap Size Limits","content":"A single XML sitemap can contain a maximum of 50,000 URLs and must not exceed 50MB uncompressed (10MB compressed). If your site has more pages, you need to create multiple sitemaps and reference them from a sitemap index file. Most websites with under 50,000 pages only need one sitemap file. After generating and uploading your sitemap, submit it via Google Search Console."},{"title":"Sitemap Index Files","content":"For large websites with many URLs, you can create a sitemap index file that points to multiple individual sitemap files. The sitemap index follows the same XML format but uses <sitemapindex> as the root element with <sitemap> child elements, each containing a <loc> (sitemap URL) and optional <lastmod>. Submit only the sitemap index URL to Google Search Console — it will automatically process all referenced sitemaps."}],"featuresTitle":"Key Features","features":["Generates valid XML sitemap with proper namespace declarations","Configurable changefreq and priority for all URLs","Optional lastmod date for last-modified tracking","Download as sitemap.xml file or copy the XML code"],"applicationsTitle":"Common Applications","applications":["Creating a sitemap for a new website before first Google Search Console submission","Regenerating the sitemap after adding new pages to a website","Creating sitemaps for static sites that don't have automatic sitemap generation","Testing sitemap XML format before uploading to the server"]}},"seo-sitemapValidator":{"title":"XML Sitemap Validator","description":"Validate your XML sitemap format, check URL counts, and list all URLs","inputLabel":"Paste Sitemap XML Content","inputPlaceholder":"Paste your sitemap.xml content here...","validateButton":"Validate","clearButton":"Clear","resultsTitle":"Validation Results","urlListTitle":"URLs Found","status":{"valid":"Valid","invalid":"Invalid","warnings":"Valid with Warnings"},"stats":{"urlCount":"URL Count","hasNamespace":"Namespace","hasLastmod":"Has lastmod","hasPriority":"Has priority","hasChangefreq":"Has changefreq"},"errors":"Errors","warnings":"Warnings","noInput":"Paste sitemap XML content and click Validate.","guide":{"title":"How to Use","items":["Download your sitemap.xml file or copy its content from your web server.","Paste the complete XML content into the text area above.","Click 'Validate' to check the sitemap format, namespace, and URL structure.","Review any errors (must fix) or warnings (recommended to fix) in the results.","The URL list shows all discovered URLs — verify that all important pages are included."]},"knowledge":{"title":"About Sitemap Validation","items":[{"title":"Required Sitemap Elements","content":"A valid XML sitemap must have: the XML declaration (<?xml version='1.0' encoding='UTF-8'?>), the <urlset> root element with the correct xmlns namespace (http://www.sitemaps.org/schemas/sitemap/0.9), and at least one <url> element containing a <loc> tag with a valid absolute URL. All other elements (<lastmod>, <changefreq>, <priority>) are optional but should be properly formatted if present."},{"title":"Common Sitemap Errors","content":"The most common sitemap errors include: missing or incorrect XML namespace declaration, relative URLs in <loc> tags (must be absolute with https://), invalid date format in <lastmod> (must be W3C Datetime like YYYY-MM-DD), priority values outside the 0.0-1.0 range, invalid changefreq values (must be one of: always, hourly, daily, weekly, monthly, yearly, never), and exceeding the 50,000 URL limit per sitemap file."},{"title":"Sitemap Testing Tools","content":"After validating your sitemap locally, submit it to Google Search Console for indexing insights. Google Search Console's Coverage report shows how many URLs from your sitemap are indexed vs. excluded. You can also view sitemap processing status and errors. For Bing, use Bing Webmaster Tools. Always re-submit your sitemap after major website updates to ensure search engines index your new content promptly."},{"title":"Image and Video Sitemaps","content":"Standard sitemaps can be extended with specialized namespaces for images and videos. Image sitemaps use the namespace xmlns:image='http://www.google.com/schemas/sitemap-image/1.1' and <image:image> elements. Video sitemaps use xmlns:video='http://www.google.com/schemas/sitemap-video/1.1'. These extensions help Google better understand rich media content and can improve image and video search visibility."}],"featuresTitle":"Key Features","features":["Validates XML format, namespace declarations, and required elements","Checks URL format validity and ensures all URLs are absolute","Verifies 50,000 URL limit and other sitemap constraints","Lists all discovered URLs for easy verification"],"applicationsTitle":"Common Applications","applications":["Verifying a newly created sitemap before submitting to Google Search Console","Troubleshooting why Google Search Console shows sitemap errors","Auditing a sitemap from an automated generator for quality assurance","Checking that all important pages are included in the sitemap"]}},"seo-titleGenerator":{"title":"SEO Title Generator","description":"Generate multiple SEO-optimized title suggestions using keywords and templates","primaryKeyword":"Primary Keyword","primaryKeywordPlaceholder":"e.g., keyword density","secondaryKeyword":"Secondary Keyword (optional)","secondaryKeywordPlaceholder":"e.g., SEO analysis","brandName":"Brand Name (optional)","brandNamePlaceholder":"e.g., MyTool","generateButton":"Generate Titles","clearButton":"Clear","resultsTitle":"Title Suggestions","charCount":"chars","copyTip":"Click to copy","noResults":"Enter a primary keyword and click Generate Titles.","guide":{"title":"How to Use","items":["Enter your primary keyword — the main topic or term you want the page to rank for.","Optionally add a secondary keyword to diversify the title variations generated.","Enter your brand name if you want it included in some title templates.","Click 'Generate Titles' to get multiple title suggestions based on proven SEO templates.","Review the character count for each suggestion — aim for 50-60 characters, and click any title to copy it."]},"knowledge":{"title":"About SEO Title Optimization","items":[{"title":"Title Tag Impact on Rankings","content":"The HTML title tag is one of the most important on-page SEO factors. Search engines use it to understand the primary topic of a page. Including your target keyword near the beginning of the title increases relevance signals. Google rewrites titles in about 61% of cases when it determines a better title exists, so well-crafted titles that closely match page content are more likely to be preserved."},{"title":"Click-Through Rate Optimization","content":"A great title isn't just for rankings — it's also a primary driver of click-through rates (CTR) from search results. Titles with numbers (e.g., '10 Best...'), power words (Ultimate, Complete, Free, Easy), questions (How to...?), and clear value propositions tend to attract more clicks. Higher CTR also sends positive signals to search engines about the relevance and quality of your page."},{"title":"Title Templates That Work","content":"Proven SEO title templates include: '[Keyword] - [Brand]' (simple and clean), 'How to [Keyword]: A Complete Guide', '[Number] Best [Keyword] Tools/Tips', '[Keyword]: Everything You Need to Know', 'The Ultimate [Keyword] Guide for [Year]', and '[Keyword] vs [Alternative]: Which is Better?'. Each template serves different search intents and can attract different types of searchers."},{"title":"Avoiding Duplicate Titles","content":"Every page on your website should have a unique title tag. Duplicate titles confuse search engines about which page to rank for a given query, leading to keyword cannibalization. Use site:yoursite.com in Google Search to check for duplicate titles, or use a site crawling tool. For e-commerce sites with thousands of product pages, use dynamic title generation based on product attributes like brand, model, and category."}],"featuresTitle":"Key Features","features":["Generates 10+ title variations using proven SEO title templates","Shows character count with color-coded indicators for optimal length","Click-to-copy functionality for each generated title","Combines primary keyword, secondary keyword, and brand name in variations"],"applicationsTitle":"Common Applications","applications":["Brainstorming title options for new blog posts and landing pages","A/B testing different title formats for higher click-through rates","Refreshing old page titles to improve search performance","Training content writers on effective SEO title writing"]}},"seo-twitterCardGenerator":{"title":"Twitter Card Generator","description":"Generate Twitter Card meta tags to control how your content appears on Twitter","cardType":"Card Type","cardTypes":{"summary":"Summary","summary_large_image":"Summary Large Image","app":"App","player":"Player"},"twitterTitle":"twitter:title","twitterTitlePlaceholder":"Title for Twitter (max 70 chars)","twitterDescription":"twitter:description","twitterDescriptionPlaceholder":"Description for Twitter (max 200 chars)","twitterImage":"twitter:image","twitterImagePlaceholder":"https://example.com/twitter-image.jpg","twitterSite":"twitter:site","twitterSitePlaceholder":"@yourtwitterhandle","twitterCreator":"twitter:creator","twitterCreatorPlaceholder":"@contentcreator","generateButton":"Generate Twitter Card","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","previewTitle":"Twitter Card Preview","guide":{"title":"How to Use","items":["Select the Card Type: 'Summary Large Image' is recommended for articles with compelling visuals.","Enter the twitter:title (max 70 characters) and twitter:description (max 200 characters).","Add the twitter:image URL — images should be at least 800×418 pixels for summary_large_image.","Add your twitter:site handle (your website's Twitter account) and twitter:creator (content author).","Click 'Generate Twitter Card' to create the code, then paste it into your HTML <head> section."]},"knowledge":{"title":"About Twitter Cards","items":[{"title":"Twitter Card Types Explained","content":"Twitter supports four card types: Summary (small square thumbnail with title and description — default for most pages), Summary Large Image (full-width rectangular image — best for articles and blog posts), App (designed to promote mobile apps with install links), and Player (embeds video or audio players directly in tweets). Summary Large Image cards get significantly more engagement than basic Summary cards."},{"title":"twitter:image Requirements","content":"For Summary cards, images should be at least 144×144 pixels with a 1:1 aspect ratio. For Summary Large Image cards, use at least 800×418 pixels with a 2:1 aspect ratio. Maximum file size is 5MB. Supported formats: JPG, PNG, WEBP, and GIF. Twitter fetches images and creates its own cached version — use Twitter Card Validator to preview how your card looks before publishing."},{"title":"twitter:site vs twitter:creator","content":"twitter:site is the Twitter @username of the website publishing the content (e.g., @YourCompany). twitter:creator is the @username of the content creator or author (e.g., @AuthorName). For multi-author publications, twitter:creator changes per article while twitter:site stays constant. Both fields help Twitter attribute content properly and can improve discoverability."},{"title":"Fallback to Open Graph","content":"If Twitter Card tags are not present, Twitter automatically uses Open Graph (og:) tags as a fallback. However, explicitly setting Twitter Card tags gives you more control over the card appearance. For example, twitter:image:alt lets you add alt text to the card image for accessibility. Using both Twitter Card and Open Graph tags is the recommended approach for maximum compatibility."}],"featuresTitle":"Key Features","features":["Supports all four Twitter Card types: summary, summary_large_image, app, player","Live preview showing how the card will look on Twitter","Character counters for title (70) and description (200) limits","Generates both twitter: meta tags and falls back gracefully to og: tags"],"applicationsTitle":"Common Applications","applications":["Optimizing article and blog post sharing on Twitter for maximum engagement","Setting up Twitter Cards for e-commerce product pages","Promoting mobile apps with Twitter App Cards","Ensuring brand assets and messaging display correctly in Twitter shares"]}},"shiftJisEncoder":{"convert":{"title":"Shift-JIS Encoding Converter","input":"Input","output":"Output","sjisToUtf8":"Shift-JIS → UTF-8","utf8ToSjis":"UTF-8 → Shift-JIS","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter Shift-JIS encoded hex data...","textInputPlaceholder":"Enter Japanese text to convert...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["Shift-JIS to UTF-8: Enter hex data","UTF-8 to Shift-JIS: Enter Japanese text","Supports Japanese Kana and Kanji conversion"]},"knowledge":{"title":"Shift-JIS Knowledge","items":[{"title":"What is Shift-JIS?","content":"Shift-JIS is a Japanese character encoding developed by Microsoft and ASCII Corp, default encoding for Japanese Windows."},{"title":"Encoding Characteristics","content":"Variable-length encoding: single byte for ASCII, double byte for Japanese. Compatible with JIS X 0208."}],"featuresTitle":"Key Features","features":["Windows Japanese default","Variable length (1-2 bytes)","Kana and Kanji support"],"applicationsTitle":"Common Applications","applications":["Japanese Windows","Japanese websites","Japanese games and software"]}},"sinCalculator":{"title":"Sin Calculator","angle":"Angle (θ)","unit":"Unit","degrees":"Degrees","radians":"Radians","calculate":"Calculate","clear":"Clear","result":"Result (sin θ)","invalidInput":"Invalid input","guide":{"title":"How to Use","items":["Select the angle unit: Degrees or Radians.","Enter the angle value.","Click 'Calculate' to get the sine value.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Sine (sin)","introduction":"In trigonometry, the sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse in a right-angled triangle.","items":[{"title":"Formula","content":"sin(θ) = Opposite / Hypotenuse"},{"title":"Properties","content":"The sine function is periodic with a period of 2π (360°). Its value oscillates between -1 and 1."}],"featuresTitle":"Common Values","features":["sin(0°) = 0","sin(30°) = 0.5","sin(45°) ≈ 0.7071","sin(60°) ≈ 0.8660","sin(90°) = 1"],"applicationsTitle":"Applications","applications":["Analyzing waveforms in physics and acoustics","Calculating vertical components of vectors","Solving triangles in geometry"]}},"sm2":{"title":"SM2 Cryptography","keyPair":{"title":"Key Pair Management","generate":"Generate Key Pair","public":"Public Key","private":"Private Key","format":"Format","publicKeyPlaceholder":"Enter public key (Hex or PEM)","privateKeyPlaceholder":"Enter private key (Hex or PEM)","error":"Key pair generation failed","clearKey":"Clear Keys"},"crypto":{"title":"Encryption & Decryption","plainFormat":"Plain Text Format","cipherFormat":"Cipher Text Format","cipherStructure":"Cipher Structure","prefix04":"0x04 Prefix","includePrefix":"Include 0x04","plainPlaceholder":{"utf8":"Enter text to encrypt/decrypt","hex":"Enter hex string"},"cipherPlaceholder":{"base64":"Enter base64 text to decrypt","hex":"Enter hex string to decrypt"},"encryptButton":"Encrypt","decryptButton":"Decrypt","noInput":"Please enter text and key","error":"Operation failed","formatError":"Format conversion failed","invalidKey":"Invalid key format","invalidInput":"Invalid input format"},"knowledge":{"title":"About SM2","sections":[{"title":"What is SM2?","content":"SM2 is a public key cryptographic algorithm based on elliptic curves. It is part of Chinese commercial cryptography standard."},{"title":"Key Features","content":"SM2 provides similar security level as RSA-2048 with shorter key lengths, making it more efficient."},{"title":"Applications","content":"Widely used in Chinese financial systems, government systems, and digital certificates."},{"title":"Ciphertext Format & 04 Prefix","content":"According to the GB/T 32918.4 standard, SM2 encrypted output uses the uncompressed elliptic curve point format. The first byte must be 0x04, indicating that the subsequent data contains the full X and Y coordinates. This tool allows you to select whether to include this standard 0x04 prefix in the encrypted result. The ciphertext structure consists of C1 (public key point), C2 (encrypted data), and C3 (hash value)."},{"title":"Cipher Structure: C1C3C2 vs C1C2C3","content":"SM2 encryption defines two common ciphertext concatenations. The original Chinese state standard used the `C1C2C3` structure by default; however, the newer GB/T 32918.4-2016 standard mandates the `C1C3C2` structure. This tool uses `C1C3C2` as the default but provides a compatibility option for `C1C2C3`."},{"title":"Key Format: PEM vs Raw Hex","content":"Keys are typically stored and transmitted in the standard `PEM` format (e.g., Base64 encoded strings headered with `-----BEGIN PUBLIC KEY-----`). `Raw Hex` represents the raw hexadecimal data used by cryptographic algorithms. This tool natively supports conversion and parsing between these two formats for integration flexibility."}]},"signature":{"title":"Digital Signature","message":"Message to Sign","messagePlaceholder":"Enter message to sign","signatureResult":"Signature Result","signaturePlaceholder":"Signature will appear here","signButton":"Sign","verifyButton":"Verify","verifySuccess":"Signature verification successful!","verifyFail":"Signature verification failed!","noInput":"Please input required information","error":"Operation failed, please check your input"}},"sm3":{"title":"SM3 Hash Calculator","placeholder":"Hash result will be displayed here","clear":"Clear","algorithmInfo":"{bits} bits/{chars} characters","case":{"upper":"Upper","lower":"Lower"},"knowledge":{"title":"SM3 Algorithm Knowledge","items":[{"title":"Introduction","content":"SM3 is a cryptographic hash algorithm standard published by the State Cryptography Administration of China, used for digital signatures, message authentication codes, and random number generation."},{"title":"Features","content":"SM3 produces a 256-bit (32-byte) hash value and provides high security and computational efficiency."}],"featuresTitle":"SM3 Characteristics","features":["Compression: Messages of any length are compressed to a fixed length","One-way: Difficult to reverse engineer the original message from hash","Collision resistance: Hard to find two different messages with same hash","Avalanche effect: Small changes in input cause significant changes in output"],"applicationsTitle":"Applications","applications":["Digital signatures","Message integrity verification","Random number generation","Key derivation","E-government systems","Financial transaction systems"]},"error":"Failed to calculate SM3 hash","inputFormat":"Input Format","inputPlaceholder":{"utf8":"Enter text to hash...","hex":"Enter hexadecimal data (e.g., 48656C6C6F)..."}},"sm4":{"title":"SM4 Encryption","config":{"title":"Configuration","key":{"title":"Key","placeholder":{"text":"Enter text key or click generate","hex":"Enter 32-bit hex key or click generate"},"generate":"Generate Random Key","error":"Key must be 16 bytes (32 hex characters)"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter text IV or click generate","hex":"Enter 32-bit hex IV or click generate"},"generate":"Generate Random IV","error":"IV must be 16 bytes (32 hex characters)"},"mode":{"title":"Operation Mode","cbc":"CBC Mode (Recommended)","ecb":"ECB Mode"},"padding":{"title":"Padding Mode","pkcs#7":"PKCS#7 Padding (Recommended)","pkcs#5":"PKCS#5 Padding","none":"No Padding"}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter text to encrypt","hex":"Enter hex string","base64":"Enter Base64 string"},"cipherPlaceholder":{"hex":"Encrypted hex ciphertext","base64":"Encrypted Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV for CBC mode","noInput":"Please enter input text","invalidFormat":"Invalid input format","process":"Encryption/Decryption failed"}},"knowledge":{"title":"About SM4","sections":[{"title":"What is SM4?","content":"SM4 is a block cipher algorithm with 128-bit key length and block size."},{"title":"Operation Modes","content":"ECB mode is simple but less secure. CBC mode provides better security."},{"title":"Applications","content":"Widely used in Chinese financial systems and government applications."}]}},"sphereCalculator":{"title":"Sphere Calculator","description":"Calculate volume and surface area of a sphere.","keywords":"sphere calculator, volume of sphere, surface area of sphere","category":"Math","radius":"Radius (r)","calculate":"Calculate","result":"Results","volume":"Volume","surfaceArea":"Surface Area","circumference":"Circumference","diameter":"Diameter","clear":"Clear","guide":{"title":"How to Use","items":["Enter the radius of the sphere.","Click 'Calculate'.","Volume, Surface Area, Diameter, and Circumference will be displayed."]},"knowledge":{"title":"About Spheres","introduction":"A sphere is a geometrical object in three-dimensional space that is the surface of a ball.","items":[{"title":"Formulas","content":"Volume = (4/3) * π * r^3\nSurface Area = 4 * π * r^2"}],"featuresTitle":"Features","features":["Comprehensive sphere properties","Instant results"],"applicationsTitle":"Applications","applications":["Physics","Astronomy","Sports (balls)"]}},"sqlFormatter":{"title":"SQL Formatter","format":"Format","minify":"Minify","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","dialect":"Dialect","standard":"Standard SQL","mysql":"MySQL","postgresql":"PostgreSQL","sqlite":"SQLite","mariadb":"MariaDB","tsql":"T-SQL (SQL Server)","plsql":"PL/SQL (Oracle)","invalidSql":"Error formatting SQL","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format and minify SQL queries","Support for multiple SQL dialects (MySQL, PostgreSQL, etc.)","Syntax highlighting","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"SQL Knowledge","introduction":"SQL (Structured Query Language) is a standard language for managing data held in a relational database management system (RDBMS).","items":[{"title":"Basic Commands","content":"SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER"},{"title":"Clauses","content":"FROM, WHERE, GROUP BY, HAVING, ORDER BY, LIMIT"}],"featuresTitle":"Key Features","features":["Declarative language","Set-based processing","Standardized (ANSI/ISO)"],"applicationsTitle":"Applications","applications":["Data analysis","Backend development","Database administration"]}},"sqlMinify":{"title":"SQL Minifier","description":"Compress SQL queries by removing comments and unnecessary whitespace.","input":"Input SQL","output":"Minified SQL","minify":"Minify SQL","copy":"Copy","copied":"Copied to clipboard","success":"SQL minified successfully","error":"Error minifying SQL"},"ssh-key-generator":{"title":"SSH Key Generator","config":{"title":"SSH Parameters","algorithm":"Algorithm","comment":"Comment / Email Tag","generateBtn":"Generate SSH Keys"},"results":{"title":"SSH Keys Generated","publicKey":"Public Key (authorized_keys)","privateKey":"Private Key (id_rsa / id_ed25519)","downloadPub":"Download .pub","downloadPriv":"Download Private"}},"sslChecker":{"title":"SSL Checker","description":"Check the SSL/TLS certificate details for a domain, including expiration date, issuer, and validity.","input":{"label":"Domain Name","placeholder":"e.g., visualstudio.com","button":"Check SSL"},"result":{"title":"Certificate Details","subject":"Subject","issuer":"Issuer","validNoBefore":"Valid From","validNoAfter":"Valid Until","daysRemaining":"Days Remaining","serialNumber":"Serial Number","fingerprint":"Fingerprint (SHA-1)","valid":"Valid","expired":"Expired","error":"Error"},"guide":{"title":"How to use SSL Checker","items":["Enter the domain name (hostname) you want to check (e.g., google.com).","Click 'Check SSL' to retrieve the certificate information.","Review the certificate details, especially the expiration date."]},"knowledge":{"title":"About SSL Certificates","items":[{"title":"What is SSL/TLS?","content":"SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) are protocols for establishing authenticated and encrypted links between networked computers."},{"title":"Why check SSL?","content":"To ensure your website is secure, verify the identity of the certificate issuer, and prevent service interruptions due to expired certificates."},{"title":"Certificate Validity","content":"Certificates are issued for a specific period. It is crucial to renew them before they expire to maintain trust and security."}]}},"standardDeviationCalculator":{"title":"Standard Deviation Calculator","description":"Calculate the sample and population standard deviation of a dataset.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 10, 20, 30, 40, 50","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","sample":"Sample Standard Deviation","population":"Population Standard Deviation","guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate both sample and population standard deviations.","The sample standard deviation is used when your data is a sample of a larger population.","The population standard deviation is used when your data represents the entire population."]},"knowledge":{"title":"About Standard Deviation","introduction":"Standard deviation is a measure of the amount of variation or dispersion of a set of values.","items":[{"title":"Definition","content":"A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range."},{"title":"Sample vs Population","content":"Sample Standard Deviation (s): An estimate of the population standard deviation based on a sample. It divides by (n-1) where n is the sample size (Bessel's correction).\nPopulation Standard Deviation (σ): The exact standard deviation of an entire population. It divides by N where N is the population size."}],"featuresTitle":"Key Features","features":["Calculates both sample and population standard deviations.","Supports various input formats."],"applicationsTitle":"Applications","applications":["Risk assessment in finance (volatility).","Quality control in manufacturing.","Analyzing experimental data in science."]}},"statisticsCalculator":{"title":"Statistics Calculator","description":"Calculate comprehensive statistics for a dataset, including mean, median, mode, range, variance, and standard deviation.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 10, 20, 30, 40, 50 or 10 20 30 40 50","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","results":{"count":"Count","sum":"Sum","mean":"Mean (Average)","median":"Median","mode":"Mode","min":"Minimum","max":"Maximum","range":"Range","variance":"Sample Variance","stdDev":"Sample Standard Deviation"},"guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate the statistical properties.","The calculator will determine count, sum, mean, median, mode, range, variance, and standard deviation."]},"knowledge":{"title":"About Statistical Properties","introduction":"Descriptive statistics provide a summary of a dataset, helping to understand its central tendency, dispersion, and overall shape.","items":[{"title":"Measures of Central Tendency","content":"Mean (Average): The sum of all values divided by the number of values.\nMedian: The middle value when the data is sorted. If there is an even number of values, it's the average of the two middle values.\nMode: The value(s) that appear most frequently in the dataset."},{"title":"Measures of Dispersion","content":"Range: The difference between the maximum and minimum values.\nVariance: A measure of how much the values in the dataset vary from the mean.\nStandard Deviation: The square root of the variance, representing the average distance of the values from the mean."}],"featuresTitle":"Key Features","features":["Comprehensive statistical analysis in one tool.","Supports various input formats (comma, space, or newline separated).","Calculates both central tendency and dispersion metrics."],"applicationsTitle":"Applications","applications":["Data analysis and exploration.","Research and academic studies.","Quality control and process improvement."]}},"stopwatch":{"title":"Online Stopwatch with Laps","description":"A highly accurate online stopwatch supporting milliseconds.","start":"Start","stop":"Stop","resume":"Resume","reset":"Reset","lap":"Lap","clearLaps":"Clear Laps","lapTime":"Lap Time","splitTime":"Split Time","totalTime":"Total Time","lapNumber":"Lap #","guide":{"title":"How to Use","items":["Press the green Play button to start timing.","Press the red Stop button to pause the stopwatch.","Press the Flag button while running to record a lap split time.","Press Reset to clear the timer and all recorded laps.","Use 'Clear Laps' in the table header to remove lap records without resetting the timer."]},"knowledge":{"title":"About Stopwatches","sections":[{"title":"Centisecond Precision","content":"This stopwatch updates every 10ms, displaying time in hundredths of a second (centiseconds), suitable for most sports timing needs."},{"title":"Lap vs Split Time","content":"A lap time measures the duration of each individual lap. A split time shows the total elapsed time at the moment the lap button was pressed."},{"title":"Browser Accuracy","content":"JavaScript timers may have slight drift due to browser tab throttling. For professional-grade timing, dedicated hardware stopwatches are recommended."}]}},"subnetCalculator":{"title":"Subnet Calculator","description":"Calculate network details from IP address and subnet mask (CIDR).","ipAddress":"IP Address","cidr":"CIDR / Subnet Mask","calculate":"Calculate","results":{"networkAddress":"Network Address","broadcastAddress":"Broadcast Address","ipRange":"IP Range","firstHost":"First Host","lastHost":"Last Host","totalHosts":"Total Hosts","usableHosts":"Usable Hosts","subnetMask":"Subnet Mask","wildcardMask":"Wildcard Mask","binaryIp":"Binary IP","ipClass":"IP Class","ipType":"IP Type"},"guide":{"title":"How to use Subnet Calculator","items":["Enter an IP address (e.g., 192.168.1.1).","Select a subnet mask or enter CIDR notation (e.g., /24).","The calculator automatically updates the network details."]},"knowledge":{"title":"Subnetting Knowledge","items":[{"title":"What is Subnetting?","content":"Subnetting is the practice of dividing a network into two or more smaller networks. It increases routing efficiency and enhances network security."},{"title":"CIDR Notation","content":"Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. It uses a suffix (e.g., /24) to indicate the number of bits in the network prefix."}],"featuresTitle":"Key Features","features":["Real-time calculation","Support for all CIDR prefixes (/0 to /32)","Detailed network information including Broadcast and Range","Binary representation view"],"applicationsTitle":"Common Uses","applications":["Network planning and design","Configuring routers and switches","IP address management (IPAM)","Subnetting for security and performance"]}},"sum":{"title":"Checksum Calculator","inputFormat":"Input Format","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate checksum..."},"results":{"hex":"Checksum Result (Hex)","dec":"Checksum Result (Dec)","oct":"Checksum Result (Oct)","bin":"Checksum Result (Bin)"},"knowledge":{"title":"Checksum Knowledge","description":"Checksum is a simple data verification method that sums up all bytes in a data stream and takes the lower 8 bits as the checksum.","features":{"title":"Features","items":["Simple calculation: Only requires addition","Good real-time performance: Can calculate while receiving data","Low resource usage: Only needs one byte of storage","Suitable for embedded systems: Low processor requirements"]},"applications":{"title":"Applications","items":["File integrity verification","Network data transmission","Simple data transmission verification","Embedded device communication","Real-time data verification"]},"security":{"title":"Security Recommendations","items":["Not suitable for security-related scenarios","Recommended to use with other verification methods","Pay attention to data format correctness","Consider using stronger verification algorithms"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"sunriseSunset":{"title":"Sunrise & Sunset Calculator","description":"Calculate exact sunrise, sunset, dawn, dusk, and solar noon times.","location":"Location","latitude":"Latitude (e.g. 40.7128)","longitude":"Longitude (e.g. -74.0060)","getLiveLocation":"Use My Location","date":"Select Date","calculate":"Calculate","sunrise":"Sunrise","sunset":"Sunset","solarNoon":"Solar Noon","dayLength":"Day Length","dawn":"Dawn (Civil Twilight Begins)","dusk":"Dusk (Civil Twilight Ends)","timezone":"Timezone","locationError":"Could not access location. Please enter coordinates manually.","invalidCoordinates":"Please enter valid latitude (-90 to 90) and longitude (-180 to 180).","guide":{"title":"How to Use","items":["Allow location access when prompted, or enter your latitude and longitude manually.","Select the date you want to calculate sunrise and sunset times for.","Click 'Calculate' to get sunrise, sunset, solar noon, day length, dawn, and dusk.","All times are displayed in your local timezone.","Get coordinates from Google Maps by right-clicking any location on the map."]},"knowledge":{"title":"About Sunrise & Sunset","sections":[{"title":"Solar Angles","content":"Sunrise and sunset are calculated from the Sun's apparent position relative to the horizon, depending on your latitude, longitude, and the time of year."},{"title":"Civil Twilight","content":"Dawn (civil twilight begins) is when the Sun is 6° below the horizon — enough light for outdoor activities. Dusk is the equivalent evening moment."},{"title":"Seasonal Variation","content":"Day length varies dramatically by season and latitude. Near the poles, summer brings midnight sun (24h daylight) and winter brings polar night (0h daylight)."}]}},"svgToPng":{"title":"SVG to PNG Converter","description":"Convert SVG vector graphics to high-quality PNG raster images","uploadTitle":"Upload SVG File","resultTitle":"Converted PNG Image","guide":{"title":"How to Use","items":["Upload an SVG file by clicking or dragging","The SVG will render as a preview","Click 'Convert' to rasterize to PNG","The PNG output preserves SVG dimensions","Download the converted PNG file","SVG with embedded fonts may render differently","Transparent backgrounds are preserved in PNG output"]},"knowledge":{"title":"About SVG to PNG Conversion","items":[{"title":"Why Convert SVG to PNG?","content":"While SVG is excellent for scalable graphics, some applications and platforms only accept raster formats like PNG. Converting SVG to PNG is necessary for use in presentations, documents, social media, and applications that don't support vector graphics natively."},{"title":"Vector vs Raster Graphics","content":"SVG (Scalable Vector Graphics) uses mathematical paths to define shapes, allowing infinite scaling without quality loss. PNG is a raster format using pixels, which means it has fixed dimensions. When converting, the PNG captures the SVG at its current size."},{"title":"Preserving Quality","content":"This tool renders SVG at its native dimensions to produce a high-quality PNG. The transparent background is preserved when converting. For best results, ensure your SVG has proper viewBox and dimension attributes defined."},{"title":"Browser-Based Rendering","content":"The conversion uses the browser's native SVG rendering engine and HTML5 Canvas for rasterization. This ensures accurate rendering of SVG features and complete privacy since no files leave your device."}],"featuresTitle":"Key Features","features":["High-quality SVG to PNG rasterization","Preserves transparency from SVG","Uses browser native SVG rendering engine","No file upload required — 100% private"],"applicationsTitle":"Common Use Cases","applications":["Converting logos for social media profiles","Preparing icons for mobile app development","Creating PNG versions of diagrams for documents","Generating raster assets from vector designs"]}},"tanCalculator":{"title":"Tan Calculator","angle":"Angle (θ)","unit":"Unit","degrees":"Degrees","radians":"Radians","calculate":"Calculate","clear":"Clear","result":"Result (tan θ)","invalidInput":"Invalid input","undefined":"Undefined","guide":{"title":"How to Use","items":["Select the angle unit: Degrees or Radians.","Enter the angle value.","Click 'Calculate' to get the tangent value.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Tangent (tan)","introduction":"In trigonometry, the tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side in a right-angled triangle.","items":[{"title":"Formula","content":"tan(θ) = Opposite / Adjacent = sin(θ) / cos(θ)"},{"title":"Properties","content":"The tangent function is periodic with a period of π (180°). It is undefined at 90°, 270°, etc., where cos(θ) = 0."}],"featuresTitle":"Common Values","features":["tan(0°) = 0","tan(30°) ≈ 0.5774","tan(45°) = 1","tan(60°) ≈ 1.7321","tan(90°) = Undefined"],"applicationsTitle":"Applications","applications":["Calculating slopes and inclines","Determining heights and distances in surveying","Navigational calculations"]}},"terms":{"title":"Terms of Service","lastUpdated":"Last Updated: July 17, 2025","introduction":{"title":"Terms of Service Description","content":"Welcome to Online Calculator Tools! These Terms of Service constitute a legal agreement between you and Online Calculator Tools, defining your rights and obligations when using our services.\n\nBy accessing or using our website and services, you agree to comply with all terms and conditions of this agreement. If you do not agree to any part of this agreement, please do not use our services.\n\nWe recommend that you carefully read and understand these Terms of Service. If you have any questions, please feel free to contact us."},"sections":[{"title":"1. Service Description and Scope","content":"Online Calculator Tools is a professional online calculator tool platform providing the following services:","items":["Encryption/Decryption - AES, RSA, MD5, SHA1, SHA256, SHA512, etc.","Hash Calculation - MD5, SHA1, SHA256, SHA512, etc.","Checksum Calculation - CRC, LRC, etc.","Formatting Tools - JSON, XML, CSV, INI, TXT, etc.","Time Calculation - Timestamp Conversion, Time Difference Calculation, Time Formatting, etc.","Unit Conversion - Length, Angle, Area, Volume, Mass, Temperature, Time, Currency, etc.","Cron Expression - Linux Cron, Spring Cron, Quartz Cron, etc."]},{"title":"2. User Accounts and Responsibilities","content":"When using our services, you need to comply with the following regulations:","items":["Ensure that you provide true, accurate, and complete information","Properly safeguard your account information and login credentials","Take responsibility for all activities under your account","Update your contact information and related data in a timely manner","Do not transfer or lend your account to others","Notify us immediately if you discover unauthorized use of your account"]},{"title":"3. Usage Rules and Restrictions","content":"To maintain a good service environment, you agree to comply with the following usage rules:","items":["Use our tools only for legal online calculator related purposes","Do not use our services for any illegal or unlawful activities","Do not maliciously attack, damage, or interfere with our servers and networks","Do not spread viruses, malicious code, or harmful programs","Do not infringe upon others' intellectual property or other legitimate rights","Do not publish false, misleading, or harmful information content","Comply with relevant online calculator standards and safety regulations"]},{"title":"4. Intellectual Property Protection","content":"We strictly protect intellectual property rights, with the following regulations:","items":["All content on this website (including software, documentation, interface design, etc.) is protected by intellectual property law","Without authorization, you may not copy, modify, distribute, or reverse engineer our software","Do not remove or modify any copyright, trademark, or other intellectual property markings","Users may use service functions normally within our authorized scope","If intellectual property infringement is discovered, we will pursue legal responsibility according to law","Respect third-party intellectual property rights and do not infringe upon others' rights during use"]},{"title":"5. Privacy and Data Protection","content":"We are committed to protecting user privacy and data security:","items":["Strictly process user personal information according to our privacy policy","Adopt appropriate technical and management measures to protect user data","Will not access, use, or disclose user data without authorization","Tools prioritize client-side data processing to reduce data transmission","Users are responsible for their own input online calculator data; we do not bear responsibility for data content","We recommend users not to input confidential or sensitive online calculator data in tools"]},{"title":"6. Service Fees and Payment","content":"Regarding service fees:","items":["Basic tool functions are provided free to all users","Advanced functions or enterprise services may incur corresponding fees","Specific prices for paid services will be clearly marked on service pages","Payment methods and processes will be determined according to service type","Virtual services generally do not support refunds once delivered","We reserve the right to adjust service prices but will notify existing users in advance"]},{"title":"7. Service Availability and Maintenance","content":"Regarding service stability and maintenance:","items":["We strive to maintain service stability and availability","Services may be temporarily interrupted due to system maintenance, upgrades, etc.","Important maintenance activities will be notified to users in advance","We are not responsible for service interruptions caused by force majeure factors (such as natural disasters, government regulations, etc.)","Network failures, server failures, and other technical issues may affect normal service use","We will try to restore services quickly but do not guarantee specific recovery times"]},{"title":"8. Liability Limitation and Disclaimer","content":"Regarding service liability limitations and disclaimer clauses:","items":["The tools on this website are for reference use only; we do not guarantee absolute accuracy of results","Users should verify tool output results according to actual circumstances","We are not liable for any losses arising from using our services","We are not responsible for indirect losses, profit losses, data losses, etc.","Our total liability does not exceed the service fees paid by users","We recommend users conduct sufficient testing and verification before using in production environments"]},{"title":"9. Service Changes and Termination","content":"Regarding service changes and termination regulations:","items":["We reserve the right to modify, suspend, or terminate services at any time","Major changes will be notified to users in advance with reasonable transition time","If users violate the terms of service, we have the right to terminate their usage rights","When services are terminated, users should stop using related functions","We will properly handle user data but do not guarantee permanent data preservation","Service termination does not affect the rights and obligations arising before termination"]},{"title":"10. Dispute Resolution and Legal Application","content":"Regarding dispute handling regulations:","items":["Both parties should first resolve disputes through friendly negotiation","If some agreement clauses are invalid, it does not affect the validity of other clauses","We reserve the right to final interpretation of agreement terms","When applicable laws change, the agreement will be adjusted accordingly"]},{"title":"11. Terms Updates and Notifications","content":"Regarding terms update regulations:","items":["We reserve the right to modify these Terms of Service at any time","Important modifications will be notified to users through website announcements, emails, etc.","Updated terms will be published on the website and take effect immediately","Continued use of services is deemed as agreement to modified terms","We recommend users regularly check this page to understand the latest Terms of Service","If you do not agree to modified terms, please stop using our services"]},{"title":"12. Contact Information and Feedback","content":"If you have any questions or need support, please contact us:","contact":{"email":"support@calctools.online","purpose":"Terms of service consultation, complaints and suggestions, technical support, etc.","responseTime":"We will reply within 2 business days after receiving contact","businessHours":"Service hours: Monday to Friday 9:00-18:00"}}]},"text":{"title":"Text Tools","description":"Collection of various text processing and conversion tools","tools":{"caseConverter":{"title":"Case Converter | Text Case Transformation Tool","description":"Free online text case converter. Instantly convert text to Uppercase, Lowercase, Title Case, Sentence Case, CamelCase, and more. Supports batch processing for developers and writers.","guide":{"title":"How to Use Case Converter","items":["Paste or type your text into the input box.","Select your desired format (e.g., 'UPPERCASE', 'camelCase').","The text converts instantly.","Click 'Copy' to use the result."]},"knowledge":{"title":"About Text Case","items":[{"title":"Why Convert Case?","content":"Different contexts require different text formats. Coding often requires specific naming conventions (like camelCase), while writing needs Title Case for headlines."},{"title":"Supported Formats","content":"Supports standard programming conventions (Camel, Pascal, Snake, Kebab) and general text styles (Upper, Lower, Title, Sentence)."}],"featuresTitle":"Key Features","features":["8+ conversion modes","Instant processing","Privacy-first: No server upload","One-click copy"],"applicationsTitle":"Common Applications","applications":["Variable renaming (coding)","Headline formatting","Data standardization","CSS class generation"]},"ui":{"uppercase":"UPPERCASE","lowercase":"lowercase","titleCase":"Title Case","sentenceCase":"Sentence case","camelCase":"camelCase","pascalCase":"PascalCase","snakeCase":"snake_case","kebabCase":"kebab-case"}},"camelCase":{"title":"Camel Case Converter | Text to camelCase","description":"Online Camel Case generator. Convert text to camelCase format instantly. Removes spaces/punctuation, lowercase first word, capitalizes subsequent words. Ideal for Java/JS variables.","guide":{"title":"How to Use Camel Case Converter","items":["Enter your text or sentence.","Text converts to camelCase (e.g., myVariableName) automatically.","Copy the result for your code."]},"knowledge":{"title":"About Camel Case","items":[{"title":"What is Camel Case?","content":"Camel Case is a naming convention where words are joined without spaces, and each word (except the first) begins with a capital letter."}],"featuresTitle":"Features","features":["Instant conversion","Removes special characters","Developer friendly"],"applicationsTitle":"Applications","applications":["Java variables","JavaScript functions","JSON keys"]}},"snakeCase":{"title":"Snake Case Converter | Text to snake_case","description":"Online Snake Case generator. Convert text to snake_case (lowercase with underscores). Perfect for Python variables and database fields.","guide":{"title":"How to Use","items":["Input text.","Get snake_case result (my_variable_name).","Copy to clipboard."]},"knowledge":{"title":"About Snake Case","items":[{"title":"Definition","content":"Snake Case separates words with underscores (_) and uses all lowercase letters. It is standard in Python and SQL."}],"featuresTitle":"Features","features":["Lowercase only","Underscore separator","Readable"],"applicationsTitle":"Applications","applications":["Python coding","Database column names","File naming"]}},"kebabCase":{"title":"Kebab Case Converter | Text to kebab-case","description":"Online Kebab Case generator. Convert text to kebab-case (lowercase with hyphens). Essential for URL slugs and CSS class names.","guide":{"title":"How to Use","items":["Type text.","View kebab-case result (my-variable-name).","Copy instantly."]},"knowledge":{"title":"About Kebab Case","items":[{"title":"Definition","content":"Kebab Case (or Spinal Case) uses hyphens (-) to separate words. It is the standard for URLs and CSS classes."}],"featuresTitle":"Features","features":["URL safe","CSS compatible","Hyphenated"],"applicationsTitle":"Applications","applications":["SEO URLs","CSS Classes","Kubernetes resources"]}},"pascalCase":{"title":"Pascal Case Converter | Text to PascalCase","description":"Online Pascal Case generator. Convert text to PascalCase (UpperCamelCase). Capitalize every word, no separators. Best for class names.","guide":{"title":"How to Use","items":["Enter text.","Get PascalCase result (MyClassName).","Copy output."]},"knowledge":{"title":"About Pascal Case","items":[{"title":"Definition","content":"Pascal Case is similar to Camel Case but the first letter is also capitalized. It is widely used for class names in C#, Java, and other languages."}],"featuresTitle":"Features","features":["Capitalized words","No separators","Clean format"],"applicationsTitle":"Applications","applications":["Class names","Constructors","Interface names"]}},"titleCase":{"title":"Title Case Converter | Capitalize Every Word","description":"Online Title Case tool. Capitalize the first letter of each word in your text. Perfect for headlines, book titles, and subject lines.","guide":{"title":"How to Use","items":["Input your headline.","Convert to Title Case (My Article Title).","Copy for publication."]},"knowledge":{"title":"About Title Case","items":[{"title":"Usage","content":"Title Case capitalizes the major words in a sentence, commonly used for titles of works, headlines, and headers."}],"featuresTitle":"Features","features":["Smart capitalization","Preserves spaces","Professional look"],"applicationsTitle":"Applications","applications":["Blog titles","Book names","Email subjects"]}},"wordCounter":{"title":"Online Word Counter | Real-time Word and Character Count","description":"Free online word counter tool. Count words, characters (with/without spaces), lines, and paragraphs in real-time. Ideal for writing, SEO, and translation.","guide":{"title":"How to Use Word Counter","items":["Type or paste your text directly into the input area.","Statistics for words, characters, lines, etc., update instantly.","Click the 'Clear' button to reset the text and counters.","Use the 'Copy' button to copy your text with one click."]},"knowledge":{"title":"About Word Counting","items":[{"title":"Word vs. Character Count","content":"'Word Count' tracks the number of distinct words (separated by spaces), vital for English essays. 'Character Count' includes all symbols and punctuation, often used for social media limits or Chinese text."},{"title":"Characters Without Spaces","content":"This metric excludes all whitespace (spaces, tabs, newlines), providing a precise count of visible content characters, useful for translation pricing or specific formatting requirements."}],"featuresTitle":"Key Features","features":["Instant real-time analysis","Comprehensive stats: Words, Characters, Lines, Paragraphs","High performance with large texts","Privacy-focused: Text is processed locally, never uploaded"],"applicationsTitle":"Common Applications","applications":["Blog posts and article writing","Social media post length checks (Twitter, etc.)","Translation workload estimation","Code and script analysis"]},"ui":{"words":"Words","characters":"Characters","lines":"Lines","paragraphs":"Paragraphs","noSpaces":"Chars (No Spaces)"}},"frequencyAnalyzer":{"title":"Word Frequency Analyzer | Text Statistics","description":"Online word frequency counter. Analyze text to find the most frequent words and characters. Supports case sensitivity and stop word filtering.","ui":{"results":"Frequency Results","word":"Word","count":"Count","frequency":"Frequency","graph":"Graph","showingTop100":"Showing top 100 most frequent words"},"guide":{"title":"How to Use","items":["Paste your text.","The tool automatically generates a frequency list.","View the chart for visual distribution.","Toggle case sensitivity if needed."]},"knowledge":{"title":"About Frequency Analysis","items":[{"title":"Term Frequency","content":"The number of times a word appears in a document. Used in SEO and cryptography."}],"featuresTitle":"Features","features":["Automatic tokenization","Frequency sorting","Visual charts","Multi-language support"],"applicationsTitle":"Applications","applications":["SEO Keyword analysis","Stylometry","Language learning","Text mining"]}},"removeWhitespace":{"title":"Remove Whitespace | Text Cleaner","description":"Online whitespace remover. Delete all spaces, tabs, and line breaks from text, or just trim leading/trailing whitespace.","ui":{"allWhitespace":"All Whitespace","spacesOnly":"Spaces Only","lineBreaksOnly":"Line Breaks Only","removeBtn":"Remove Whitespace"},"guide":{"title":"How to Use","items":["Enter text with extra spaces.","Select a mode (All spaces, Extra spaces, Trim).","Get cleaned text."]},"knowledge":{"title":"About Whitespace","items":[{"title":"Whitespace Characters","content":"Invisible characters like space, tab, and newline that affect formatting."}],"featuresTitle":"Features","features":["Multiple modes","One-click clean","Preserves line breaks (optional)"],"applicationsTitle":"Applications","applications":["Minifying code","Data cleaning","Formatting text"]}},"trimLines":{"title":"Trim Lines | Remove Leading/Trailing Spaces","description":"Online line trimmer. Remove whitespace from the beginning and end of every line in your text while preserving indentation if needed.","ui":{"trimBoth":"Trim Both Ends","trimStart":"Trim Start","trimEnd":"Trim End","trimBtn":"Trim Lines"},"guide":{"title":"How to Use","items":["Paste multi-line text.","The tool trims start/end spaces of each line.","Copy the result."]},"knowledge":{"title":"About Trimming","items":[{"title":"Trim Operation","content":"Removing whitespace from the ends of a string. Essential for parsing configuration files or code."}],"featuresTitle":"Features","features":["Line-by-line processing","Smart trimming","Fast and efficient"],"applicationsTitle":"Applications","applications":["Code formatting","Config cleanup","Log analysis"]}},"shuffleLines":{"title":"Random Line Shuffler | Text Randomizer","description":"Online line shuffler. Randomize the order of lines in a list or text document. Perfect for raffles, randomized testing, and data sampling.","ui":{"shuffleBtn":"Shuffle Lines"},"guide":{"title":"How to Use","items":["Input a list of items.","Click 'Shuffle'.","Get a randomized list."]},"knowledge":{"title":"About Shuffling","items":[{"title":"Randomization","content":"Uses algorithms like Fisher-Yates to ensure every permutation is equally likely."}],"featuresTitle":"Features","features":["True randomness","Preserves content","Easy to use"],"applicationsTitle":"Applications","applications":["Raffles","Random grouping","Test data generation","Flashcards"]}},"joinLines":{"title":"Join Lines | Text Merger","description":"Online tool to join multiple lines into one. Merge text with custom delimiters like commas, spaces, or symbols.","ui":{"delimiter":"Delimiter","joinBtn":"Join Lines"},"guide":{"title":"How to Use","items":["Input multi-line text.","Set delimiter (comma, space, etc.).","Get single-line output."]},"knowledge":{"title":"About Joining","items":[{"title":"Usage","content":"Converting vertical lists to horizontal strings, often for SQL 'IN' clauses or CSVs."}],"featuresTitle":"Features","features":["Custom delimiter","Remove empty lines","Instant merge"],"applicationsTitle":"Applications","applications":["SQL query building","CSV creation","JSON array generation"]}},"splitText":{"title":"Split Text | Text Divider","description":"Online text splitter. Split a long text string into multiple lines based on a custom delimiter or regular expression.","ui":{"delimiter":"Delimiter","splitBtn":"Split Text"},"guide":{"title":"How to Use","items":["Input text with delimiters.","Specify the delimiter (e.g., comma).","Get text split into lines."]},"knowledge":{"title":"About Splitting","items":[{"title":"Delimiter","content":"A character or sequence that marks the boundary between plain text data chunks."}],"featuresTitle":"Features","features":["Custom delimiter","Regex support","Line breaking"],"applicationsTitle":"Applications","applications":["Parsing CSV","Log splitting","Field extraction"]}},"removeDuplicates":{"title":"Remove Duplicate Lines","description":"Remove duplicate lines from text online. Support case sensitivity and whitespace trimming.","guide":{"title":"How to use Remove Duplicates","items":["Enter your list of text in the input box.","Select options: 'Ignore Case' to treat 'Apple' and 'apple' as same, 'Trim Whitespace' to ignore leading/trailing spaces.","Click 'Remove Duplicates'.","The unique list appears in the output box."]},"knowledge":{"title":"About Deduplication","items":[{"title":"What is Deduplication?","content":"The process of eliminating duplicate copies of repeating data."},{"title":"Case Sensitivity","content":"Determines if uppercase and lowercase letters are treated as distinct (e.g., 'A' vs 'a')."}],"featuresTitle":"Features","features":["Remove duplicate lines","Optional case sensitivity","Optional whitespace trimming","Preserves order"],"applicationsTitle":"Applications","applications":["Email list cleaning","Data preparation","Inventory management","Code cleanup"]},"ui":{"ignoreCase":"Ignore Case","trimWhitespace":"Trim Whitespace","removeDuplicatesBtn":"Remove Duplicates"}},"reverseString":{"title":"Reverse String","description":"Reverse text or words online. Simple text reversal tool.","guide":{"title":"How to use Reverse String","items":["Enter the text you want to reverse in the input box.","Click 'Reverse Text' to reverse the entire string (e.g. 'abc' -> 'cba').","Click 'Reverse Words' to reverse the order of words (e.g. 'one two' -> 'two one').","Reversed text appears in the output box.","Use 'Copy' to grab the result."]},"knowledge":{"title":"About String Reversal","items":[{"title":"String Reversal","content":"Reversing the sequence of characters in a string. 'hello' becomes 'olleh'."},{"title":"Word Reversal","content":"Keeping the characters within words intact but reversing the order of the words themselves."}],"featuresTitle":"Features","features":["Instant character reversal","Word order reversal","Preserves spaces and special chars","Handles large text"],"applicationsTitle":"Applications","applications":["Data obfuscation","Puzzle solving","Software testing","Creative writing"]},"ui":{"reverseText":"Reverse Text","reverseWords":"Reverse Words"}},"sortLines":{"title":"Sort Lines","description":"Sort text lines alphabetically or numerically. Ascending, descending, and case-insensitive options.","guide":{"title":"How to use Sort Lines","items":["Enter multiple lines of text in the input.","Choose sort order: Ascending (A-Z) or Descending (Z-A).","Optionally enable 'Ignore Case' to treat upper/lower case as equal.","Enable 'Numeric Sort' if lines start with numbers.","Click 'Sort' to see results."]},"knowledge":{"title":"About Sorting","items":[{"title":"Alphabetical Sort","content":"Ordering lines based on the alphabetical order of characters."},{"title":"Numeric Sort","content":"Ordering lines by numerical value, treating '10' as greater than '2'."}],"featuresTitle":"Features","features":["Ascending & Descending","Case-insensitive option","Numeric sort option","Preserves line content"],"applicationsTitle":"Applications","applications":["Data organization","List ordering","Log analysis","Roster sorting"]},"ui":{"order":"Order","ascending":"Ascending (A-Z)","descending":"Descending (Z-A)","ignoreCase":"Ignore Case","numericSort":"Numeric Sort","sortBtn":"Sort"}},"removeEmptyLines":{"title":"Remove Empty Lines","description":"Remove empty and blank lines from text. Clean up your content.","guide":{"title":"How to use Remove Empty Lines","items":["Paste text with empty lines into the input.","Optionally enable 'Trim Lines' to remove lines containing only whitespace.","Click 'Remove Empty Lines'.","Copy the cleaned text from the output."]},"knowledge":{"title":"About Empty Lines","items":[{"title":"Empty Line","content":"A line containing absolutely no characters."},{"title":"Blank Line","content":"A line containing only whitespace characters like spaces or tabs."}],"featuresTitle":"Features","features":["Remove fully empty lines","Optional whitespace-only line removal","Preserves content","Fast processing"],"applicationsTitle":"Applications","applications":["Code cleanup","Document formatting","Data cleaning","Log processing"]},"ui":{"trimLines":"Also remove lines with only whitespace","removeBtn":"Remove Empty Lines"}},"loremIpsum":{"title":"Lorem Ipsum Generator","description":"Generate Lorem Ipsum placeholder text. Create paragraphs, sentences, or words.","guide":{"title":"How to use Lorem Ipsum Generator","items":["Select the type of content: Paragraphs, Sentences, or Words.","Enter the quantity to generate.","Optionally check 'Start with Lorem ipsum' for the classic opening.","Click 'Generate'.","Copy the text for your project."]},"knowledge":{"title":"About Lorem Ipsum","items":[{"title":"What is it?","content":"Lorem Ipsum is dummy text used in the printing and typesetting industry since the 1500s."},{"title":"Why use it?","content":"It allows designers to focus on visual elements without being distracted by meaningful content."}],"featuresTitle":"Features","features":["Generate paragraphs, sentences, words","Customizable quantity","Classic start option","Randomized content"],"applicationsTitle":"Applications","applications":["Web design mockups","Print layouts","UI prototyping","Document templates"]},"ui":{"type":"Type","paragraphs":"Paragraphs","sentences":"Sentences","words":"Words","count":"Quantity","startWithLorem":"Start with 'Lorem ipsum'","generateBtn":"Generate"}},"slugGenerator":{"title":"Slug Generator","description":"Generate SEO-friendly URL slugs. Convert text to clean, readable URLs.","guide":{"title":"How to use Slug Generator","items":["Enter your title or text.","Choose your preferred separator (hyphen, underscore, or dot).","Select 'Lowercase' to force all characters to lowercase (recommended for URLs).","Copy the generated slug instantly."]},"knowledge":{"title":"About URL Slugs","items":[{"title":"What is a Slug?","content":"The part of a URL that identifies a particular page in a human-readable format."},{"title":"SEO Importance","content":"Clean slugs help search engines understand page content and improve user experience."}],"featuresTitle":"Features","features":["Instant conversion","Custom separators","Special char removal","Auto lowercase"],"applicationsTitle":"Applications","applications":["Blog post URLs","Product page links","File naming","Database keys"]},"ui":{"separator":"Separator","hyphen":"Hyphen (-)","underscore":"Underscore (_)","dot":"Dot (.)","lowercase":"Lowercase"}},"numberLines":{"title":"Number Lines","description":"Add line numbers to text. Customize start number and separator.","guide":{"title":"How to use Number Lines","items":["Paste your text.","Set the 'Start Number' (default is 1).","Customize the 'Separator' (e.g. '. ' or ': ').","Click 'Add Line Numbers'.","Copy the numbered text."]},"knowledge":{"title":"About numbering","items":[{"title":"Usage","content":"Often used for code presentation, legal documents, and referencing."},{"title":"Format","content":"Usually consists of a digit followed by a separator and then the line content."}],"featuresTitle":"Features","features":["Custom start number","Custom separator","Handles large text","Preserves formatting"],"applicationsTitle":"Applications","applications":["Code sharing","Script review","Legal document formatting","List creation"]},"ui":{"startNumber":"Start Number","separator":"Separator","numberBtn":"Add Line Numbers"}},"reverseLines":{"title":"Reverse Line Order","description":"Reverse the order of lines in text. Flip lists or documents upside down.","guide":{"title":"How to use Reverse Lines","items":["Input multi-line text.","Click 'Reverse Lines'.","The last line becomes the first, and so on.","Copy the result."]},"knowledge":{"title":"About Line Reversal","items":[{"title":"Line Reversal","content":"Changing the vertical order of lines without altering the content within each line."},{"title":"vs String Reverse","content":"Unlike string reverse, this keeps words and sentences readable, only changing their sequence."}],"featuresTitle":"Features","features":["Maintains line integrity","Instant processing","Simple one-click","Handles empty lines"],"applicationsTitle":"Applications","applications":["Reordering lists","Log analysis (newest first)","Chat history reversal","Data processing"]},"ui":{"reverseBtn":"Reverse Lines"}},"extractEmails":{"shortTitle":"Extract Emails","title":"Extract Emails Online | Email Scraper","description":"Extract all email addresses from a block of text automatically.","metadata":{"keywords":["extract emails","email scraper","find emails","email extractor"],"openGraph":{"title":"Extract Emails Online - Email Finder","description":"Find and extract all email addresses from any text content."}},"ui":{"extractBtn":"Extract Emails","foundCount":"Found {count} unique emails"},"guide":{"title":"How to Use","items":["Paste text containing email addresses.","Click 'Extract Emails'.","Get a clean list of unique email addresses found."]},"knowledge":{"title":"Email Extraction","items":[{"title":"Pattern Matching","content":"Uses regular expressions to identify standard email formats within unstructured text."}]}},"textToNato":{"title":"Text to NATO Phonetic Alphabet","description":"Convert text to NATO spelling.","ui":{"convertBtn":"Convert to NATO"},"guide":{"title":"How to Use","items":["Enter text.","Get phonetic spelling."]},"knowledge":{"title":"NATO Alphabet","items":[{"title":"Usage","content":"Used in aviation and military for clarity."}]}},"regexTester":{"title":"Regex Tester","description":"Test your regular expressions.","ui":{"testBtn":"Test Regex","pattern":"Pattern","flags":"Flags","testString":"Test String"},"guide":{"title":"How to Use","items":["Enter regex pattern.","Enter test string.","See matches."]},"knowledge":{"title":"Regex","items":[{"title":"Regular Expression","content":"Sequence of characters specifying a search pattern."}]}},"regexEscape":{"title":"Regex Escape Tool","description":"Escape special characters for regex.","ui":{"escapeBtn":"Escape Characters"},"guide":{"title":"How to Use","items":["Enter text.","Click Escape.","Copy safe string."]},"knowledge":{"title":"Escaping","items":[{"title":"Special Chars","content":"Characters like . * + ? need escaping with backslash."}]}},"markdownPreview":{"title":"Markdown Preview","description":"Write and preview Markdown.","ui":{"preview":"Preview"},"guide":{"title":"How to Use","items":["Write Markdown on left.","See HTML preview on right."]},"knowledge":{"title":"Markdown","items":[{"title":"Syntax","content":"Lightweight markup language."}]}},"binaryTextConverter":{"title":"Binary <-> Text Converter","description":"Convert between text and binary code.","convert":{"toBinary":"To Binary","toText":"To Text","swap":"Swap","inputPlaceholder":"Enter content here...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"How to Use","items":["Enter text or binary in the input box.","Click 'To Binary' to convert text to binary.","Click 'To Text' to convert binary to text.","Use 'Swap' to switch input and output."]},"knowledge":{"title":"About Binary","items":[{"title":"Binary","content":"Base-2 number system using 0 and 1."},{"title":"Encoding","content":"Characters are represented by unique binary sequences (ASCII/Unicode)."}]}},"markdownHtmlConverter":{"title":"Markdown <-> HTML Converter","description":"Convert between Markdown and HTML.","convert":{"toMarkdown":"To Markdown","toHtml":"To HTML","swap":"Swap","inputPlaceholder":"Enter HTML or Markdown here...","outputPlaceholder":"Conversion result..."},"guide":{"title":"How to Use","items":["Paste your content.","Click 'To Markdown' to convert HTML to Markdown.","Click 'To HTML' to convert Markdown to HTML.","Use 'Swap' to reverse the operation."]},"knowledge":{"title":"About Formats","items":[{"title":"Markdown","content":"Lightweight markup language."},{"title":"HTML","content":"Standard markup language for documents designed to be displayed in a web browser."}]}}}},"time":{"converter":{"title":"Time/Timestamp Converter","description":"Time stamp conversion, timezone conversion, and common time format tools","currentTimestamp":{"seconds":"Current Timestamp (seconds)","milliseconds":"Current Timestamp (milliseconds)"},"getCurrentTime":"Get Current Time","inputPlaceholder":"Enter timestamp or datetime string","invalidTime":"Invalid time format","processingError":"Error occurred during processing","timezoneConversion":"Timezone Conversion","selectTimezone":"Select Timezone","currentTime":"Current Time","formats":{"timestamp":"Unix Timestamp (seconds)","timestampMs":"Unix Timestamp (milliseconds)","iso8601":"ISO 8601","date":"Date","datetime":"Date Time","rfc2822":"RFC 2822","dayOfYear":"Day of Year","dayOfYearTemplate":"Day {day} of {total}","weekOfYear":"Week of Year","weekOfYearTemplate":"Week {week} of {total}"},"timezones":{"utc":"UTC","shanghai":"Shanghai (UTC+8)","hongKong":"Hong Kong (UTC+8)","taipei":"Taipei (UTC+8)","tokyo":"Tokyo (UTC+9)","seoul":"Seoul (UTC+9)","singapore":"Singapore (UTC+8)","bangkok":"Bangkok (UTC+7)","manila":"Manila (UTC+8)","jakarta":"Jakarta (UTC+7)","dubai":"Dubai (UTC+4)","kolkata":"Kolkata (UTC+5:30)","tehran":"Tehran (UTC+3:30)","london":"London (UTC+0/1)","paris":"Paris (UTC+1/2)","berlin":"Berlin (UTC+1/2)","madrid":"Madrid (UTC+1/2)","rome":"Rome (UTC+1/2)","moscow":"Moscow (UTC+3)","amsterdam":"Amsterdam (UTC+1/2)","stockholm":"Stockholm (UTC+1/2)","istanbul":"Istanbul (UTC+3)","newYork":"New York (UTC-4/5)","losAngeles":"Los Angeles (UTC-7/8)","chicago":"Chicago (UTC-5/6)","toronto":"Toronto (UTC-4/5)","vancouver":"Vancouver (UTC-7/8)","mexicoCity":"Mexico City (UTC-6)","saoPaulo":"Sao Paulo (UTC-3)","buenosAires":"Buenos Aires (UTC-3)","sydney":"Sydney (UTC+10/11)","melbourne":"Melbourne (UTC+10/11)","perth":"Perth (UTC+8)","auckland":"Auckland (UTC+12/13)","cairo":"Cairo (UTC+2)","johannesburg":"Johannesburg (UTC+2)","lagos":"Lagos (UTC+1)","nairobi":"Nairobi (UTC+3)"},"knowledge":{"title":"Time Conversion Knowledge","items":[{"title":"Unix Timestamp","content":"Unix timestamp represents seconds elapsed since January 1, 1970 (UTC/GMT midnight), excluding leap seconds. Common formats include seconds (10 digits) and milliseconds (13 digits)."},{"title":"ISO 8601","content":"ISO 8601 is the international standard for date and time representation, formatted as YYYY-MM-DDThh:mm:ss.sssZ. 'T' marks the start of time, 'Z' indicates UTC timezone, or +/-HH:mm for other zones."},{"title":"RFC 2822","content":"RFC 2822 is the time format specified in Internet email standards, e.g., Tue, 01 Jan 2024 12:00:00 +0800. This format is widely used in emails and RSS feeds."},{"title":"Coordinated Universal Time (UTC)","content":"UTC is the primary time standard, based on atomic clocks and Earth's rotation. It's unaffected by daylight saving time and serves as a stable time reference. GMT is practically synonymous with UTC."},{"title":"Time Zones","content":"Time zones are regions using the same time standard. They're typically expressed as UTC offsets, like UTC+8 (Beijing time). A zone's offset may vary seasonally due to daylight saving time."},{"title":"Daylight Saving Time (DST)","content":"DST involves advancing clocks by one hour during certain dates. Implementation varies by country, and some regions (like China) don't use it at all. This adds complexity to time conversions."},{"title":"Julian Date and Modified Julian Date","content":"Julian Date (JD) is used in astronomy, counting from 4713 BCE. Modified Julian Date (MJD) is a simplified version starting from November 17, 1858, equal to JD-2400000.5."},{"title":"Leap Seconds","content":"Leap seconds adjust UTC to account for irregular changes in Earth's rotation. They can be positive (23:59:60) or negative (skipping 23:59:59). The last leap second adjustment was on December 31, 2016."}]}},"satellite":{"title":"Satellite Time System Converter","enterUnixTime":"Enter UTC time (timestamp/datetime)","currentUTCTime":"Current UTC Time","currentLocalTime":"Current Local Time","gpsTime":"GPS Time","gpsWeek":"GPS Week","gpsSeconds":"Seconds of Week","enterGPSWeek":"Enter GPS week number","enterGPSSeconds":"Enter seconds of week","gpsResults":"GPS Time System Results","utcTime":"UTC Time","gpsZcount":"GPS Z-count","gpsBasicInfo":"GPS Basic Info","gpsTOW":"GPS Time of Week (TOW)","towDecimal":"TOW (Decimal)","towHMS":"TOW (HH:MM:SS)","gpsDateFormats":"GPS Date Formats","yearDoy":"Year-Day of Year","mjd":"Modified Julian Date","gpsISOFormat":"GPS ISO Format","invalidTimestamp":"Invalid time format","invalidGPSTime":"Invalid GPS time","invalidGPSSeconds":"Seconds must be between 0 and 604799","processingError":"Error occurred during processing","inputPlaceholder":"Enter Unix time, timestamp or datetime (e.g., 1704067200, 2024-01-01, 2024-01-01 12:00:00)","enterTOW":"Enter Time of Week (decimal allowed)","invalidTOW":"Invalid TOW, must be between 0 and 604800","gpsInputTitle":"GPS Time Input","gpsInputDesc":"Enter GPS week number and time-of-week seconds, or directly enter time-of-week (TOW)","bdsInputTitle":"BeiDou Time Input","bdsInputDesc":"Enter BeiDou week number and time-of-week seconds, or directly enter time-of-week (TOW)","inputModeUTC":"UTC Time Input","inputModeGPS":"GPS Time Input","inputModeBDS":"BeiDou Time Input","switchMode":"Switch Input Mode","convertToUTC":"Convert to UTC Time","convertToGPS":"Convert to GPS Time","convertToBDS":"Convert to BeiDou Time","bdsResults":"BeiDou Time System Results","bdsBasicInfo":"BeiDou Basic Info","bdsWeek":"BeiDou Week","bdsSeconds":"Seconds of Week","bdsTOW":"BeiDou Time of Week (TOW)","bdsDateFormats":"BeiDou Date Formats","bdsISOFormat":"BeiDou ISO Format","enterBDSWeek":"Enter BeiDou week number","enterBDSSeconds":"Enter seconds of week","enterBDSTOW":"Enter Time of Week (decimal allowed)","invalidBDSTime":"Invalid BeiDou time","invalidBDSSeconds":"Seconds must be between 0 and 604800","invalidBDSTOW":"Invalid Time of Week","dateTime":"Date Time","bdsTime":"BeiDou Time","utcOffset":"UTC Offset","seconds":"seconds","noOffset":"No offset (synchronized with UTC)","leapSecondsNote":"GPS time is 18 seconds ahead of UTC (as of 2024)","bdsTimeNote":"BeiDou time is synchronized with UTC","knowledge":{"title":"Satellite Time System Knowledge","items":[{"title":"GPS Time System (GPST)","content":"GPS time started from January 6, 1980 00:00:00 UTC. It's a continuous time scale that doesn't account for Earth's rotation irregularities or leap seconds. As of 2024, GPS time is 18 seconds ahead of UTC."},{"title":"BeiDou Time System (BDT)","content":"BeiDou time started from January 1, 2006 00:00:00 UTC. BDT is synchronized with UTC but doesn't include leap seconds. BDT = UTC + 0."},{"title":"GPS Week Number","content":"GPS time is expressed in weeks and seconds of week. One week = 7 days = 604800 seconds. Week numbers start from 0 and roll over every 1024 weeks. First rollover occurred on August 21, 1999 23:59:47 UTC."},{"title":"BeiDou Week Number","content":"Similar to GPS, BDS uses week numbers and seconds of week. Counting started from 2006, with 604800 seconds per week. Due to its later start date, no week number rollover has occurred yet."},{"title":"Leap Seconds","content":"Leap seconds reconcile atomic time with Earth's rotation. GPS accumulates the difference without using leap seconds, while BDS handles them through system time synchronization."},{"title":"Time Formats","content":"Both systems support multiple time formats: week+seconds, day of year, Modified Julian Date (MJD), etc. Day of year counts from day 1 of each year, range 1-366."}]}},"utcToGps":{"title":"UTC to GPS Time Converter | Unix Timestamp to GPS Week & Seconds","relatedTools":"Related Conversion Tools","fullFunction":"Full Function Converter","gpsToUtc":"GPS → UTC","utcToBds":"UTC → BeiDou","gpsVsBds":"GPS vs BeiDou","utcTimeInput":"UTC Time Input","useCurrentTime":"Use Current Time","inputPlaceholder":"Enter Unix timestamp, millisecond timestamp or datetime (e.g., 1704067200, 2024-01-01, 2024-01-01 12:00:00)","supportedFormats":"Supported Formats:","unixSeconds":"Unix timestamp (seconds): 1704067200","unixMillis":"Unix timestamp (milliseconds): 1704067200000","dateOnly":"Date: 2024-01-01","dateTime":"Date time: 2024-01-01 12:00:00","currentDisplay":"Current Display:","utcTime":"UTC","localTime":"Local","invalidTimeFormat":"Invalid time format","processingError":"Error occurred during processing","gpsConversionResult":"GPS Time Conversion Result","gpsBasicInfo":"GPS Basic Information","gpsWeek":"GPS Week","weekSeconds":"Time of Week Seconds","zCount":"Z Count","timeFormat":"Time Format","towDecimal":"TOW (Decimal)","towHMS":"TOW (HH:MM:SS)","dayOfYear":"Day of Year","scientificFormat":"Scientific Format","modifiedJulianDay":"Modified Julian Day","isoFormat":"ISO Format","leapSecondOffset":"Leap Second Offset","timeComparison":"Time Comparison","gpsTime":"GPS Time","leapSecondNote":"GPS time is {seconds} seconds ahead of UTC time (as of 2024)","usageGuide":"UTC to GPS Time Usage Guide","mainPurpose":"Main Purpose","gpsDevDevelopment":"GPS device development and testing","satelliteDataProcessing":"Satellite navigation data processing","gnssReceiverSync":"GNSS receiver time synchronization","surveyTimeUnification":"Surveying engineering time unification","aerospaceTimePlanning":"Aerospace time planning","functionFeatures":"Function Features","multiFormatSupport":"Support multiple UTC time input formats","autoLeapSecondCalc":"Automatic leap second offset calculation","weekSecondsOutput":"Provide GPS week number and time-of-week seconds","completeTimeFormat":"Include complete time format output","oneClickCopy":"One-click copy conversion results","technicalSpecs":"Technical Specifications","gpsEpoch":"GPS epoch time: January 6, 1980","noLeapSeconds":"GPS time does not consider leap seconds","weekSecondsDuration":"604800 seconds per week (7×24×3600)","zCountUnit":"Z count unit is 1.5 seconds","millisecondPrecision":"Support millisecond precision calculation","usageTips":"Usage Tips","directTimestampPaste":"Can directly paste Unix timestamp","autoDateTimeRecognition":"Support automatic datetime recognition","directGpsUse":"Results can be directly used for GPS devices","batchProcessing":"Suitable for batch data processing","mobileFriendly":"Mobile-friendly operation","secondsUnit":"seconds"},"calculator":{"title":"Time Calculator","dateInterval":{"title":"Date Interval Calculator","startDate":"Start Date","endDate":"End Date","includeEndDate":"Include End Date","excludeEndDate":"Exclude End Date","totalDays":"Total Days","workDays":"Working Days","weeks":"Weeks","detail":"Total {total} days ({years} years {months} months {days} days)","yearPart":"{years} years","monthPart":"{months} months","dayPart":"{days} days","sameDay":"Same Day","totalDaysPart":"(Total {total} days)","noDateSelected":"Please select start and end dates"},"timeArithmetic":{"title":"Time Arithmetic","baseDate":"Base Date","useCurrentTime":"Use Current Time","units":{"year":"Years","month":"Months","week":"Weeks","day":"Days","hour":"Hours","minute":"Minutes","second":"Seconds"},"result":"Result","resultDateTime":"Date Time","resultTimestamp":"Timestamp"},"knowledge":{"title":"Instructions and Related Knowledge","dateInterval":{"title":"Date Interval Calculation","point1":"Calculate intervals between two dates, including years, months, days, weeks, and working days","point2":"Option to include or exclude end date, affecting the final calculation","point3":"Working days calculation excludes Saturdays and Sundays by default","point4":"Detailed results show specific distribution of years, months, and days"},"timeArithmetic":{"title":"Time Arithmetic","point1":"Supports addition and subtraction of date/time including years, months, weeks, days, hours, minutes, seconds","point2":"Negative numbers can be used for backward time calculation","point3":"Month calculations automatically handle differences in days between months","point4":"Supports viewing results in timestamp format"}}},"batch":{"title":"Batch Time Format Processing","description":"Batch time format conversion and data import/export tool","input":{"title":"Input Data","format":"Input Format","direct":"Direct Input","directHint":"Enter or paste multiple lines of time data below","file":"File Upload","fileInfo":"File: {name} (Total: {total} rows, Preview: {preview} rows)","preview":"Preview file: {name}","more":"{count} more rows not shown","placeholder":"Enter one time per line\nExample:\n1699686684\n2023-11-11 12:34:56\n2023-11-11T12:34:56Z"},"output":{"title":"Conversion Result","format":"Output Format","copy":"Copy Result"},"formats":{"timestamp":"Timestamp (seconds)","timestampMs":"Timestamp (milliseconds)","datetime":"DateTime (YYYY-MM-DD HH:mm:ss)","date":"Date (YYYY-MM-DD)","iso8601":"ISO8601 Format"},"convert":{"start":"Start Convert","clear":"Clear"},"errors":{"noInput":"Please enter time data to convert","invalidInput":"Invalid format","conversionFailed":"Conversion failed","copyFailed":"Copy failed"},"success":{"converted":"Successfully converted {count} items","cleared":"Data cleared","copied":"Copied to clipboard"},"timeCalc":{"enable":"Enable Time Calculation","add":"Add","subtract":"Subtract","units":{"years":"Years","months":"Months","days":"Days","hours":"Hours","minutes":"Minutes","seconds":"Seconds"}},"upload":{"button":"Upload File","hint":"Supports text files, CSV, Excel files (.txt, .csv, .xlsx, .xls)","success":"File {name} uploaded successfully, total {total} rows","error":"File processing failed"},"export":{"button":"Export File","success":"File exported successfully","error":"File export failed","noData":"No data to export"},"knowledge":{"title":"Instructions","basic":{"title":"Basic Features","point1":"Supports conversion between various time formats, including timestamps and datetime","point2":"Input directly in the text box or import files in batch","point3":"Conversion results can be copied or exported to files"},"file":{"title":"File Processing","point1":"Supports TXT, CSV, and Excel file import/export","point2":"File processing is done locally in the browser for data security","point3":"Maintains original file format and ensures time formats are not auto-converted"},"timeCalc":{"title":"Time Calculation","point1":"Perform addition or subtraction operations on converted times","point2":"Supports multiple time units: years, months, weeks, days, hours, minutes, seconds","point3":"Calculations are performed during conversion, maintaining the output format"}}},"cron":{"title":"Cron Expression Generator","cronType":{"label":"Cron Type","linux":"Linux Cron","spring":"Spring Cron","quartz":"Quartz Cron"},"fields":{"placeholder":{"specific":"Please select specific values","start":"Start value","end":"End value","interval":"Interval"},"interval":{"from":"From","every":"Every","fromMin":"Start from minimum value","fromSpecific":"Start from specific value"},"second":{"label":"Second","unit":"second","every":"Every second","specific":"Specific seconds","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Second {value}","specificMultiple":"Seconds {values}","range":"From second {start} to {end}","everyInterval":"Every {n} seconds","fromInterval":"Starting from second {start}, every {n} seconds"},"minute":{"label":"Minute","unit":"minute","every":"Every minute","specific":"Specific minutes","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Minute {value}","specificMultiple":"Minutes {values}","range":"From minute {start} to {end}","everyInterval":"Every {n} minutes","fromInterval":"Starting from minute {start}, every {n} minutes"},"hour":{"label":"Hour","unit":"hour","every":"Every hour","specific":"Specific hours","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Hour {value}","specificMultiple":"Hours {values}","range":"From hour {start} to {end}","everyInterval":"Every {n} hours","fromInterval":"Starting from hour {start}, every {n} hours"},"day":{"label":"Day","unit":"day","every":"Every day","specific":"Specific days","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Day {value}","specificMultiple":"Days {values}","range":"From day {start} to {end}","everyInterval":"Every {n} days","fromInterval":"Starting from day {start}, every {n} days","last":"Last day of the month (L)","weekday":"Nearest weekday (W)","lastDay":"Will execute on the last day of the month","workday":"Nearest workday","workdayDescription":"Select a date, the expression will trigger on the nearest weekday (Monday to Friday)","nearestWorkday":"Specific date","workdayRange":"(1-31)"},"month":{"label":"Month","unit":"month","every":"Every month","specific":"Specific months","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Month {value}","specificMultiple":"Months {values}","range":"From month {start} to {end}","everyInterval":"Every {n} months","fromInterval":"Starting from month {start}, every {n} months","values":{"1":"January","2":"February","3":"March","4":"April","5":"May","6":"June","7":"July","8":"August","9":"September","10":"October","11":"November","12":"December"}},"week":{"label":"Week","unit":"week","every":"Every week","specific":"Specific weeks","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"{value}","specificMultiple":"{values}","range":"From {start} to {end}","everyInterval":"Every {n} weeks","fromInterval":"Starting from {start}, every {n} weeks","values":{"0":"Sunday","1":"Monday","2":"Tuesday","3":"Wednesday","4":"Thursday","5":"Friday","6":"Saturday","7":"Sunday"},"last":"Last weekday of the month (L)","lastWeekday":"Select weekday","nth":"The","nthWeekday":"th weekday","nthDescription":"Select the nth weekday of the month"},"year":{"label":"Year","unit":"year","every":"Every year","specific":"Specific years","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Year {value}","specificMultiple":"Years {values}","range":"From year {start} to {end}","everyInterval":"Every {n} years","fromInterval":"Starting from year {start}, every {n} years"}},"validation":{"invalidValue":"{field} value must be between {min} and {max}","invalidValues":"{field} contains invalid values: {values}","endGreaterThanStart":"End value must be greater than start value","intervalGreaterThanZero":"Interval value must be greater than 0","dayOfMonthInvalid":"This date does not exist in the month","invalidWeekDay":"Invalid weekday value","weekDayLinux":"In Linux Cron, weekday can only use 0-6 (0 represents Sunday)","weekDaySpringQuartz":"In Spring/Quartz Cron, it's recommended to use 1-7 (7 represents Sunday) instead of 0-6","yearIntervalPositive":"Year interval must be greater than 0","invalidNthDay":"Can only select the 1st to 5th weekday","dayWeekBothNoSpecific":"Day and weekday fields cannot both use ?"},"preview":{"expression":"Expression","meaning":"Meaning","nextExecutions":"Preview","noPreview":"Unable to preview execution times","invalidExpression":"Invalid expression","parseError":"Parse error"},"templates":{"title":"Common Templates","items":{"every5Minutes":"Execute every 5 minutes","everyDayAt5":"Execute at 5:00 every day","everySaturdayAt1":"Execute at 1:00 AM every Saturday","workdaysAt1015":"Trigger at 10:15 AM Monday through Friday","everyMinuteAt10":"Trigger every minute between 10:00 AM and 10:59 AM","threeTimes":"Execute at 10:00 AM, 2:00 PM, and 4:00 PM daily","workingHours":"Every half hour during working hours (9 AM to 5 PM)","15thAt1015":"Trigger at 10:15 AM on the 15th of every month","everyDayAt23":"Execute once at 23:00 every day"}},"instructions":{"title":"Instructions","description":"The Cron Expression Generator helps you create execution schedules for scheduled tasks.","steps":["Select Cron type (Linux, Spring, or Quartz)","Set values for each time field","View the generated expression and preview","Use common templates to quickly generate expressions"]},"algorithms":{"Linux Cron":"Standard Linux Cron expression with five fields: minute, hour, day, month, and weekday","Spring Cron":"Spring framework Cron expression with an additional seconds field, total six fields","Quartz Cron":"Quartz scheduler Cron expression with year field support, total seven fields"},"otherAlgorithms":"Other Cron Types","knowledge":{"title":"Cron Expression Explained","basics":{"title":"Basic Format","description":"A Cron expression is a string consisting of 5-7 fields separated by spaces.","table":{"headers":["Field","Description","Required","Allowed Values","Examples"],"rows":[{"field":"Second","description":"Second within a minute","required":"Spring/Quartz","range":"0-59","examples":"0, 30, */5"},{"field":"Minute","description":"Minute within an hour","required":"Yes","range":"0-59","examples":"0, 15, */15"},{"field":"Hour","description":"Hour within a day","required":"Yes","range":"0-23","examples":"0, 12, */2"},{"field":"Day","description":"Day within a month","required":"Yes","range":"1-31","examples":"1, 15, L"},{"field":"Month","description":"Month within a year","required":"Yes","range":"1-12","examples":"1, 6, *"},{"field":"Week","description":"Day of week","required":"Yes","range":"0-7","examples":"1, MON, *"},{"field":"Year","description":"Specific year","required":"Optional in Quartz","range":"1970-2099","examples":"2024, *"}]}},"specialChars":{"title":"Special Characters","table":{"headers":["Character","Description","Example"],"rows":[{"char":"*","description":"Represents all possible values","example":"In the hour field, * means every hour"},{"char":",","description":"Used to list multiple values","example":"In the minute field, 1,15,30 means minutes 1, 15, and 30"},{"char":"-","description":"Represents a range","example":"In the hour field, 9-17 means from 9 AM to 5 PM"},{"char":"/","description":"Represents increment values","example":"In the minute field, 0/15 means every 15 minutes"},{"char":"L","description":"In the day field, means the last day of the month; in the week field, means 7 or SAT","example":"In the day field, L means the last day"},{"char":"W","description":"Represents the nearest workday","example":"15W means the nearest workday to the 15th"},{"char":"#","description":"Used to specify the nth weekday of the month","example":"6#3 means the third Friday"},{"char":"?","description":"Can only be used in 'Day' and 'Week' fields. Since 'Day' and 'Week' affect each other, when one is specified, the other must use '?' as a placeholder. For example, when specifying execution on the 15th of each month, the 'Week' field must use '?'; when specifying execution every Monday, the 'Day' field must use '?'","example":"0 0 12 15 * ? means execute at 12:00 on the 15th of each month; 0 0 12 ? * MON means execute at 12:00 every Monday"}]}},"differences":{"title":"Differences Between Types","items":[{"type":"Linux Cron","description":"The most basic Cron expression format, containing 5 fields.","features":["Does not support second-level scheduling","Week field uses 0-6 to represent Sunday to Saturday","Does not support year field","Supports basic special characters: *, /, -"]},{"type":"Spring Cron","description":"A simplified version based on Quartz, containing 6 fields.","features":["Supports second-level scheduling","Week field can use 1-7 or SUN-SAT","Does not support year field","Supports special characters like L, W, #"]},{"type":"Quartz Cron","description":"The most complete version, containing 7 fields.","features":["Supports second-level scheduling","Supports year field","Week field can use 1-7 or SUN-SAT","Supports all special characters: L, W, #, ?"]}]},"notes":{"title":"Important Notes","items":["When both day and week fields are specified, note that they have an 'OR' relationship","When using special characters, be aware of compatibility between different Cron types","When setting specific times, it's recommended to set unused fields to *","When using ranges, ensure the start value is less than the end value","When using steps, ensure they don't exceed the field's valid range","Month and weekday value ranges may differ between different types","It's recommended to thoroughly test in important production environments"]}},"guide":{"title":"GCM Mode Guide","description":"When decrypting external GCM encrypted data, you need all of the following information:","authTagMode":{"title":"Authentication Tag Processing Mode","auto":"Authentication tag is appended to ciphertext, suitable when interoperating with Java APIs where tag is included at the end of ciphertext"},"steps":{"title":"Information required for decryption","key":"Key: The original key used for encryption","nonce":"Nonce: The original 12-byte random value used for encryption","authTag":"Authentication Tag: The 16-byte tag generated during encryption, correct tag must be provided to decrypt","aad":"Additional Authenticated Data (optional): If AAD was used in encryption, the same value must be provided","ciphertext":"Ciphertext: The encrypted data to decrypt"}}},"julianDate":{"shortTitle":"Julian Date","description":"Convert between Julian Date (JD, MJD) and local dates"},"excelDate":{"shortTitle":"Excel Date","description":"Convert Excel serial dates to standard dates"},"windowsFiletime":{"shortTitle":"Windows FILETIME","description":"Convert Windows FILETIME (1601 epoch) to dates"},"ntpTimestamp":{"shortTitle":"NTP Timestamp","description":"Convert NTP timestamps (1900 epoch) to dates"},"leapYearChecker":{"shortTitle":"Leap Year Checker","description":"Check if a specific year is a leap year"},"ageCalculator":{"shortTitle":"Age Calculator","description":"Calculate exact age in years, months, and days"}},"tint-shade":{"title":"Tint & Shade Generator","description":"Generate a series of lighter tints and darker shades from a base color.","baseColor":"Base Color","tints":"Tints","shades":"Shades","steps":"Steps","guide":{"title":"Usage Guide","items":["Select a base color.","Tints are generated by mixing the base color with white.","Shades are generated by mixing the base color with black.","Click on any color box to quickly copy its code."]},"knowledge":{"title":"Tints vs. Shades","items":[{"title":"Tints","content":"Adding white to a pure color to increase its lightness."},{"title":"Shades","content":"Adding black to a pure color to decrease its lightness."}]}},"toast":{"error":"Error","success":"Success","warning":"Warning","info":"Info"},"triangleCalculator":{"title":"Triangle Calculator","description":"Calculate area and perimeter of a triangle given base and height, or three sides.","keywords":"triangle calculator, area of triangle, perimeter of triangle, heron's formula","category":"Math","mode":"Calculation Mode","modeBaseHeight":"Base & Height","modeSides":"Three Sides (SSS)","base":"Base (b)","height":"Height (h)","sideA":"Side A","sideB":"Side B","sideC":"Side C","calculate":"Calculate","result":"Results","area":"Area","perimeter":"Perimeter","clear":"Clear","guide":{"title":"How to Use","items":["Select the calculation mode.","Enter the required values.","Click 'Calculate' to see Area and Perimeter."]},"knowledge":{"title":"About Triangles","introduction":"A triangle is a polygon with three edges and three vertices.","items":[{"title":"Formulas","content":"Area = 0.5 * base * height\nPerimeter = a + b + c\nHeron's Formula: Area = √(s(s-a)(s-b)(s-c)), where s is semi-perimeter"}],"featuresTitle":"Features","features":["Support for different input methods","Heron's formula implementation"],"applicationsTitle":"Applications","applications":["Geometry","Construction","Surveying"]}},"twofish":{"title":"Twofish Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"16/24/32 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - Electronic Codebook","cbc":"CBC - Cipher Block Chaining","cfb":"CFB - Cipher Feedback","ofb":"OFB - Output Feedback","ctr":"CTR - Counter","gcm":"GCM - Galois/Counter Mode"},"padding":{"title":"Padding Mode","pkcs7":"PKCS#7 Padding","iso97971":"ISO/IEC 9797-1 Padding","ansix923":"ANSI X.923 Padding","iso10126":"ISO 10126 Padding","zeropadding":"Zero Padding","nopadding":"No Padding"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter 16 bytes IV text","hex":"Enter 32 digits hex IV"},"generate":"Generate Random IV","error":"Invalid IV length","positionTitle":"IV Position","positionDesc":"Choose how IV is handled with ciphertext","position":{"manual":"Manual - Provide IV separately","header":"Header - Automatically prepend/extract IV at beginning","footer":"Footer - Automatically append/extract IV at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"Twofish Knowledge","sections":[]}},"txtLookup":{"title":"TXT Record Lookup","description":"Find TXT records for a domain, often used for verification and email security (SPF, DMARC).","inputLabel":"Domain Name","inputPlaceholder":"example.com","buttonLabel":"Lookup TXT Records","resultLabel":"TXT Records","errorLabel":"Error","noRecords":"No TXT records found.","copy":"Copy","copied":"Copied"},"ulidGenerator":{"title":"ULID Generator","description":"Generate Universally Unique Lexicographically Sortable Identifiers.","configuration":"Configuration","count":"Count","timestamp":"Timestamp (Optional)","currentTimestampPlaceholder":"Leave empty for current time","options":"Options","uppercase":"Uppercase","generate":"Generate ULIDs","generatedUlids":"Generated ULIDs","firstUlidTime":"First ULID Timestamp","ulidSortableNote":"ULIDs are sortable by generation time","copy":"Copy","copied":"Copied!","guide":{"title":"How to use","items":["Adjust the number of ULIDs to generate.","Optionally select a specific timestamp to generate ULIDs for that time.","Toggle Uppercase option (standard ULID is uppercase).","Click 'Generate ULIDs' to create identifiers.","Copy the result to your clipboard."]},"knowledge":{"title":"About ULID","introduction":"ULID (Universally Unique Lexicographically Sortable Identifier) is designed to be a better UUID.","items":[{"title":"Sortable","content":"The leading characters are encoded from a timestamp, so ULIDs generated later sort after those generated earlier."},{"title":"URL Safe","content":"Uses Crockford's Base32 alphabet for better readability and URL safety."},{"title":"No Collisions","content":"Includes 80 bits of randomness to ensure uniqueness even within the same millisecond."}]}},"unicodeEncoder":{"convert":{"title":"Unicode Encode/Decode","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to convert...","outputPlaceholder":"Result will be displayed here...","encodeFormat":"Encoding Format","formats":{"escape":"JavaScript Escape (\\uXXXX)","codepoint":"Code Point (U+XXXX)","html":"HTML Entity (&#xXXXX;)"}},"guide":{"title":"Instructions","items":["Enter text to convert to Unicode escape sequences or code points","Choose desired output format (JS Escape, Code Point, HTML Entity)","Use Decode to convert Unicode sequences back to text"]},"knowledge":{"title":"Unicode Knowledge","items":[{"title":"What is Unicode?","content":"Unicode is a universal character encoding standard that assigns a unique number to every character across languages and scripts."},{"title":"UTF-8 vs Unicode","content":"Unicode is the character set (mapping characters to numbers), while UTF-8 is an encoding (how those numbers are stored in bytes)."}],"featuresTitle":"Key Features","features":["Supports over 140,000 characters","Universal standard for text representation","Essential for internationalization"],"applicationsTitle":"Common Applications","applications":["Software localization","Cross-platform text exchange","Emoji support","Mathematical and scientific symbols"]}},"urlBuilder":{"title":"URL Builder","description":"Construct URLs by adding protocol, host, path, and query parameters.","inputs":{"protocol":"Protocol","host":"Host / Domain","path":"Path","params":"Query Parameters"},"params":{"key":"Key","value":"Value","add":"Add Parameter","remove":"Remove"},"results":{"title":"Built URL","copy":"Copy URL"},"guide":{"title":"How to use URL Builder","items":["Select the protocol (http or https).","Enter the host (e.g., example.com) and path (e.g., /api/data).","Add key-value pairs for query parameters.","The complete URL is automatically generated and can be copied."]},"knowledge":{"title":"URL Encoding","items":[{"title":"Percent-Encoding","content":"Special characters in URLs must be encoded. For example, a space becomes %20."},{"title":"Query Parameters","content":"Parameters are separated from the base URL by a question mark (?) and from each other by ampersands (&)."}],"featuresTitle":"Features","features":["Automatic URL encoding","Dynamic parameter management","Real-time preview"],"applicationsTitle":"Applications","applications":["API testing","Marketing link generation","Sharing deep links"]}},"urlEncoder":{"title":"URL Encoder / Decoder","description":"Professional online URL encoding and decoding tool. Supports UTF-8 character set, provides both component and URI encoding modes, and easily handles special characters and non-Latin scripts.","convert":{"title":"URL Converter","inputPlaceholder":"Enter text or URL to encode/decode...","outputPlaceholder":"Result will be shown here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","encodeMode":"Encoding Mode","encodeModes":{"component":"encodeURIComponent (Recommended for value)","uri":"encodeURI (For full URL)"}},"guide":{"title":"How to Use URL Encoder/Decoder","items":["**Select Action**: Click 'Encode' to convert special characters to percent coordinates, or 'Decode' to restore the original string.","**Understand Modes**: 'encodeURIComponent' encodes almost all non-alphanumeric characters, best for query parameter values; 'encodeURI' preserves URL syntax characters (like : / ? #), best for full URLs.","**Input Content**: Paste the text or URL you want to process in the left input box. Supports strings of any length.","**View Result**: The converted result will appear instantly in the right output box.","**Copy Result**: Click the copy button above the output box to copy the result to your clipboard.","**Swap & Clear**: Use the Swap button to quickly exchange input and output for continuous operations; use Clear to reset everything.","**Note**: When decoding, ensure the input format is correct. Invalid percent-encoding sequences (like %G0) may cause errors."]},"knowledge":{"title":"URL Encoding Deep Dive","items":[{"title":"What is URL Encoding (Percent-encoding)?","content":"URL encoding, officially known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI). Characters that are not allowed in a URL (like spaces or non-ASCII characters) must be translated into a format that can be transmitted over the Internet. It replaces unsafe ASCII characters with a '%' followed by two hexadecimal digits."},{"title":"Why is URL Encoding Necessary?","content":"URLs can only be sent over the Internet using the ASCII character-set. Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format. URL encoding replaces unsafe ASCII characters with a '%' followed by two hexadecimal digits. For example, a space is replaced by '%20'. This ensures no ambiguity in parsing the URL."},{"title":"UTF-8 and URL Encoding","content":"Modern web standards recommend using UTF-8 as the basis for URL encoding. In UTF-8, a non-ASCII character is converted into one or more bytes. Each of these bytes is then percent-encoded. For example, the character 'É' in UTF-8 is 0xC3 0x89, so it becomes '%C3%89'. This allows URLs to support characters from virtually all human languages."},{"title":"Common Character Encodings","content":"Space → %20 (or + in some contexts); Slash / → %2F; Colon : → %3A; Question mark ? → %3F; Equals = → %3D; Ampersand & → %26; Hash # → %23. Note that letters (A-Z, a-z), numbers (0-9), and a few symbols (- _ . ! ~ * ' ( )) are unreserved and do not need to be encoded."}],"featuresTitle":"Key Features","features":["**Dual Mode Support**: Provides both component and URI encoding modes to suit different needs.","**UTF-8 Ready**: Fully supports multi-byte characters, ensuring correct encoding for Chinese, Emoji, and other non-Latin scripts.","**Instant Processing**: Powered by client-side JavaScript, conversion happens instantly without sending data to a server.","**Privacy Focused**: Your data never leaves your browser, ensuring maximum privacy and security.","**Large Text Support**: Optimized performance allows for processing very large text blocks without lag."],"applicationsTitle":"Common Applications","applications":["**Web Development**: Essential for encoding query parameters in AJAX requests to prevent malformed URLs.","**Data Scraping**: Used to properly encode search terms or parameters when building URLs for web scrapers.","**API Testing**: Critical for sending data containing special characters (like / or &) in RESTful API paths or queries.","**File Downloads**: Ensures filenames with special characters or non-English text are correctly handled by browsers.","**Debugging**: Quickly decoding opaque URL strings in browser address bars to understand their contents."]}},"urlParser":{"title":"URL Parser","description":"Parse and analyze URLs into their components (protocol, host, path, query parameters).","input":{"label":"Enter URL","placeholder":"https://example.com:8080/path/to/resource?query=param#fragment","parse":"Parse URL"},"error":"Invalid URL. Please enter a valid URL including protocol (e.g., https://).","results":{"title":"URL Components","fullUrl":"Full URL","protocol":"Protocol","username":"Username","password":"Password","host":"Host/Hostname","port":"Port","path":"Path","query":"Query String","fragment":"Fragment/Hash","paramsTitle":"Query Parameters"},"guide":{"title":"How to use URL Parser","items":["Enter a complete URL in the input field.","Click 'Parse URL' or press Enter.","View the breakdown of the URL into its standard components.","Examine individual query parameters in the detailed table."]},"knowledge":{"title":"URL Structure","items":[{"title":"Protocol (Scheme)","content":"Indicates the protocol to be used, such as http, https, ftp, or mailto."},{"title":"Host (Domain)","content":"The domain name or IP address of the server hosting the resource."},{"title":"Path","content":"The specific location of the resource on the server."},{"title":"Query String","content":"Key-value pairs containing data to be passed to web applications."}],"featuresTitle":"Features","features":["Full component breakdown","Query parameter extraction","Support for complex URLs"],"applicationsTitle":"Applications","applications":["Debugging web applications","Analyzing tracking parameters","Security analysis"]}},"userAgentParser":{"title":"User Agent Parser","description":"Parse and analyze user agent strings to identify browser, operating system, and device details.","input":"User Agent String","inputPlaceholder":"Paste User Agent string here (or use current browser's)","useMyUa":"Use My User Agent","parse":"Parse","error":"Please enter a User Agent string.","results":{"title":"Parsed Information","browser":"Browser","os":"Operating System","device":"Device","cpu":"CPU Architecture","engine":"Browser Engine"},"guide":{"title":"How to use User Agent Parser","items":["Paste a User Agent string into the input field, or click 'Use My User Agent' to check your current browser.","Click the 'Parse' button.","View detailed breakdown of the browser, OS, device, and other properties."]},"knowledge":{"title":"About User Agents","items":[{"title":"What is a User Agent?","content":"A User Agent is a string of text that a web browser sends to a web server to identify itself. It contains information about the browser version, operating system, and device type."},{"title":"Usage","content":"User Agents are used for content negotiation, analytics, and serving device-specific content. However, they can be spoofed."}],"featuresTitle":"Features","features":["Browser identification","OS detection","Device type analysis"],"applicationsTitle":"Applications","applications":["Debugging browser issues","Analytics tracking","Security analysis"]}},"utf8Encoder":{"convert":{"title":"UTF-8 Encode/Decode","input":"Input","output":"Output","clear":"Clear","inputPlaceholder":"Enter text...","outputPlaceholder":"Result will be displayed here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap"},"guide":{"title":"Instructions","items":["Encode: Convert text to UTF-8 hex byte sequence","Decode: Convert UTF-8 hex byte sequence back to text","Delimiters are supported (space, 0x prefix, etc.)"]},"knowledge":{"title":"UTF-8 Knowledge","items":[{"title":"What is UTF-8?","content":"UTF-8 is a variable-width character encoding used for electronic communication. It uses 1 to 4 bytes to represent standard Unicode characters."},{"title":"Features","content":"Backwards compatible with ASCII. Efficient for Latin scripts. The dominant encoding for the World Wide Web."}],"featuresTitle":"Key Features","features":["Variable width (1-4 bytes)","Self-synchronizing","No endianness issues (byte order)"],"applicationsTitle":"Common Applications","applications":["Web pages (HTML5)","Database storage","Email transfer","API responses (JSON)"]}},"uuencodeEncoder":{"convert":{"title":"UUEncode Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","filename":"Filename","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"Instructions","items":["Encode text to UUEncode format","Decode UUEncode strings back to text","Output includes begin/end markers and filename"]},"knowledge":{"title":"UUEncode Knowledge","items":[{"title":"What is UUEncode?","content":"UUEncode (Unix-to-Unix Encoding) is a classic binary-to-text encoding format originally used to transfer files between Unix systems via email."},{"title":"Format Characteristics","content":"Each line begins with a length character followed by encoded data. Files start with 'begin permissions filename' and end with 'end'."}],"featuresTitle":"Key Features","features":["Includes filename and permission information","3 bytes to 4 character encoding","Maximum 45 bytes of data per line"],"applicationsTitle":"Common Applications","applications":["Legacy system file transfers","Usenet newsgroup attachments","Old mailing list attachments"]}},"uuidGenerator":{"title":"UUID Generator","description":"Generate bulk UUIDs (v1, v3, v4, v5) with customization options.","configuration":"Configuration","version":"Version","count":"Count","options":"Options","hyphens":"Hyphens","uppercase":"Uppercase","namespace":"Namespace (UUID)","name":"Name","generate":"Generate UUIDs","generatedUuids":"Generated UUIDs","copy":"Copy","copied":"Copied!","guide":{"title":"How to use","items":["Select UUID version (v4 random, v1 time-based, v3/v5 name-based).","For v3/v5, enter a Namespace UUID and a Name.","Adjust the number of UUIDs to generate.","Toggle Hyphens or Uppercase options as needed.","Click 'Generate UUIDs' to create new identifiers.","Use the Copy button to copy the list to clipboard."]},"knowledge":{"title":"About UUID","introduction":"UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems.","items":[{"title":"UUID v4 (Random)","content":"Generated using random numbers. The probability of collision is extremely low."},{"title":"UUID v1 (Time-based)","content":"Generated using the current time and MAC address. Guaranteed unique across space and time."},{"title":"UUID v3 (MD5) & v5 (SHA-1)","content":"Generated from a namespace and a name. Deterministic: same namespace + same name = same UUID."}]}},"varianceCalculator":{"title":"Variance Calculator","description":"Calculate the sample and population variance of a dataset.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 1.5, 2.5, 3.5, 4.5","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","sample":"Sample Variance","population":"Population Variance","guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate both sample and population variances.","The sample variance is used when your data is a sample of a larger population.","The population variance is used when your data represents the entire population."]},"knowledge":{"title":"About Variance","introduction":"Variance is the expectation of the squared deviation of a random variable from its population mean or sample mean. Variance is a measure of dispersion.","items":[{"title":"Definition","content":"It measures how far a set of numbers is spread out from their average value. It is the square of the standard deviation."},{"title":"Sample vs Population","content":"Sample Variance (s²): An estimate of the population variance. It divides the sum of squared differences by (n-1).\nPopulation Variance (σ²): The exact variance of an entire population. It divides the sum of squared differences by N."}],"featuresTitle":"Key Features","features":["Calculates both sample and population variances.","Supports floating-point numbers."],"applicationsTitle":"Applications","applications":["Statistical modeling.","Portfolio theory in finance.","Machine learning feature scaling."]}},"webpConverter":{"title":"WebP Converter","description":"Convert images to/from WebP format with quality control","uploadTitle":"Upload Image","resultTitle":"Converted Image","guide":{"title":"How to Use","items":["Upload any image file (PNG, JPG, or WebP)","For WebP input: converts to PNG output","For PNG/JPG input: converts to WebP output","Adjust quality slider for WebP compression","Click 'Convert' to process the image","Preview the result and download","WebP typically offers 25-35% smaller files than JPG"]},"knowledge":{"title":"About WebP Format","items":[{"title":"What is WebP?","content":"WebP is a modern image format developed by Google that provides superior lossless and lossy compression for images on the web. WebP images are typically 25-35% smaller than equivalent JPEG images and 26% smaller than PNG images, while maintaining comparable visual quality."},{"title":"WebP Advantages","content":"WebP supports both lossy and lossless compression, transparency (alpha channel), and animation. It offers significantly smaller file sizes compared to PNG and JPG, making it ideal for web optimization. Major browsers including Chrome, Firefox, Safari, and Edge all support WebP."},{"title":"Browser Compatibility","content":"WebP is now supported by all major modern browsers. However, some older applications and systems may not support WebP, which is why conversion to/from WebP is still useful. This tool helps you convert between WebP and universally supported formats."},{"title":"Client-Side Processing","content":"This converter processes images entirely in your browser using HTML5 Canvas API. No files are uploaded to any server, ensuring complete privacy and fast processing speeds."}],"featuresTitle":"Key Features","features":["Bidirectional conversion: to and from WebP","Adjustable quality for lossy WebP compression","Supports PNG, JPG, and WebP input formats","100% client-side processing for privacy"],"applicationsTitle":"Common Use Cases","applications":["Optimizing images for faster web page loading","Converting WebP images for use in older applications","Reducing storage costs with smaller image files","Preparing images for content delivery networks (CDNs)"]}},"weekNumber":{"title":"Week Number Calculator","description":"Find out the ISO week number for any date, or get dates for a specific week.","calculator":{"tabs":{"dateToWeek":"Date to Week","weekToDate":"Week to Date"},"inputs":{"date":"Select Date","year":"Year","week":"ISO Week Number (1-53)","currentTime":"Today"},"results":{"title":"Result","weekNumber":"ISO Week Number","year":"ISO Week-Numbering Year","weekString":"ISO Week String","totalWeeks":"Total weeks in this year","startDate":"Start of Week (Monday)","endDate":"End of Week (Sunday)","invalidWeek":"Invalid week number for the selected year.","weekOfMonth":"Week of Month","monthName":"Month"}},"knowledge":{"title":"About ISO Week Numbers","sections":[{"title":"What is an ISO Week?","content":"The ISO 8601 data elements standard specifies a week-numbering system. Weeks start on Monday. The first week of a year is the week that contains the first Thursday of the year."},{"title":"Week 1","content":"Week 1 of any year is the week containing January 4th. This means that sometimes, the first few days of January might belong to the last week (Week 52 or 53) of the previous year."},{"title":"52 or 53 Weeks?","content":"Most years have 52 weeks. A year has 53 weeks if January 1st falls on a Thursday, or if it's a leap year and January 1st falls on a Wednesday."}]}},"whois":{"title":"Whois Lookup","description":"Retrieve domain registration details, including registrar, expiry date, and contact info.","input":"Domain Name","inputPlaceholder":"Enter a domain (e.g., google.com)","lookup":"Lookup","loading":"Querying WHOIS...","error":"Failed to retrieve WHOIS data. Please check the domain and try again.","rawOutput":"Raw Output","guide":{"title":"How to use Whois Lookup","items":["Enter a domain name (e.g., example.com) in the input field.","Click the 'Lookup' button.","Review the domain registration details, creation date, expiry date, and registrar information."]},"knowledge":{"title":"About WHOIS","items":[{"title":"What is WHOIS?","content":"WHOIS is a query and response protocol that is used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name or an IP address block."},{"title":"Privacy","content":"Many domain owners use privacy protection services to redact their personal contact information from public WHOIS records."}],"featuresTitle":"Features","features":["Real-time WHOIS database query","Support for most TLDs (Top-Level Domains)","Displays raw WHOIS data for full transparency","Simple and fast interface"],"applicationsTitle":"Applications","applications":["Checking domain availability and expiry","Identifying domain registrars","Investigating domain ownership for legal or security reasons","Network administration"]}},"windowsFiletime":{"title":"Windows FILETIME Converter","description":"Convert Windows FILETIME (100-nanosecond intervals since January 1, 1601) to standard date/time and vice versa.","inputTypeSelection":"Conversion Direction","typeFiletimeToDate":"FILETIME to Date","typeDateToFiletime":"Date to FILETIME","inputFiletimeLabel":"Windows FILETIME","inputFiletimePlaceholder":"e.g., 133221980000000000","inputDateLabel":"Local Date & Time","inputDatePlaceholder":"Select date and time","formatHexTitle":"Format","formatHex":"Hexadecimal (e.g., 0x1D94C43CA9B2A80)","formatDecimal":"Decimal (e.g., 133221980000000000)","convertBtn":"Convert","resultTitle":"Conversion Result","resultFiletimeDec":"FILETIME (Decimal)","resultFiletimeHex":"FILETIME (Hex)","resultUtc":"UTC Time","resultLocal":"Local Time","copySuccess":"Copied successfully","clearForm":"Clear","now":"Current Time","aboutTitle":"About Windows FILETIME","aboutContent":"A Windows FILETIME is a 64-bit value that represents the number of 100-nanosecond intervals that have elapsed since 12:00 A.M. January 1, 1601 Coordinated Universal Time (UTC). This epoch date corresponds to the start of the 400-year Gregorian calendar cycle when the calendar was first adopted. It is commonly used in Windows APIs, Active Directory, and NTFS file systems.","errorInvalidFiletime":"Please enter a valid Windows FILETIME value","errorInvalidDate":"Please select a valid date and time","guide":{"title":"How to Use","items":["Select the conversion direction: 'FILETIME → Date' to decode a Windows FILETIME value, or 'Date → FILETIME' to get the FILETIME for a date.","For FILETIME → Date: enter the decimal FILETIME value (100-nanosecond intervals since Jan 1, 1601) and click Convert.","For Date → FILETIME: pick a date/time from the selector and click Convert.","You can enter the value in either decimal or hexadecimal format. The result shows both representations.","Click 'Current Time' to populate with the current timestamp, or 'Clear' to reset the form."]},"knowledge":{"title":"About Windows FILETIME","sections":[{"title":"What is FILETIME?","content":"Windows FILETIME is a 64-bit integer representing the number of 100-nanosecond intervals since January 1, 1601 00:00:00 UTC. It is used throughout the Windows API for file timestamps (creation, modification, access time) and many other system operations."},{"title":"Common Uses","content":"FILETIME values appear in Windows registry entries, NTFS file metadata, event logs, and Windows API calls like GetSystemTimeAsFileTime(). When debugging Windows applications or analyzing forensic artifacts, converting these values to human-readable dates is essential."},{"title":"Comparison with Unix Time","content":"Unix timestamps count seconds from January 1, 1970. To convert FILETIME to Unix time: subtract 116444736000000000 (the number of 100-ns intervals between 1601 and 1970) then divide by 10,000,000. The FILETIME format offers nanosecond precision versus Unix time's second precision."}]}},"workdaysCalculator":{"title":"Business / Workday Calculator","description":"Calculate business days between two dates, or find a date by adding/subtracting workdays.","calculator":{"tabs":{"difference":"Calculate Difference (Days)","addSubtract":"Add/Subtract Workdays"},"inputs":{"startDate":"Start Date","endDate":"End Date","operation":"Operation","add":"Add Workdays","subtract":"Subtract Workdays","amount":"Number of Workdays","includeLastDay":"Include end date","holidays":"Custom Holidays (One per line, YYYY-MM-DD)","excludeWeekends":"Exclude Weekends (Sat, Sun)","buttonDiff":"Calculate Difference","buttonAdd":"Calculate New Date"},"results":{"title":"Result","totalDays":"Total Calendar Days","businessDays":"Business Days","weekendDays":"Weekend Days","holidayDays":"Holidays Excluded","formatFull":"Result Date","formatIso":"ISO 8601"},"error":{"invalidDate":"Please provide valid dates.","invalidAmount":"Please provide a valid number of workdays.","invalidHoliday":"Invalid holiday format: "}},"knowledge":{"title":"About Business Days","sections":[{"title":"What is a Business Day?","content":"A business day usually refers to any day of the week from Monday through Friday. Weekends and official public holidays are excluded."},{"title":"Adding Workdays","content":"If you add 5 workdays to a Monday, the result is the following Monday (assuming no holidays). Weekends are skipped during the calculation."},{"title":"Holidays","content":"Holidays vary by country, region, and industry. Our tool lets you type in custom holidays to be skipped so you can adapt calculations to your organization."}]}},"worldClock":{"title":"World Clock","description":"Conveniently compare current times across multiple global cities side-by-side.","addCity":"Add City","searchCity":"Search for a city or timezone...","localTime":"Your Local Time","offset":"Offset","remove":"Remove","noCitiesAdded":"No cities added yet. Click 'Add City' to start.","timeFormat":"Time Format","12hour":"12-hour","24hour":"24-hour","date":"Date","guide":{"title":"How to Use","items":["Click 'Add City' and search for a city name or timezone (e.g., 'Tokyo', 'Europe/Paris').","Select a result from the dropdown to add it to your world clock display.","Click the trash icon on any card to remove a timezone.","Toggle between 12-hour and 24-hour format using the buttons at the top.","The offset badge shows the time difference from your local time."]},"knowledge":{"title":"About Time Zones","sections":[{"title":"UTC and Offsets","content":"Coordinated Universal Time (UTC) is the global time standard. Time zones are expressed as UTC offsets ranging from UTC-12:00 to UTC+14:00 across the globe."},{"title":"Daylight Saving Time","content":"Many countries shift clocks forward by one hour in summer (DST), temporarily changing the UTC offset. The same city may show different offsets at different times of year."},{"title":"IANA Timezone Database","content":"Timezone names like 'America/New_York' come from the IANA Time Zone Database, the authoritative source used by all computers and mobile devices worldwide."}]}},"xmlFormatter":{"title":"XML Formatter","format":"Format","compress":"Minify","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","invalidXml":"Invalid XML format","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format, minify and edit XML data","Automatic syntax checking","Support code folding and expansion","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"XML Knowledge","introduction":"XML (Extensible Markup Language) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.","items":[{"title":"Basic Syntax","content":"XML documents form a tree structure that starts at 'the root' and branches to 'the leaves'. Elements have checks, attributes and content."},{"title":"Key Features","content":"Self-descriptive, extensible, platform independent, supports Unicode."}],"featuresTitle":"Key Features","features":["Separation of data and presentation","Strict syntax rules","Hierarchical structure","Widely used standard"],"applicationsTitle":"Applications","applications":["Configuration files","Data transport (SOAP, RSS, Atom)","SVG graphics","Document storage"]},"expand":"Expand All","fold":"Fold All"},"yamlFormatter":{"title":"YAML Formatter","format":"Format","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","invalidYaml":"Invalid YAML format","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format and edit YAML data","Automatic syntax checking","Support code folding and expansion","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"YAML Knowledge","introduction":"YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used to write configuration files.","items":[{"title":"Basic Syntax","content":"YAML uses indentation to represent structure, colons/spaces for key-value pairs, and dashes for lists. It is whitespace sensitive."},{"title":"Key Features","content":"Human readable, supports comments, supports complex data types, no closing tags required."}],"featuresTitle":"Key Features","features":["Highly readable and writable","Strict indentation rules","Supports comments","Superset of JSON (YAML 1.2)"],"applicationsTitle":"Applications","applications":["Configuration files (Docker, Kubernetes, CI/CD)","Data serialization","Log files"]},"expand":"Expand All","fold":"Fold All"},"yamlToml":{"title":"YAML to TOML Converter","description":"Convert YAML to TOML and TOML to YAML online.","yamlLabel":"YAML Input","tomlLabel":"TOML Output","toToml":"To TOML","toYaml":"To YAML","clear":"Clear","sample":"Paste your code here...","features":{"title":"Features","items":["Bidirectional conversion between YAML and TOML","Real-time syntax validation","One-click copy to clipboard","Secure client-side processing"]},"knowledge":{"title":"About YAML & TOML","items":[{"title":"What is YAML?","content":"YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used for configuration files."},{"title":"What is TOML?","content":"TOML (Tom's Obvious, Minimal Language) is a configuration file format that is easy to read due to obvious semantics. It is designed to map unambiguously to a hash table."}]},"guide":{"title":"How to Use","items":["Paste your YAML code into the left editor.","Click 'To TOML' to convert it to TOML format.","Or paste TOML into the right editor and click 'To YAML'.","Use the Copy button to save your result."]}},"zScoreCalculator":{"title":"Z-Score Calculator","description":"Calculate the Z-Score (standard score) for a given raw score, mean, and standard deviation.","rawScore":"Raw Score (x)","mean":"Population Mean (μ)","stdDev":"Standard Deviation (σ)","calculate":"Calculate","clear":"Clear","result":"Z-Score","p_value":"P-Value (Area under normal curve)","invalidInput":"Please enter valid numbers.","zeroStdDev":"Standard deviation cannot be zero.","guide":{"title":"How to Use","items":["Enter the raw score (x) for which you want to calculate the Z-score.","Enter the population mean (μ) of your dataset.","Enter the standard deviation (σ).","Click 'Calculate' to find the Z-score and the corresponding p-value (area to the left)."]},"knowledge":{"title":"About Z-Scores","introduction":"A Z-score (or standard score) indicates how many standard deviations an element is from the mean.","items":[{"title":"Formula","content":"Z = (x - μ) / σ\nWhere:\nx = Raw score\nμ = Population mean\nσ = Population standard deviation"},{"title":"Interpretation","content":"A Z-score of 0 means the score is exactly at the mean. A Z-score of +1 means the score is one standard deviation above the mean. A negative Z-score indicates the score is below the mean."}],"featuresTitle":"Key Features","features":["Calculates the exact Z-score.","Approximates the p-value (cumulative probability) associated with the Z-score."],"applicationsTitle":"Applications","applications":["Comparing scores from different normal distributions.","Hypothesis testing in statistics.","Identifying outliers in a dataset (typically |Z| > 3)."]}},"categories":{"checksum":{"title":"Checksum Tools","description":"Various checksum algorithm tools including XOR, LRC, CRC checksums","tools":{"sum":{"shortTitle":"Checksum Calculator","title":"Online Checksum Calculator","description":"Online checksum calculator. Calculate checksums by summing bytes for data verification. Simple and fast checksum calculation tool.","metadata":{"keywords":["checksum calculator","checksum calc","checksum calculation","calculate checksum","simple checksum","checksum calculator online","byte sum calculator","online checksum tool"],"openGraph":{"title":"Online Checksum Calculator - Free Byte Sum Tool","description":"Calculate checksums online by summing bytes. Simple and efficient tool for basic data verification and integrity checks."}}},"bcc":{"shortTitle":"BCC/XOR","title":"BCC/XOR Checksum Calculator","description":"Online BCC (Block Check Character) and XOR checksum calculator. Calculate BCC checksums for data verification and error detection.","metadata":{"keywords":["bcc calculator online","bcc calculator","bcc checksum","xor checksum calculator","xor checksum","block check character calculator","online bcc tool","checksum calculator"],"openGraph":{"title":"Online BCC/XOR Checksum Calculator - Free Block Check Character Tool","description":"Calculate BCC (Block Check Character) and XOR checksums online. Free tool for data verification and error detection."}}},"lrc":{"shortTitle":"LRC","title":"LRC Checksum Calculator | Longitudinal Redundancy Check Tool","description":"Online LRC (Longitudinal Redundancy Check) calculator. Calculate LRC checksum for data verification and error detection.","metadata":{"keywords":["lrc checksum calculator","lrc calculator online","longitudinal redundancy check calculator","lrc calculator","checksum calculator","online lrc tool"],"openGraph":{"title":"Online LRC Checksum Calculator - Free Longitudinal Redundancy Check Tool","description":"Calculate LRC (Longitudinal Redundancy Check) checksums online. Free tool for data verification and error detection."}}},"adler32":{"shortTitle":"Adler32 Checksum","title":"Adler32 Checksum Calculator","description":"Online Adler32 checksum calculator and hash generator. Fast and reliable data integrity verification tool with RFC 1950 compliance.","metadata":{"keywords":["adler32 hash calculator","adler32 calculator","adler32 checksum","adler32 online","adler32 hash generator","adler32 calculator online","checksum calculator","hash calculator online"],"openGraph":{"title":"Online Adler32 Checksum Calculator - Free Hash Generation Tool","description":"Calculate Adler32 checksums online. Fast, reliable and RFC 1950 compliant tool for data integrity verification. Perfect for ZIP files and streaming protocols."}}},"parity":{"shortTitle":"Parity Check","title":"Parity Check Calculator","description":"Online parity calculator for odd and even parity checking. 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14:["$","$L15",null,{"formats":"$undefined","locale":"en","messages":{"3des":{"title":"3DES (Triple DES) Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"24 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - Electronic Codebook","cbc":"CBC - Cipher Block Chaining","cfb":"CFB - Cipher Feedback","ofb":"OFB - Output Feedback","ctr":"CTR - Counter","gcm":"GCM - Galois/Counter Mode"},"padding":{"title":"Padding Mode","pkcs7":"PKCS#7 Padding","iso97971":"ISO/IEC 9797-1 Padding","ansix923":"ANSI X.923 Padding","iso10126":"ISO 10126 Padding","zeropadding":"Zero Padding","nopadding":"No Padding"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter 16 bytes IV text","hex":"Enter 32 digits hex IV"},"generate":"Generate Random IV","error":"Invalid IV length","positionTitle":"IV Position","positionDesc":"Choose how IV is handled with ciphertext","position":{"manual":"Manual - Provide IV separately","header":"Header - Automatically prepend/extract IV at beginning","footer":"Footer - Automatically append/extract IV at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"3DES (Triple DES) Knowledge","sections":[]}},"AdPanel":{"adPlaceholder":"Ad Space - Ads not shown in development","loading":"Loading advertisement...","error":"Failed to load advertisement"},"Feedback":{"subject":"Feedback Subject","content":"Feedback Content","email":"Your Email","submit":"Submit"},"about":{"title":"About Us","lastUpdated":"Last Updated: July 17, 2025","introduction":{"title":"Company Introduction","content":"Online Calculator Tools is a professional online platform specializing in online calculator tools. We are committed to providing efficient, convenient, and secure online calculator tools for engineers, technicians, and automation professionals worldwide.\n\nSince our establishment, we have been focusing on the field of online calculator, providing comprehensive online tool solutions for online calculator. 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The math snaps to the end of the target month if the result would exceed the number of days in that month."},{"title":"Weeks vs Days","content":"Adding 1 week is always exactly equivalent to adding 7 days. Modifying months or years depends on the calendar boundaries."},{"title":"Timezones and Daylight Saving Time (DST)","content":"When adding days across DST transitions (e.g., Spring Forward or Fall Back), the wall-clock time remains the same, but the absolute duration in hours might be 23 or 25 instead of 24."}]}},"adler32":{"title":"Adler32 Checksum Calculator","inputFormat":"Input Format","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate Adler32..."},"results":{"hex":"Adler32 Result (Hex)","dec":"Adler32 Result (Dec)","oct":"Adler32 Result (Oct)","bin":"Adler32 Result (Bin)"},"knowledge":{"title":"Adler32 Knowledge","description":"Adler32 is a checksum algorithm that combines two 16-bit sums into a 32-bit checksum.","features":{"title":"Features","items":["Fast calculation: Suitable for real-time applications","Low resource usage: Efficient for embedded systems","Less reliable than CRC32 for error detection","Commonly used in zlib compression"]},"applications":{"title":"Applications","items":["Data integrity verification","File checksum calculation","Network data transmission","Embedded systems","Compression algorithms"]},"security":{"title":"Security Recommendations","items":["Not suitable for cryptographic purposes","Consider using CRC32 for better error detection","Combine with other methods for critical data","Be aware of its limitations in error detection"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"aes":{"title":"AES Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"Enter 16/24/32 bytes hex key"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - 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Key features:\n- Same plaintext blocks produce different ciphertext blocks\n- Encryption cannot be parallelized, but decryption can\n- Requires padding\n- An error in one block affects all subsequent block decryption"},{"name":"ECB (Electronic Codebook) Mode","detail":"The most basic encryption mode, directly encrypting plaintext blocks into ciphertext blocks without additional processing. Key features:\n- Same plaintext blocks produce same ciphertext blocks\n- Both encryption and decryption can be parallelized\n- Requires padding\n- Lower security, not recommended for most scenarios"},{"name":"CFB (Cipher Feedback) Mode","detail":"Converts block cipher into stream cipher, allowing bit or byte-level encryption. During encryption, the previous ciphertext block is encrypted (initially using IV), and the result is XORed with current plaintext block. Features:\n- No padding required\n- Supports real-time encryption\n- Error propagation occurs\n- Encryption cannot be parallelized, but decryption can"},{"name":"OFB (Output Feedback) Mode","detail":"Similar to CFB, but the encryption result of the previous ciphertext block is directly used as input for the next block, XORed with plaintext. Features:\n- No padding required\n- Same operation for encryption and decryption\n- Keystream can be generated in advance\n- No error propagation"},{"name":"CTR (Counter) Mode","detail":"Uses incrementing counter values for encryption, XORing the result with plaintext to get ciphertext. Features:\n- Supports parallel processing\n- No padding required\n- Random access supported\n- High security, but counter values must not repeat"},{"name":"GCM (Galois/Counter Mode)","detail":"GCM is a mode of operation for block ciphers that provides both data authenticity and confidentiality. It uses a counter to generate the encryption key stream and a message authentication code (MAC) to ensure data integrity. Key features:\n- Supports parallel processing\n- No padding required\n- Random access supported\n- High security, but counter values must not repeat"}]},{"title":"Padding Modes in Detail","content":[{"name":"PKCS7 Padding","detail":"Most commonly used padding method. If n bytes of padding are needed, each byte is filled with the number n. For example, if 3 bytes of padding are needed, it fills: 03 03 03"},{"name":"ISO10126 Padding","detail":"Fills with random data except for the last byte. The last byte indicates the number of padding bytes. This method increases security as the padding content is unpredictable"},{"name":"ANSIX923 Padding","detail":"Fills with zeros, with the last byte indicating the number of padding bytes. For example, if 3 bytes of padding are needed, it fills: 00 00 03"},{"name":"ISO97971 Padding","detail":"First fills with 1, then fills with zeros. This method ensures accurate padding removal"},{"name":"ZeroPadding","detail":"Simply fills with zeros up to the block size. This method can be ambiguous, especially when the original text ends with zeros"},{"name":"NoPadding","detail":"No padding is performed, requiring data length to be a multiple of the block size. Special attention to data length is needed when using this method"}]}]}},"ageCalculator":{"title":"Age Calculator","description":"Calculate age in years, months, and days from a birthdate to a given date.","inputDobLabel":"Date of Birth","inputDobPlaceholder":"Select birth date","inputTargetDateLabel":"Target Date (Age at this date)","inputTargetDatePlaceholder":"Select target date","calculateBtn":"Calculate","resultTitle":"Calculation Result","ageYearsMonthsDays":"Age: {years} years, {months} months, {days} days","detailsTitle":"Detailed Breakdown","totalMonths":"Total Months: {months}","totalWeeks":"Total Weeks: {weeks}","totalDays":"Total Days: {days}","totalHours":"Total Hours: {hours}","totalMinutes":"Total Minutes: {minutes}","nextBirthdayTitle":"Next Birthday","nextBirthdayIn":"In {months} months and {days} days","clearForm":"Clear","aboutTitle":"About Age Calculation","aboutContent":"The age calculator determines the exact time interval between a given birthdate and a target date (usually the current day). Culturally, age is most commonly expressed in complete years based on the anniversary of the birthdate. This tool also provides an extensive breakdown into total months, weeks, days, hours, and minutes lived up to the target date.","errorInvalidDate":"Please ensure the dates are valid and the Date of Birth is before the target date.","guide":{"title":"How to Use","items":["Select your date of birth using the date picker in the 'Date of Birth' field.","Optionally set a target date to calculate age as of that specific date (defaults to today).","Click 'Calculate Age' to see your exact age in years, months, and days.","The result also shows your total months, weeks, days, hours, and minutes of life.","The 'Next Birthday' section shows how many months and days remain until your next birthday."]},"knowledge":{"title":"About Age Calculation","sections":[{"title":"How Age is Calculated","content":"Age is calculated by finding the difference between the birth date and the target date (usually today). The result accounts for varying month lengths and leap years: e.g., someone born on Feb 29 in a leap year typically celebrates on Feb 28 or Mar 1 in non-leap years. The exact count includes years, months remaining after full years, and days remaining after full months."},{"title":"Legal and Cultural Age Systems","content":"Most Western countries use the anniversary system (age increases on the birthday). East Asian cultures traditionally use the East Asian age reckoning (born at age 1, increases on New Year). In South Korea, a 2023 law standardized the Western system. Some countries calculate age differently for legal purposes like drinking, voting, or retirement."},{"title":"Interesting Age Facts","content":"A human heart beats about 100,000 times per day, so by age 70 it has beaten about 2.5 billion times. The oldest verified human was Jeanne Calment (France) who lived to 122 years and 164 days. In terms of total days, a 30-year-old has lived approximately 10,950 days."}]}},"arccosCalculator":{"title":"Arccos Calculator","value":"Value (x)","calculate":"Calculate","clear":"Clear","result":"Result (arccos x)","degrees":"Degrees","radians":"Radians","invalidInput":"Value must be between -1 and 1","guide":{"title":"How to Use","items":["Enter a value between -1 and 1.","Click 'Calculate' to find the inverse cosine (arccos) of the value.","The result will be displayed in both degrees and radians.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Arccosine (arccos)","introduction":"In trigonometry, the arccosine is the inverse function of the cosine function. It calculates the angle whose cosine is a given number.","items":[{"title":"Domain and Range","content":"The domain (input) of arccos(x) is [-1, 1]. The range (output) is [0°, 180°] or [0, π] radians."},{"title":"Notation","content":"arccos(x) can also be written as cos⁻¹(x) or acos(x)."}],"featuresTitle":"Common Values","features":["arccos(1) = 0° (0 rad)","arccos(0.5) = 60° (π/3 rad)","arccos(0) = 90° (π/2 rad)","arccos(-1) = 180° (π rad)"],"applicationsTitle":"Applications","applications":["Finding unknown angles in triangles using the Law of Cosines","Calculating angles between vectors in physics and 3D graphics","Solving mathematical equations involving cosine"]}},"arcsinCalculator":{"title":"Arcsin Calculator","value":"Value (x)","calculate":"Calculate","clear":"Clear","result":"Result (arcsin x)","degrees":"Degrees","radians":"Radians","invalidInput":"Value must be between -1 and 1","guide":{"title":"How to Use","items":["Enter a value between -1 and 1.","Click 'Calculate' to find the inverse sine (arcsin) of the value.","The result will be displayed in both degrees and radians.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Arcsine (arcsin)","introduction":"In trigonometry, the arcsine is the inverse function of the sine function. It calculates the angle whose sine is a given number.","items":[{"title":"Domain and Range","content":"The domain (input) of arcsin(x) is [-1, 1]. The range (output) is [-90°, 90°] or [-π/2, π/2] radians."},{"title":"Notation","content":"arcsin(x) can also be written as sin⁻¹(x) or asin(x)."}],"featuresTitle":"Common Values","features":["arcsin(0) = 0° (0 rad)","arcsin(0.5) = 30° (π/6 rad)","arcsin(1) = 90° (π/2 rad)","arcsin(-1) = -90° (-π/2 rad)"],"applicationsTitle":"Applications","applications":["Finding unknown angles in right-angled triangles","Solving trigonometric equations","Physics and engineering calculations involving angles"]}},"arctanCalculator":{"title":"Arctan Calculator","value":"Value (x)","calculate":"Calculate","clear":"Clear","result":"Result (arctan x)","degrees":"Degrees","radians":"Radians","invalidInput":"Invalid input","guide":{"title":"How to Use","items":["Enter any real number.","Click 'Calculate' to find the inverse tangent (arctan) of the value.","The result will be displayed in both degrees and radians.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Arctangent (arctan)","introduction":"In trigonometry, the arctangent is the inverse function of the tangent function. It calculates the angle whose tangent is a given number.","items":[{"title":"Domain and Range","content":"The domain (input) of arctan(x) is all real numbers (-∞, ∞). The range (output) is (-90°, 90°) or (-π/2, π/2) radians."},{"title":"Notation","content":"arctan(x) can also be written as tan⁻¹(x) or atan(x)."}],"featuresTitle":"Common Values","features":["arctan(0) = 0° (0 rad)","arctan(1) = 45° (π/4 rad)","arctan(-1) = -45° (-π/4 rad)","As x approaches ∞, arctan(x) approaches 90° (π/2 rad)","As x approaches -∞, arctan(x) approaches -90° (-π/2 rad)"],"applicationsTitle":"Applications","applications":["Converting rectangular coordinates (x,y) to polar coordinates (r,θ)","Calculating the angle of elevation or depression","Electrical engineering calculations involving phase angles"]}},"argon2-generator":{"title":"Argon2 Hash Generator","config":{"title":"Argon2 Parameters","password":"Password","salt":"Salt (Required)","type":"Argon2 Type","memory":"Memory Cost (KB)","iterations":"Time Cost (Iterations)","parallelism":"Parallelism (Threads)","hashLength":"Output Hash Length (Bytes)","generateBtn":"Generate Argon2 Hash"},"results":{"title":"Argon2 Result","encoded":"Encoded Hash (PHC format)","hex":"Raw Hash (Hex)"}},"asciiEncoder":{"convert":{"title":"ASCII Encode/Decode","input":"Input","output":"Output","clear":"Clear","inputPlaceholder":"Enter text or ASCII codes...","outputPlaceholder":"Result will be displayed here...","encodeButton":"To ASCII","decodeButton":"To Text","swapButton":"Swap"},"guide":{"title":"Instructions","items":["To ASCII: Convert characters to their ASCII numeric values","To Text: Convert ASCII numeric values back to characters","Supports decimal values (0-127)"]},"knowledge":{"title":"ASCII Knowledge","items":[{"title":"What is ASCII?","content":"ASCII (American Standard Code for Information Interchange) is a character encoding standard for electronic communication. ASCII codes represent text in computers."},{"title":"Range","content":"Standard ASCII uses 7 bits to represent 128 characters (0-127). Extended ASCII uses 8 bits (0-255)."}],"featuresTitle":"Key Features","features":["7-bit character set","Foundation of modern character encodings","Includes control characters (0-31)"],"applicationsTitle":"Common Applications","applications":["Legacy systems","Network protocols","Programming source code","Configuration files"]}},"aspectRatio":{"calculator":{"title":"Aspect Ratio Calculator","presets":"Ratio Presets","ratioTitle":"Ratio Settings","dimensionsTitle":"Dimension Settings","width":"Width","height":"Height","swap":"Swap","currentRatio":"Current ratio","currentDimensions":"Current dimensions","pixels":"pixels","presetRatios":{"16_9":"16:9 (HD Video)","4_3":"4:3 (Standard Monitor)","21_9":"21:9 (CinemaScope)","3_2":"3:2 (Camera)","9_16":"9:16 (Vertical Video)"},"preview":"Preview","customRatio":"Custom Ratio","custom":"Custom"},"knowledge":{"title":"Aspect Ratio Knowledge","items":[{"title":"What is Aspect Ratio?","content":"Aspect ratio is the mathematical proportional relationship between the width and height of images, videos, or screens. Typically expressed as x:y format (like 16:9, 4:3), aspect ratio is a fundamental concept in digital media production that determines how content appears across different devices and platforms."},{"title":"Why Aspect Ratio Matters?","content":"Correct aspect ratio ensures visual integrity across different devices, preventing stretching or compression distortion. For designers, mastering aspect ratio calculations is essential for responsive design, video editing, and image processing. Incorrect aspect ratios can cause content to display improperly on certain platforms."},{"title":"Image Aspect Ratio Applications","content":"In digital image processing, aspect ratio determines photo composition and visual impact. Photographers must choose appropriate ratios based on output medium: 1:1 squares for social media, 3:2 for traditional cameras, or 16:9 for modern displays. The right aspect ratio maximizes visual impact and ensures proper display across platforms."},{"title":"Video Aspect Ratio Standards","content":"Video aspect ratio directly affects viewing experience. 16:9 is the standard for modern HD video, perfect for YouTube and TV broadcasts; 9:16 suits mobile vertical video; 21:9 ultra-wide format is common in filmmaking. Choosing the correct video aspect ratio ensures content displays perfectly on target platforms."},{"title":"Aspect Ratio Calculation Methods","content":"To calculate aspect ratio, first determine the pixel dimensions of your image or video, then find the greatest common divisor (GCD) to simplify. For example, a 1920×1080 pixel image has a GCD of 240, simplifying to 16:9. An aspect ratio calculator can quickly perform these calculations for you."},{"title":"Responsive Design Aspect Ratios","content":"In web design and mobile app development, responsive aspect ratios ensure consistent visual effects across different screen sizes. CSS aspect-ratio properties and aspect ratio calculators help developers create adaptive interface layouts, improving user experience and interface aesthetics."}],"commonRatiosTitle":"Common Aspect Ratios Explained","commonRatios":[{"name":"16:9 Widescreen","ratio":"16:9","description":"The standard aspect ratio for modern HD TVs, computer monitors, and most online videos. This ratio provides a wide field of view, perfect for movies and gaming, and is the mainstream format for YouTube, Netflix, and other platforms."},{"name":"4:3 Traditional","ratio":"4:3","description":"The standard ratio for traditional TVs and early computer monitors, also commonly used in professional photography and academic presentations. While less common in consumer electronics, it remains important in certain professional applications."},{"name":"21:9 Ultra-wide","ratio":"21:9","description":"Used in cinema widescreen and ultra-wide monitors, providing an immersive viewing experience. Common in high-end gaming monitors and professional video editing workstations, capable of displaying more horizontal content."},{"name":"1:1 Square","ratio":"1:1","description":"Square format widely used by Instagram and other social media platforms, also suitable for avatars, logo design, and artistic photography. Square composition provides good visual balance on mobile devices."},{"name":"3:2 Camera","ratio":"3:2","description":"The native ratio of traditional 35mm film and most digital SLR cameras. This ratio is widely accepted in photography circles, providing good compositional balance for portrait and landscape photography."},{"name":"9:16 Vertical Video","ratio":"9:16","description":"The standard ratio for mobile device vertical videos, particularly suitable for TikTok, Instagram Stories, and native phone recording. This ratio has become increasingly important with the growth of mobile content consumption."}],"applicationsTitle":"Applications of Aspect Ratio","applications":["Photography & Image Editing: Maintain original proportions when resizing photos, avoid image distortion, ensure visual integrity across different output formats","Video Production & Editing: Ensure video content displays correctly on YouTube, TikTok, TV and other platforms, improving viewer experience","Web Design & Development: Consider display ratios of different devices when creating responsive designs, ensure interface elements are harmonious on all screens","Print Design & Layout: Adjust designs for different print media sizes like posters, flyers, book covers, maintaining visual impact","Game Development & Interface Design: Optimize game interfaces for different resolutions and aspect ratios, ensure game elements display correctly on various devices","Television & Film Production: Convert video content between different broadcast formats, adapting from traditional TV to modern streaming platforms","Mobile App Development: Design interfaces for iOS and Android devices, considering aspect ratio adaptation from iPhone to iPad","Digital Marketing & Advertising: Create marketing materials for different social media platforms, ensure brand consistency across all channels"],"seoTitle":"Online Aspect Ratio Calculator User Guide","seoContent":{"title":"How to Use Aspect Ratio Calculator to Improve Work Efficiency","content":"An aspect ratio calculator is an essential tool for designers, photographers, and video creators. By precisely calculating the proportional relationships of images and videos, you can ensure content displays perfectly across various devices and platforms. Our online aspect ratio calculator supports common presets like 16:9, 4:3, 21:9, while allowing custom ratio calculations to meet all professional needs.","featuresTitle":"Key Features","features":["Common aspect ratio presets: 16:9 HD, 4:3 Standard, 21:9 Ultra-wide, etc.","Real-time preview: Visual display of aspect ratio effects","Custom ratio calculation: Input any dimensions for automatic ratio calculation","Ratio simplification: Simplify complex ratios to simplest fraction form","Multi-format support: Suitable for images, videos, web design, and more"]},"professionalTips":{"title":"Professional Aspect Ratio Calculator Tips","sections":[{"title":"Essential Skills for Designers","content":"Mastering aspect ratio calculations is a core skill for modern designers. Whether creating responsive web layouts, adjusting social media image sizes, or working on print designs, the correct aspect ratio ensures designs maintain perfect visual effects across various media. Our calculator supports everything from traditional 4:3 ratios to modern 21:9 ultra-wide formats."},{"title":"Professional Video Production Tool","content":"Video creators need to optimize content formats for different platforms. YouTube recommends 16:9 landscape format, TikTok and Instagram Stories use 9:16 portrait format, while film production typically uses 21:9 widescreen format. Using an aspect ratio calculator allows precise video dimension adjustments, avoiding black bars and content cropping issues."},{"title":"Photography Post-Processing","content":"In digital photography, different camera sensors have different native aspect ratios. Full-frame cameras typically use 3:2, medium format may be 4:3 or other ratios. During post-processing, photographers need to choose appropriate cropping ratios based on output purposes, and our tool helps calculate precise pixel dimensions."},{"title":"Mobile App Interface Design","content":"Mobile device screen sizes vary widely, from iPhone's 19.5:9 to iPad's 4:3, requiring designers to consider multiple aspect ratio adaptations. Responsive design demands interface elements maintain good visual balance across different ratios, making aspect ratio calculators an important auxiliary tool for UI/UX designers."}],"tip":{"title":"Professional Tip:","content":"When using an aspect ratio calculator, it's recommended to first determine the main display platform for your content, then select the corresponding standard ratio. For content that needs to be published across multiple platforms, choose 16:9 as the base ratio and adapt to other formats through cropping. Remember, maintaining aspect ratio consistency is an important mark of professional design."}}}},"averageCalculator":{"title":"Average Calculator","description":"Calculate the mean, median, mode, and range of a data set.","keywords":"average calculator, mean calculator, median calculator, mode calculator","category":"Math","dataset":"Data Set","datasetPlaceholder":"Enter numbers separated by commas, spaces, or new lines","calculate":"Calculate","clear":"Clear","mean":"Mean (Average)","median":"Median","mode":"Mode","range":"Range","count":"Count","sum":"Sum","guide":{"title":"How to use","items":["Enter a series of numbers in the input field.","Separate numbers with commas, spaces, or new lines.","The tool will automatically calculate statistical properties."]},"knowledge":{"title":"About Averages","introduction":"In statistics, an average is a single number taken as representative of a list of numbers.","items":[{"title":"Mean vs Median","content":"Mean: Sum of values / Count of values\nMedian: The middle value when sorted"}],"featuresTitle":"Features","features":["Calculate Mean, Median, Mode","Calculate Range, Sum, Count","Support for large datasets"],"applicationsTitle":"Applications","applications":["Grade calculation","Data analysis","Scientific research"]}},"barcodeCode128":{"title":"Code 128 Barcode Generator","description":"A high-density alphanumeric barcode supporting the full ASCII character set.","inputLabel":"Barcode Content","inputPlaceholder":"Enter characters (support digits, letters, symbols)","guide":{"title":"How to use","items":["Input: Code 128 supports almost all keyboard characters.","Application: Used for shipping labels, asset tags, and inventory management.","Format: Extremely compact and reliable for various data types."]},"knowledge":{"title":"About Code 128","items":[{"title":"Versatile Encoding","content":"Code 128 can encode all 128 ASCII characters. It uses three different character subsets (A, B, C) to optimize the barcode's length based on the data."}]}},"barcodeCode39":{"title":"Code 39 Barcode Generator","description":"A classic discrete alphanumeric barcode, widely used in industrial applications.","inputLabel":"Barcode Content","inputPlaceholder":"Enter uppercase letters, digits, or allowed symbols","guide":{"title":"How to use","items":["Allowed Characters: Supports uppercase (A-Z), digits (0-9), and (- . $ / + % SPACE).","Self-checking: It is a self-checking barcode, but an optional checksum can be added.","Stars: Typically starts and ends with an asterisk (*), handled automatically."]},"knowledge":{"title":"About Code 39","items":[{"title":"Versatility","content":"Code 39 is one of the most flexible barcodes because it supports both numbers and capital letters."}]}},"barcodeCommon":{"customization":"Barcode Customization","scale":"Scale factor","height":"Barcode height","includetext":"Show text","rotate":"Rotation","download":"Download Barcode","rotate_0":"No Rotation","rotate_R":"Rotate 90° Right","rotate_L":"Rotate 90° Left","rotate_I":"Invert 180°"},"barcodeDataMatrix":{"title":"Data Matrix Generator","description":"Compact 2D matrix barcode for marking small items and electronic components.","inputLabel":"Content","inputPlaceholder":"Enter text or data to encode","guide":{"title":"How to use","items":["Capacity: Stores far more information than traditional 1D barcodes.","Size: Can be extremely small, even on surfaces as small as 2mm².","Usage: Common in industrial tracking, pharmaceuticals, and electronics."]},"knowledge":{"title":"About Data Matrix","items":[{"title":"Data Matrix vs QR Code","content":"While QR codes are often for consumer marketing, Data Matrix is preferred in industrial and healthcare sectors for its high readability even at tiny sizes."}]}},"barcodeEan":{"title":"EAN Barcode Generator","description":"Generate EAN-13 or EAN-8 standard barcodes for retail product identification.","inputLabel":"Barcode Content","inputPlaceholder":"Enter 8 or 13 digits","typeLabel":"Barcode Type","guide":{"title":"How to use","items":["EAN-13: Enter 12 digits, and the system will calculate the 13th checksum digit; or enter the full 13 digits.","EAN-8: Enter 7 digits, and the system will calculate the 8th checksum digit; or enter the full 8 digits.","Customization: Adjust scale, height, and text display using the panel below."]},"knowledge":{"title":"About EAN Barcode","items":[{"title":"What is EAN?","content":"EAN (European Article Number) is the global standard for product identification, now known as GS1."}]}},"barcodeUpc":{"title":"UPC Barcode Generator","description":"Generate UPC-A or UPC-E standard barcodes for North American retail.","inputLabel":"Barcode Content","inputPlaceholder":"Enter 12 digits (UPC-A) or 6-8 digits (UPC-E)","typeLabel":"Barcode Type","guide":{"title":"How to use","items":["UPC-A: Standard 12-digit barcode. Enter 11 digits to auto-calculate the checksum.","UPC-E: Compressed 6 or 8-digit version for small packages.","Download: Preview the generated barcode and download in high quality."]},"knowledge":{"title":"About UPC Barcode","items":[{"title":"UPC vs EAN","content":"UPC is mainly used in North America, while EAN is used globally. UPC-A is essentially a subset of EAN-13."}]}},"base16Encoder":{"convert":{"title":"Base16 Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here...","uppercase":"Uppercase Output"},"guide":{"title":"Instructions","items":["Encode text to Base16 (hexadecimal) format","Decode Base16 strings back to text","Option to output uppercase or lowercase letters"]},"knowledge":{"title":"Base16 Knowledge","items":[{"title":"What is Base16?","content":"Base16 is the standardized name for hexadecimal encoding, defined in RFC 4648. It uses characters 0-9 and A-F to represent data."},{"title":"Difference from Hex Encoding","content":"Base16 and hexadecimal encoding are essentially the same, but Base16 is the RFC-standardized name, typically using uppercase letters A-F."}],"featuresTitle":"Key Features","features":["RFC 4648 standardized encoding","Each byte represented by 2 characters","Case-insensitive decoding"],"applicationsTitle":"Common Applications","applications":["Data transmission and storage","Debugging and logging","Binary data in configuration files"]}},"base32Encoder":{"convert":{"title":"Base32 Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will be displayed here...","padding":"Padding","variant":"Variant","variants":{"standard":"Standard (RFC 4648)","hex":"Base32Hex (RFC 4648)"}},"error":{"invalidBase32":"Invalid Base32 Input","encodeFailed":"Encoding Failed","decodeFailed":"Decoding Failed"},"guide":{"title":"Instructions","items":["Encode text to Base32 format","Decode Base32 strings back to text","Supports Standard (A-Z, 2-7) and Hex (0-9, A-V) variants"]},"knowledge":{"title":"Base32 Knowledge","items":[{"title":"What is Base32?","content":"Base32 is a transfer encoding using a 32-character set, often A-Z and 2-7."},{"title":"Comparison with Base64","content":"Base32 is case-insensitive and avoids ambiguous characters (like 1, l, I, 0, O), making it safer for human use."}],"featuresTitle":"Key Features","features":["Case-insensitive","Human-readable and robust against transcription errors","~20% less efficient than Base64"],"applicationsTitle":"Common Applications","applications":["TOTP (Two-Factor Authentication) secrets","File systems requiring case-insensitive names","Tor onion addresses","Legacy systems"]}},"base58Encoder":{"convert":{"title":"Base58 Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will be displayed here..."},"error":{"invalidBase58":"Invalid Base58 Input","encodeFailed":"Encoding Failed","decodeFailed":"Decoding Failed"},"guide":{"title":"Instructions","items":["Encode text to Base58 (Bitcoin style)","Decode Base58 strings back to text"]},"knowledge":{"title":"Base58 Knowledge","items":[{"title":"What is Base58?","content":"Base58 is a group of binary-to-text encoding schemes used to represent large integers as alphanumeric text."},{"title":"Design Philosophy","content":"Designed to be human-readable by removing ambiguous characters: 0 (zero), O (capital o), I (capital i), and l (lower L)."}],"featuresTitle":"Key Features","features":["Double-click selection friendly (no special chars like + or /)","Avoids visual ambiguity","Used extensively in cryptocurrencies"],"applicationsTitle":"Common Applications","applications":["Bitcoin addresses","IPFS hashes","Short URL generation","Ripple and other crypto addresses"]}},"base64":{"title":"Base64 Encoder/Decoder","description":"Base64 encoding and decoding with UTF-8 and HEX format support","convert":{"title":"Base64 Conversion","inputFormat":"Input Format","outputFormat":"Output Format","inputPlaceholder":{"utf8":"Enter text to process...","hex":"Enter hex string..."},"outputPlaceholder":"Result will be displayed here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap"},"format":{"utf8":"UTF-8","hex":"HEX"},"guide":{"title":"Instructions","items":["Encode: Convert input content to Base64 format","Decode: Convert Base64 format back to original format","Input Format: Choose input content format (UTF-8 text or hexadecimal)","Output Format: Choose output format after decoding (UTF-8 text or hexadecimal)","HEX format example: 48656C6C6F (represents 'Hello')"]},"knowledge":{"title":"Base64 Knowledge:","items":[{"title":"What is Base64?","content":"Base64 is an encoding scheme that represents binary data using a set of 64 printable characters, allowing binary data to be safely transmitted as ASCII text."},{"title":"Encoding Principle","content":"Converts 3 bytes of data into 4 printable characters. Uses A-Z, a-z,0-9, +, / characters, with = for padding."},{"title":"Use Cases","content":"Commonly used in HTTP, email, and other scenarios where binary data needs to be transmitted as text, such as images and files."},{"title":"Characteristics","content":"Base64 encoded data is approximately 33% larger than the original, but ensures printability and transmissibility."}],"featuresTitle":"Key Features:","features":["Can convert any binary data to printable characters","Encoded data contains only ASCII printable characters","Supports text in any language and character set","Results can be safely transmitted between different systems"],"applicationsTitle":"Common Applications:","applications":["Email attachments encoding","Embedding images in web pages (Data URI)","API data transmission","URL-safe data transmission","Certificate and key text representation"]}},"base85Encoder":{"convert":{"title":"Base85 Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"Instructions","items":["Encode text to Base85 format","Decode Base85 strings back to text","More compact than Base64, approximately 80% efficiency"]},"knowledge":{"title":"Base85 Knowledge","items":[{"title":"What is Base85?","content":"Base85 (also known as Ascii85) is an efficient binary-to-text encoding scheme that encodes 4 bytes into 5 printable characters, achieving approximately 80% efficiency."},{"title":"Encoding Principle","content":"Base85 uses 85 printable ASCII characters to encode data by converting 32-bit integers into 5 base-85 digits."}],"featuresTitle":"Key Features","features":["About 7% more efficient than Base64","4 input bytes produce 5 output characters","Commonly used in PDF and PostScript"],"applicationsTitle":"Common Applications","applications":["PDF file format","PostScript","Git binary diffs","ZeroMQ (Z85 variant)"]}},"base91Encoder":{"convert":{"title":"Base91 Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"Instructions","items":["Encode text to Base91 format","Decode Base91 strings back to text","Most efficient ASCII printable character encoding"]},"knowledge":{"title":"Base91 Knowledge","items":[{"title":"What is Base91?","content":"Base91 is a highly efficient binary-to-text encoding scheme using 91 printable ASCII characters, achieving approximately 89% encoding efficiency."},{"title":"Comparison with Other Encodings","content":"Base91 is more compact than both Base64 (75% efficiency) and Base85 (80% efficiency), making it the most efficient known ASCII printable character encoding."}],"featuresTitle":"Key Features","features":["Approximately 89% encoding efficiency","Uses 91 printable ASCII characters","Variable-length encoding"],"applicationsTitle":"Common Applications","applications":["Compressed data transmission","Bandwidth reduction","Embedded system data storage"]}},"bcc":{"title":"BCC Checksum Calculator","inputFormat":"Input Format","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate BCC..."},"results":{"hex":"BCC Result (Hex)","dec":"BCC Result (Dec)","oct":"BCC Result (Oct)","bin":"BCC Result (Bin)"},"knowledge":{"title":"BCC (Block Check Character) Knowledge","description":"BCC (Block Check Character), also known as XOR Checksum, is a data verification method that performs XOR operations on all bytes in a data stream. BCC and XOR Checksum are essentially the same algorithm with different names.","features":{"title":"Features","items":["Simple calculation: Only requires XOR operation","Also known as XOR Checksum or Longitudinal Parity Check","Good real-time performance: Can calculate while receiving data","Low resource usage: Only needs one byte of storage","Widely used in industrial communication protocols"]},"applications":{"title":"Applications","items":["Industrial communication protocols (e.g., Modbus)","Serial communication","Data packet verification","Simple error detection","Embedded systems communication"]},"security":{"title":"Security Recommendations","items":["Not suitable for data security purposes","Cannot detect even number of bit errors","Consider using CRC for better error detection","Combine with other verification methods for critical data"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"bcrypt-checker":{"title":"Bcrypt Checker","config":{"title":"Verify Configuration","hash":"Bcrypt Hash","hashPlaceholder":"$$2a$10$...","password":"Password to verify","passwordPlaceholder":"Enter password...","verifyBtn":"Verify Match"},"results":{"match":"The password MATCHES the hash!","noMatch":"Does NOT match."}},"bcrypt-generator":{"title":"Bcrypt Hash Generator","config":{"title":"Bcrypt Settings","password":"Password","placeholder":"Enter password to hash...","cost":"Cost Factor (Rounds)","generateBtn":"Generate Bcrypt Hash"},"results":{"title":"Generated Hash","hash":"Bcrypt Output"}},"big5Utf8Encoder":{"convert":{"title":"Big5/UTF-8 Encoding Converter","input":"Input","output":"Output","big5ToUtf8":"Big5 → UTF-8","utf8ToBig5":"UTF-8 → Big5","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter Big5 encoded hex data...","textInputPlaceholder":"Enter text to convert to Big5...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["Big5 to UTF-8: Enter Big5 encoded hex data","UTF-8 to Big5: Enter Unicode text","Supports bidirectional conversion of Traditional Chinese"]},"knowledge":{"title":"Big5 Encoding Knowledge","items":[{"title":"What is Big5?","content":"Big5 is a Traditional Chinese character encoding used primarily in Taiwan, Hong Kong, and Macau, covering 13053 Chinese characters."},{"title":"Big5 vs GBK","content":"Big5 is for Traditional Chinese, GBK is for Simplified Chinese. They use different character sets."}],"featuresTitle":"Key Features","features":["Traditional Chinese standard","Double-byte encoding","Widely used in Taiwan/HK/Macau"],"applicationsTitle":"Common Applications","applications":["Traditional Chinese websites","Taiwan software","Traditional Chinese documents"]}},"binaryCalculator":{"seoTitle":"Binary Calculator | Add, Subtract, Multiply - TE Cyber","seoDescription":"Free online binary calculator. Perform addition, subtraction, multiplication, and division on binary numbers.","title":"Binary Calculator","description":"Calculate binary numbers using basic mathematical operations.","binaryA":"Binary Number A","binaryB":"Binary Number B","operation":"Operation","add":"Addition (+)","subtract":"Subtraction (-)","multiply":"Multiplication (×)","divide":"Division (÷)","calculate":"Calculate","clear":"Clear","result":"Binary Result","decimalResult":"Decimal Result","invalidInput":"Please enter valid binary numbers containing only 0 and 1.","divideByZero":"Division by zero is not allowed.","guide":{"title":"How to Use","items":["Enter the first binary number in the first field (e.g., 1010).","Select the mathematical operation (+, -, ×, ÷).","Enter the second binary number in the second field (e.g., 0101).","Click 'Calculate' to see the result in both binary and decimal forms."]},"knowledge":{"title":"About Binary Math","introduction":"The binary numeral system uses only two symbols: typically '0' and '1'. It is the underlying language of digital computers.","items":[{"title":"Binary Addition","content":"Follows simple rules: 0+0=0, 0+1=1, 1+0=1, and 1+1=10 (0 carry 1)."},{"title":"Binary Subtraction","content":"Rules are similar to decimal: 0-0=0, 1-1=0, 1-0=1, and 0-1=1 (with a borrow from the next higher-order bit)."}],"featuresTitle":"Key Concepts","features":["Base-2 numbering system.","Negative binary numbers are typically represented using Two's Complement.","Bitwise operations (AND, OR, XOR) manipulate binary at the fundamental bit level."],"applicationsTitle":"Applications","applications":["Computer Processing and CPU architectures.","Digital Logic Circuit Design.","IP Subnet addressing and masking."]}},"binaryEncoder":{"convert":{"title":"Binary Encoder/Decoder","input":"Input","output":"Output","textToBinary":"Text to Binary","binaryToText":"Binary to Text","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text or binary to convert...","outputPlaceholder":"Result will be displayed here...","binaryFormat":"Binary Format","formats":{"plain":"Plain (Continuous)","spaced":"Spaced (8 bits)","grouped":"Grouped (4 bits)"}},"error":{"invalidBinary":"Invalid Binary Input (0s and 1s only)","decodeFailed":"Decoding Failed"},"guide":{"title":"Instructions","items":["Convert text to binary ASCII/UTF-8 representation","Convert binary strings back to text","Supports plain, spaced, and grouped formatting for readability"]},"knowledge":{"title":"Binary System Knowledge","items":[{"title":"What is Binary?","content":"Binary is a base-2 numeral system used by computers, using only two symbols: 0 and 1."},{"title":"Bits and Bytes","content":"A bit is the smallest unit of data. 8 bits make a byte, which can represent a single character in ASCII."}],"featuresTitle":"Key Features","features":["Fundamental language of computers","Visualizes how data is stored at the lowest level","Supports formatted output for easier reading"],"applicationsTitle":"Common Applications","applications":["Teaching computer science concepts","Data transmission protocols","Digital logic design","Low-level programming"]}},"blowfish":{"title":"Blowfish Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"4-56 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - Electronic Codebook","cbc":"CBC - Cipher Block Chaining","cfb":"CFB - Cipher Feedback","ofb":"OFB - Output Feedback","ctr":"CTR - Counter","gcm":"GCM - Galois/Counter Mode"},"padding":{"title":"Padding Mode","pkcs7":"PKCS#7 Padding","iso97971":"ISO/IEC 9797-1 Padding","ansix923":"ANSI X.923 Padding","iso10126":"ISO 10126 Padding","zeropadding":"Zero Padding","nopadding":"No Padding"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter 16 bytes IV text","hex":"Enter 32 digits hex IV"},"generate":"Generate Random IV","error":"Invalid IV length","positionTitle":"IV Position","positionDesc":"Choose how IV is handled with ciphertext","position":{"manual":"Manual - Provide IV separately","header":"Header - Automatically prepend/extract IV at beginning","footer":"Footer - Automatically append/extract IV at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"Blowfish Knowledge","sections":[]}},"bmpConverter":{"title":"BMP Converter","description":"Convert BMP bitmap images to PNG/JPG or convert images to BMP","uploadTitle":"Upload Image","resultTitle":"Converted Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop an image file","The image will be displayed as a preview after upload","Adjust settings if available (quality, size, etc.)","Click 'Convert' to process the image","Preview the result and check the file size","Click 'Download' to save the converted file","All processing happens in your browser — no uploads"]},"knowledge":{"title":"About BMP Format","items":[{"title":"What is BMP?","content":"BMP (Bitmap Image File) is one of the oldest image formats, storing pixel data without compression. This results in very large file sizes but ensures no quality loss. BMP is commonly used in Windows applications and for raw image data storage."},{"title":"Why Convert BMP?","content":"BMP files are typically very large because they store uncompressed pixel data. Converting BMP to PNG provides lossless compression with much smaller file sizes. Converting to JPG further reduces size through lossy compression, ideal for photos."},{"title":"Format Comparison","content":"BMP stores raw pixel data (large files, no quality loss). PNG uses lossless compression (smaller files, no quality loss). JPG uses lossy compression (smallest files, some quality loss). Choose based on your quality vs size requirements."},{"title":"Browser-Based Tool","content":"This converter processes images entirely in your browser. No files are uploaded to servers, ensuring privacy. The HTML5 Canvas API handles the format conversion, providing fast and reliable results."}],"featuresTitle":"Features","features":["Convert BMP to PNG or JPG","No compression artifacts when converting to PNG","100% client-side processing","Support for large BMP files"],"applicationsTitle":"Use Cases","applications":["Converting legacy BMP files for web use","Reducing BMP file sizes for email","Preparing BMP images for modern applications","Archiving BMP files in compressed formats"]}},"calendarGenerator":{"title":"Printable Calendar Generator","description":"Generate dynamic, customizable monthly and yearly calendars.","viewType":"View Type","yearly":"Yearly Calendar","monthly":"Monthly Calendar","year":"Year","month":"Month","firstDayOfWeek":"First Day of Week","sunday":"Sunday","monday":"Monday","showHolidays":"Show US Holidays","showLunar":"Show Lunar Calendar","generate":"Generate Calendar","print":"Print Calendar","downloadImage":"Download as Image","settings":"Calendar Settings","preview":"Calendar Preview","january":"January","february":"February","march":"March","april":"April","may":"May","june":"June","july":"July","august":"August","september":"September","october":"October","november":"November","december":"December","sun":"Sun","mon":"Mon","tue":"Tue","wed":"Wed","thu":"Thu","fri":"Fri","sat":"Sat"},"certificate-decoder":{"title":"Certificate Decoder","input":{"title":"Input X.509 Certificate","placeholder":"Paste -----BEGIN CERTIFICATE-----...","decodeBtn":"Decode Certificate"},"results":{"title":"Certificate Details","subject":"Issued To (Subject)","issuer":"Issued By (Issuer)","validity":"Validity Period","san":"Subject Alternative Names (SAN)","fingerprint":"Fingerprints"}},"chacha20":{"title":"ChaCha20 Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"32 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"nonce":{"title":"Nonce","description":"12-byte random number used in GCM mode, must use different value for each encryption","placeholder":{"text":"Enter 12 bytes nonce text","hex":"Enter 24 characters hex nonce"},"generate":"Generate Random Nonce","error":"Invalid nonce length","required":"Nonce is required for GCM mode","positionTitle":"Nonce Position","positionDesc":"Choose how Nonce is handled with ciphertext","position":{"manual":"Manual - Provide Nonce separately","header":"Header - Automatically prepend/extract Nonce at beginning","footer":"Footer - Automatically append/extract Nonce at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"ChaCha20 Knowledge","sections":[]}},"charsetDetect":{"detect":{"title":"Character Encoding Detection","input":"Input","hexInputPlaceholder":"Enter hex data for encoding detection...","detectButton":"Detect","clear":"Clear","copy":"Copy","copied":"Copied","results":"Detection Results","encodingColumn":"Encoding","confidenceColumn":"Confidence","decodedText":"Decoded Text"},"error":{"detectFailed":"Detection failed"},"guide":{"title":"Instructions","items":["Enter hex-encoded data","Automatically detect possible character encodings","Shows confidence level for each encoding"]},"knowledge":{"title":"Encoding Detection Knowledge","items":[{"title":"What is Encoding Detection?","content":"Encoding detection automatically identifies the character encoding of text data by analyzing byte patterns and statistical features."},{"title":"Detection Principle","content":"Analyzes byte sequence validity, characteristic patterns, and statistical probability to determine the most likely encoding."}],"featuresTitle":"Key Features","features":["Multi-encoding detection","Confidence percentage display","Auto decode attempt"],"applicationsTitle":"Common Applications","applications":["Unknown encoding files","Data migration","Web encoding identification"]}},"chineseCalendar":{"title":"Chinese Lunar Calendar Converter","description":"Convert dates between Gregorian and Chinese Lunar Calendar.","gregorianTitle":"Gregorian Date","lunarTitle":"Lunar Date","gregorianToLunar":"Gregorian to Lunar","lunarToGregorian":"Lunar to Gregorian","selectDate":"Select Date","year":"Lunar Year","month":"Lunar Month","day":"Lunar Day","isLeapMonth":"Is Leap Month?","zodiac":"Zodiac Sign","tianganDizhi":"Stem-Branch (Gan-Zhi)","solarTerm":"Next Solar Term","convert":"Convert","today":"Today","invalidDate":"Invalid Date format","animalSign":{"rat":"Rat","ox":"Ox","tiger":"Tiger","rabbit":"Rabbit","dragon":"Dragon","snake":"Snake","horse":"Horse","goat":"Goat","monkey":"Monkey","rooster":"Rooster","dog":"Dog","pig":"Pig"},"guide":{"title":"How to Use","items":["Select the conversion direction: Gregorian to Lunar or Lunar to Gregorian.","Enter a date using the date picker or input fields.","Click 'Convert' to see the converted date, zodiac animal, and solar term.","The result shows the lunar month, day, year, zodiac sign, and nearby solar terms.","Use this tool to find auspicious dates or learn about traditional Chinese festivals."]},"knowledge":{"title":"About the Chinese Lunar Calendar","sections":[{"title":"Lunisolar System","content":"The Chinese calendar is lunisolar, combining lunar months with solar year adjustments via leap months. A standard year has 12 months; a leap year has 13."},{"title":"Solar Terms (节气)","content":"The 24 solar terms divide the solar year into equal segments, guiding agriculture and traditional festivals. Key terms include the Spring Equinox and Winter Solstice."},{"title":"Zodiac & Ganzhi Cycle","content":"Each year is associated with one of 12 zodiac animals combined with Heavenly Stems and Earthly Branches to form a 60-year Ganzhi cycle."}]}},"chmodCalculator":{"title":"Chmod Calculator","description":"Calculate Linux/Unix file permissions in octal and symbolic formats.","role":"Role","owner":"Owner","group":"Group","public":"Public / Others","read":"Read","write":"Write","execute":"Execute","octalInput":"Octal Input (e.g. 755)","linuxPermissions":"Linux Permissions","guide":{"title":"How to use","items":["Check the boxes for Read, Write, and Execute permissions for Owner, Group, and Public.","The numeric (octal) and symbolic representations will update automatically.","Alternatively, type an octal code (e.g., 755) in the input box to see the corresponding checkboxes and symbols.","Copy the 'chmod' command for use in your terminal."]},"knowledge":{"title":"About Chmod","introduction":"Chmod (change mode) is a Unix command used to change access permissions of file system objects.","items":[{"title":"Numeric (Octal)","content":"Read=4, Write=2, Execute=1. Sum these up for each role (Owner, Group, Others). Example: 7 = 4+2+1 (rwx)."},{"title":"Roles","content":"Owner: The user who owns the file. Group: Users in the file's group. Public/Others: Everyone else."},{"title":"Symbolic","content":"Represented as r (read), w (write), x (execute), and - (no permission). String format: various combinations like -rwxr-xr-x."}]}},"cidrCalculator":{"title":"CIDR Calculator","description":"Calculate IP range, netmask, first and last IP, and total hosts from a CIDR block.","input":"IP Address / CIDR","inputPlaceholder":"e.g., 192.168.1.0/24","convert":"Calculate","error":"Invalid format. Please use CIDR notation (e.g., 192.168.1.0/24).","results":{"title":"CIDR Details","range":"IP Range","netmask":"Netmask","firstIp":"First IP","lastIp":"Last IP","totalHosts":"Total Hosts"},"guide":{"title":"How to use CIDR Calculator","items":["Enter a CIDR block (e.g., 10.0.0.0/16) in the input field.","Click the 'Calculate' button.","View detailed network information including IP range and netmask."]},"knowledge":{"title":"About CIDR","items":[{"title":"What is CIDR?","content":"Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and for IP routing. It replaces the older system based on classes A, B, and C."},{"title":"CIDR Notation","content":"CIDR notation consists of an IP address, a slash ('/'), and a decimal number. The number is the count of leading 1-bits in the routing prefix mask."}],"featuresTitle":"Features","features":["Calculate Netmask","Identify First and Last IPs","Count Total Usable Hosts"],"applicationsTitle":"Applications","applications":["Network planning","Subnetting","Firewall configuration"]}},"circleCalculator":{"title":"Circle Calculator","description":"Calculate area, circumference, radius, and diameter of a circle.","keywords":"circle calculator, area of circle, circumference calculator, circle math","category":"Math","radius":"Radius (r)","diameter":"Diameter (d)","circumference":"Circumference (C)","area":"Area (A)","calculate":"Calculate","result":"Results","clear":"Clear","guide":{"title":"How to Use","items":["Enter one known value (Radius, Diameter, Circumference, or Area).","The other values will be calculated automatically."]},"knowledge":{"title":"About Circles","introduction":"A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.","items":[{"title":"Formulas","content":"Diameter = 2 * Radius\nCircumference = 2 * π * Radius\nArea = π * Radius^2"}],"featuresTitle":"Features","features":["Calculate all properties from one input","High precision using π"],"applicationsTitle":"Applications","applications":["Engineering","Architecture","Design"]}},"color-blindness":{"title":"Color Blindness Simulator","description":"Simulate how colors appear to users with various types of color blindness to optimize your design.","inputColor":"Input Color","original":"Original","types":{"protanopia":"Protanopia (Red-Blind)","deuteranopia":"Deuteranopia (Green-Blind)","tritanopia":"Tritanopia (Blue-Blind)","achromatopsia":"Achromatopsia (Total Color Blind)","protanomaly":"Protanomaly (Red-Weak)","deuteranomaly":"Deuteranomaly (Green-Weak)","tritanomaly":"Tritanomaly (Blue-Weak)","achromatomaly":"Achromatomaly (Total Color Weak)"},"guide":{"title":"Usage Guide","items":["Enter or select a base color below.","The page will automatically display simulations for various color blindness conditions.","This helps designers verify that critical information is not conveyed by color alone."]},"knowledge":{"title":"Types of Color Blindness","items":[{"title":"Red-Green Color Blindness","content":"The most common form, caused by missing or defective red or green cones, making it hard to distinguish red, green, yellow, and brown."},{"title":"Blue-Yellow Color Blindness","content":"Rarer, involves difficulty distinguishing blue from green and yellow from violet/red."}]}},"color-converter":{"title":"Color Converter","description":"Convert between various color formats","inputs":{"hex":"HEX","rgb":"RGB","hsl":"HSL","hsv":"HSV","cmyk":"CMYK"},"placeholders":{"hex":"#000000","rgb":"rgb(0, 0, 0)","hsl":"hsl(0, 0%, 0%)","hsv":"hsv(0, 0%, 0%)","cmyk":"cmyk(0%, 0%, 0%, 100%)"},"preview":"Preview","copy":"Copy","guide":{"title":"How to Use","items":["Enter a color value in any input field to automatically update all other formats.","Supports alpha channel (transparency) for formats like HEXA and RGBA.","Click the copy icon next to any input to quickly copy the value.","The preview area shows the visual result of the current color in real-time."]},"knowledge":{"title":"Color Space Knowledge","items":[{"title":"HEX (Hexadecimal)","content":"Most common format in Web dev, starts with # followed by 3, 4, 6, or 8 hex digits."},{"title":"RGB (Red Green Blue)","content":"Additive color model defining red, green, and blue light components (0-255)."},{"title":"HSL (Hue Saturation Lightness)","content":"Perceptual model easier for humans to understand than RGB, ideal for design."},{"title":"CMYK (Cyan Magenta Yellow Black)","content":"Subtractive color model primary used for color printing."}]}},"color-info":{"title":"Color Information Details","description":"Comprehensive color data query, including various color models and accessibility analysis.","input":"Input Color","formats":"Color Formats","properties":"Physical Properties","appearance":"Visual Appearance","conversion":"Multi-format Conversion","model":{"hex":"HEX","rgb":"RGB","hsl":"HSL","hsv":"HSV","cmyk":"CMYK","xyz":"XYZ","lab":"LAB","lch":"LCH"},"attrs":{"brightness":"Brightness","luminance":"Luminance","isDark":"Is Dark","isLight":"Is Light"},"guide":{"title":"Usage Guide","items":["Enter color codes in any format or use the picker.","The system converts the color values into all common color models in real-time.","View physical properties like brightness and luminance.","Useful for developers to sync colors across different platforms."]},"knowledge":{"title":"Color Theory Encyclopedia","items":[{"title":"RGB vs HSL","content":"RGB is based on the additive color mixing of Red, Green, and Blue light, ideal for screens, while HSL is more intuitive for humans (Hue, Saturation, Lightness)."},{"title":"Brightness & Luminance","content":"Brightness is a subjective perception of color intensity, whereas Luminance is a quantitative measure of light reflection efficiency."}]}},"color-mixer":{"title":"Color Mixer","description":"Mix two colors together at a specified ratio to generate a new color.","color1":"Color 1","color2":"Color 2","mixRatio":"Mix Ratio","result":"Result","guide":{"title":"Usage Guide","items":["Select 'Color 1' and 'Color 2'.","Adjust the slider to control the mixing ratio.","The center area will display the resulting color and its codes in real-time."]},"knowledge":{"title":"Color Mixing Theory","items":[{"title":"Linear Mixing","content":"Weighted average of RGB components in linear color space. The closer the ratio is to 100%, the more the result resembles that specific color."}]}},"color-wheel":{"title":"Interactive Color Wheel","description":"Visual color exploration tool for quickly finding harmonious palettes based on color wheel theory.","mode":"Color Harmony Mode","select":"Lock Color","modes":{"single":"Monochromatic","complementary":"Complementary","triadic":"Triadic","tetradic":"Tetradic","analogous":"Analogous"},"guide":{"title":"Usage Guide","items":["Rotate the points on the wheel to select the primary color.","Choose different harmony modes to see corresponding harmonious colors on the wheel.","Color boxes below will display all selected colors and their codes in real-time."]},"knowledge":{"title":"Color Harmony Encyclopedia","items":[{"title":"Complementary Principle","content":"Colors located on opposite ends of the color wheel. This combination offers the highest contrast and visual impact."},{"title":"Triadic Scheme","content":"Three colors evenly spaced around the color wheel, forming an equilateral triangle, providing a vibrant yet balanced feel."}]}},"common":{"title":"Online Calculate Tools","loading":"Loading...","error":"An error occurred, please try again","input":"Input","output":"Output","clear":"Clear","copy":"Copy","copied":"Copied","invalidInput":"Invalid Input","popularTools":"Popular Tools","popularToolsDescription":"These are the most frequently used tools","contact":"Contact Us","importantWarning":"Important Warning","contactInfo":"Contact Information","emailLabel":"Email:","subjectLabel":"Subject:","purposeLabel":"Purpose:","importantNotice":"Important Notice","privacyNotice":"We recommend that you regularly review this privacy policy to understand how we protect your information. If you have any questions about our privacy practices, please contact us at any time.","disclaimerWarning":"This disclaimer involves your legal rights and responsibilities. If you do not fully understand any of the terms, we recommend consulting a professional legal advisor before using our services. Continuing to use our services means you fully understand and accept all terms of this disclaimer.","dragOrClick":"Drag & drop an image here, or click to select","maxFileSize":"Max file size: {size}","download":"Download","convert":"Convert","converting":"Converting...","selectFile":"Select File","noFileSelected":"No file selected","conversionSuccess":"Conversion successful!","conversionError":"Conversion failed. Please try another file.","unsupportedFormat":"Unsupported file format","quality":"Quality","outputFormat":"Output Format","recentTools":"Recent Tools","recentToolsDescription":"Tools you have recently visited","clearHistory":"Clear History","processing":"Processing...","clearImage":"Clear Image","apply":"Apply","preview":"Preview","uploadToPreview":"Upload an image to see preview","originalSize":"Original Size","newSize":"New Size","width":"Width","height":"Height","aspectRatio":"Aspect Ratio","pixels":"Pixels"},"coneCalculator":{"title":"Cone Calculator","description":"Calculate volume, surface area, and slant height of a cone.","keywords":"cone calculator, volume of cone, surface area of cone, slant height","category":"Math","radius":"Radius (r)","height":"Height (h)","calculate":"Calculate","result":"Results","volume":"Volume","surfaceArea":"Total Surface Area","lateralArea":"Lateral Surface Area","slantHeight":"Slant Height (s)","clear":"Clear","guide":{"title":"How to Use","items":["Enter the radius and height.","Click 'Calculate'.","The tool will calculate Volume, Surface Area, and Slant Height."]},"knowledge":{"title":"About Cones","introduction":"A cone is a three-dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex.","items":[{"title":"Formulas","content":"Volume = (1/3) * π * r^2 * h\nSlant Height = √(r^2 + h^2)\nTotal Area = π * r * (r + s)"}],"featuresTitle":"Features","features":["Calculate volume and area","Automatic slant height calculation"],"applicationsTitle":"Applications","applications":["Funnel design","Architecture","Traffic cones"]}},"contact":{"title":"Contact Us","subtitle":"We value every user's feedback and suggestions","introduction":{"title":"Welcome to Contact Us","content":"The Online Calculator Tools team is always here to provide support and assistance. Whether you encounter technical issues during use, have feature improvement suggestions, or wish to explore business cooperation, we warmly welcome your contact.\n\nOur goal is to provide users with the best tool experience, and every piece of your feedback is very important to us."},"contactMethods":{"title":"Contact Methods","email":{"title":"Email Contact","address":"support@calctools.online","description":"This is our primary contact method, suitable for all types of inquiries and feedback","responseTime":"Usually respond within 24 hours"},"businessHours":{"title":"Business Hours","time":"Monday to Friday 9:00-18:00","note":"Emails sent outside business hours will be processed the next business day"}},"supportTypes":{"title":"How We Can Help You","categories":[{"title":"Technical Support","description":"Tool usage issues, feature inquiries, error reports","examples":["Tool feature usage guidance","Online calculator tools technical issues","Compatibility issue resolution","Error reports and bug feedback"]},{"title":"Feature Suggestions","description":"New feature requirements, improvement suggestions, user experience feedback","examples":["New tool development suggestions","Existing feature improvement opinions","Interface optimization suggestions","Performance enhancement requirements"]},{"title":"Business Cooperation","description":"Enterprise cooperation, technical licensing, custom development","examples":["Enterprise-level feature customization","Private deployment solutions","Technical licensing cooperation","OEM partnership"]},{"title":"Other Inquiries","description":"Terms of use, privacy policy, legal issues, etc.","examples":["Terms of service explanation","Privacy policy inquiries","Copyright-related issues","Legal compliance consultation"]}]},"faq":{"title":"Frequently Asked Questions","items":[{"question":"How to quickly get technical support?","answer":"Please send an email to support@calctools.online with detailed description of your problem, including the browser you're using, operating system, specific error messages, etc. We will answer as soon as possible."},{"question":"Do you provide phone support?","answer":"Currently, we primarily provide support services via email. Email allows us to better record and track issues, ensuring accurate solutions for you."},{"question":"How long does it take for feature suggestions to be adopted?","answer":"We carefully evaluate every feature suggestion. Adoption time depends on the complexity of the feature and user demand. Important and practical features will be prioritized for development."},{"question":"Do you support enterprise customization services?","answer":"Yes, we provide customization development services for enterprise users, including private deployment, exclusive feature development, etc. Please contact us via email to discuss requirements in detail."}]},"guidelines":{"title":"Contact Guidelines","tips":[{"title":"Describe the problem in detail","content":"Please describe your problem as detailed as possible, including specific steps, error messages, usage environment, etc."},{"title":"Provide relevant information","content":"If necessary, please provide screenshots, error codes, or relevant technical parameters to help us quickly locate the problem"},{"title":"Use clear email subjects","content":"Please briefly indicate the problem type in the email subject, such as \"Technical Support\", \"Feature Suggestion\", \"Business Inquiry\", etc."},{"title":"Be patient","content":"We will reply to your email as soon as possible. Complex problems may require more time for investigation and testing"}]},"feedback":{"title":"User Feedback","content":"Your feedback is the driving force for our continuous improvement. In addition to technical issues, we also welcome you to share usage experiences, provide improvement suggestions, or report discovered problems. We take every feedback seriously and consider your suggestions in product planning.","appreciation":"Thank you for choosing to use Online Calculator Tools, and thank you for every feedback and suggestion!"}},"contrast-checker":{"title":"Contrast Checker","description":"Check the contrast ratio between foreground and background colors to ensure compliance with Web Content Accessibility Guidelines (WCAG).","foreground":"Foreground Color","background":"Background Color","contrastRatio":"Contrast Ratio","score":"Score","veryPoor":"Very Poor","poor":"Poor","good":"Good","veryGood":"Very Good","wcagAA":"WCAG AA Standard","wcagAAA":"WCAG AAA Standard","normalText":"Normal Text","largeText":"Large Text","pass":"Pass","fail":"Fail","sampleText":"This is a sample preview text used to check if the contrast is comfortable and readable.","guide":{"title":"Usage Guide","items":["Select or enter the foreground color (text color).","Select or enter the background color.","The system automatically calculates the contrast ratio and provides WCAG compliance scores.","Generally, normal text requires at least 4.5:1 ratio to pass AA level."]},"knowledge":{"title":"What is Contrast Ratio?","items":[{"title":"WCAG Standards","content":"The Web Content Accessibility Guidelines (WCAG) define minimum contrast requirements for text against its background to assist users with visual impairments."},{"title":"Calculation","content":"Contrast ratio is calculated based on the relative luminance of two colors, ranging from 1:1 (no contrast) to 21:1 (maximum contrast, black and white)."}]}},"converter":{"formula":"Formula","calculation":"Calculation Process","allConversions":"All Conversions","activeUnit":"Current Unit","commonConversions":"Common Conversions","otherConversions":"Other Conversions","length":{"units":{"picometer":"Picometer","angstrom":"Angstrom","nanometer":"Nanometer","micrometer":"Micrometer","micron":"Micron","femtometer":"Femtometer","attometer":"Attometer","millimeter":"Millimeter","centimeter":"Centimeter","decimeter":"Decimeter","meter":"Meter","dekameter":"Dekameter","hectometer":"Hectometer","kilometer":"Kilometer","megameter":"Megameter","gigameter":"Gigameter","terameter":"Terameter","petameter":"Petameter","exameter":"Exameter","inch":"Inch","foot":"Foot","yard":"Yard","mile":"Mile","furlong":"Furlong","fathom":"Fathom","chain":"Chain","rod":"Rod","perch":"Perch","pole":"Pole","hand":"Hand","link":"Link","mil":"Mil","microinch":"Microinch","nautical-mile":"Nautical Mile","league":"League","nautical-league":"Nautical League","cubit":"Cubit","ell":"Ell","span":"Span","finger":"Finger","barleycorn":"Barleycorn","gongli":"Kilometer (Gongli)","li":"Li","zhang":"Zhang","chi":"Chi","cun":"Cun","fen":"Fen","li-chinese":"Li (Chinese)","hao":"Hao","lunar-distance":"Lunar Distance","astronomical-unit":"Astronomical Unit","light-year":"Light Year","parsec":"Parsec","kiloparsec":"Kiloparsec","megaparsec":"Megaparsec","point":"Point","pica":"Pica"},"knowledge":{"title":"Length Units Knowledge","items":[{"title":"Length Units Knowledge","content":"Length units are standards used to measure the distance of objects or spaces. Common length units include meters, centimeters, millimeters, kilometers, etc."},{"title":"Unit Selection for Common Scenarios","content":"Measuring body dimensions: centimeters (cm) or inches (in); Interior design: meters (m) and centimeters (cm) or feet (ft); Distance between cities: kilometers (km) or miles (mi); Maritime navigation: nautical miles (nmi); Electronic component dimensions: millimeters (mm) and micrometers (μm); Nanotechnology research: nanometers (nm); Astronomical distances: astronomical units (AU), light years (ly); Traditional crafts: chi and cun"},{"title":"International System of Units (SI)","content":"The meter is the basic unit of length in the International System of Units, originally defined as one forty-millionth of the Earth's meridian from the North Pole to the Equator. The modern definition is based on the distance light travels in a vacuum, specifically, 1 meter is the distance light travels in a vacuum in 1/299,792,458 seconds."},{"title":"Microscopic Units","content":"Picometers (10^-12 meters), nanometers (10^-9 meters), and micrometers (10^-6 meters) are mainly used in scientific research to measure extremely small objects. Nanometers are commonly used in semiconductor processes and biological research; human hair diameter is approximately 80,000 nanometers; virus sizes typically range from 20-400 nanometers"},{"title":"Metric Unit Conversion","content":"1 kilometer (km) = 1000 meters, 1 meter (m) = 10 decimeters (dm) = 100 centimeters (cm) = 1000 millimeters (mm). The metric system uses the decimal system, making it convenient for conversion and calculation."},{"title":"History of Imperial Units","content":"Imperial units originated from ancient human body measurements: the inch originally referred to the width of a thumb, the foot came from the length of a human foot, and the yard is approximately equal to one step. 1 mile was initially defined as 1000 steps, later standardized to 5280 feet. The furlong was originally the length that a group of oxen could plow without resting in ancient Roman times, approximately 201 meters."},{"title":"Imperial Unit Conversion","content":"1 mile = 8 furlongs = 1760 yards = 5280 feet = 63360 inches. A fathom equals 6 feet, primarily used for measuring water depth. 1 nautical mile is approximately equal to 1.852 kilometers, based on the arc length of 1 minute of longitude on Earth."},{"title":"Traditional Chinese Length Units","content":"Ancient Chinese measurement units include: 1 li = 150 zhang, 1 zhang = 10 chi, 1 chi = 10 cun, 1 cun = 10 fen, 1 fen = 10 li, 1 li = 10 hao. The length of chi has varied throughout history, with the modern market chi being 1/3 meter, approximately 33.33 centimeters."},{"title":"Astronomical Distance Units","content":"Cosmic scale distances use special units: Astronomical Unit (AU) is the average distance from Earth to the Sun, approximately 149.6 million kilometers; Light Year is the distance light travels in one year, approximately 9.461 trillion kilometers; Parsec is a unit based on stellar parallax measurement, 1 parsec is approximately 3.26 light years; Lunar Distance (LD) is the average distance from Earth to the Moon, approximately 384,400 kilometers"},{"title":"Interesting Length Comparisons","content":"Average human height is about 1.7 meters; Eiffel Tower is 300 meters tall; Mount Everest is 8848.86 meters high; Mariana Trench is about 11 kilometers deep; Earth's equatorial circumference is about 40,075 kilometers; Light travels about 300,000 kilometers per second; The closest star Proxima Centauri is about 4.22 light years away"},{"title":"Applications of Length Units in Science","content":"Nanotechnology for manipulating materials at atomic scale; Material science uses angstroms (Å) to measure lattice constants, 1 Å = 0.1 nanometer; Medical imaging observes cells with micrometer precision; Geographical measurements use kilometers; Astronomy uses light years and parsecs to measure interstellar distances"},{"title":"Historical Development of Length Measurement","content":"From ancient human body measurements, to the metric standard pioneered by France in the 18th century, to modern precise definitions based on physical constants, length measurement standards have undergone a long evolution. Laser interferometry measurements can achieve nanometer precision, and GPS systems can precisely locate to centimeter level."}]}},"weight":{"units":{"gram":"Gram","kilogram":"Kilogram","milligram":"Milligram","ton-metric":"Metric Ton","megagram":"Megagram","tonne":"Tonne","microgram":"Microgram","nanogram":"Nanogram","picogram":"Picogram","femtogram":"Femtogram","attogram":"Attogram","dalton":"Dalton","dekagram":"Dekagram","hectogram":"Hectogram","decigram":"Decigram","centigram":"Centigram","kiloton-metric":"Kiloton","quintal-metric":"Quintal","ounce":"Ounce","pound":"Pound","stone":"Stone","ton-short":"Short Ton (US)","ton-long":"Long Ton (UK)","hundredweight-us":"Hundredweight (US)","hundredweight-uk":"Hundredweight (UK)","quarter-us":"Quarter (US)","quarter-uk":"Quarter (UK)","carat":"Carat","grain":"Grain","pennyweight":"Pennyweight","troy-ounce":"Troy Ounce","troy-pound":"Troy Pound","scruple":"Scruple","jin":"Jin","liang":"Liang","qian":"Qian","fen-weight":"Fen","li-weight":"Li","hao-weight":"Hao","si":"Si","hu":"Hu","dan":"Dan","jun":"Jun","shi":"Shi","atomic-mass-unit":"Atomic Mass Unit","electron-mass":"Electron Mass","proton-mass":"Proton Mass","neutron-mass":"Neutron Mass","planck-mass":"Planck Mass"},"knowledge":{"title":"Weight Unit Knowledge","items":[{"title":"Weight Unit Basics","content":"Weight units are standards for measuring the mass of objects. The basic unit of mass in the International System of Units (SI) is the kilogram (kg)."},{"title":"Metric and Imperial Units","content":"Metric weight units include grams, kilograms, tonnes, etc., increasing by factors of 10. Imperial weight units include ounces, pounds, stones, etc., with more complex conversion relationships."},{"title":"Common Conversion Ratios","content":"1 kilogram = 1000 grams; 1 pound ≈ 453.59 grams; 1 ounce ≈ 28.35 grams; 1 metric ton = 1000 kilograms; 1 carat = 0.2 grams."},{"title":"Precious Metal Measurement","content":"Precious metals often use special units of measurement, such as carats (for gems) and troy ounces (for precious metals). Troy units differ from standard weight units."},{"title":"Traditional Chinese Weight Units","content":"Traditional Chinese weight units include: 1 Jin = 10 Liang = 500 grams; 1 Liang = 10 Qian = 50 grams; 1 Qian = 10 Fen = 5 grams; 1 Fen = 10 Li = 0.5 grams, and so on. Other common units include Dan (50 kg), Jun (30 kg), and Shi (100 kg)."},{"title":"Scientific Measurement Units","content":"Mass units used in scientific research include atomic mass units, electron mass, etc., primarily used to measure the mass of subatomic particles and microscopic matter."}]}},"area":{"units":{"square-meter":"Square Meter","square-kilometer":"Square Kilometer","square-centimeter":"Square Centimeter","square-millimeter":"Square Millimeter","square-micrometer":"Square Micrometer","square-nanometer":"Square Nanometer","hectare":"Hectare","are":"Are","square-decimeter":"Square Decimeter","square-mile":"Square Mile","square-yard":"Square Yard","square-foot":"Square Foot","square-inch":"Square Inch","acre":"Acre","square-rod":"Square Rod","mu":"Mu","qing":"Qing","fen":"Fen","square-chi":"Square Chi","square-cun":"Square Cun"},"knowledge":{"title":"Area Unit Knowledge","items":[{"title":"Area Unit Basics","content":"Area units are standards for measuring the size of two-dimensional surfaces. The basic unit of area in the International System of Units (SI) is the square meter (m²), defined as the area of a square with sides of 1 meter."},{"title":"Metric and Imperial Area Units","content":"Metric area units include square meters, hectares, square kilometers, etc., increasing by factors of 10. Imperial area units include square feet, square yards, acres, etc., with more complex conversion relationships."},{"title":"Common Conversion Ratios","content":"1 square kilometer = 100 hectares = 1,000,000 square meters; 1 hectare = 10,000 square meters; 1 acre ≈ 4,047 square meters; 1 square foot ≈ 0.093 square meters; 1 square inch ≈ 6.45 square centimeters."},{"title":"Land Area Measurement","content":"Common units for land area include hectares, acres, and mu. 1 hectare equals 10,000 square meters; 1 acre is approximately 0.4047 hectares; traditional Chinese mu is about 666.67 square meters."},{"title":"Scientific and Engineering Applications","content":"In scientific research and engineering, area units are used to measure surface area, land area, cross-sectional area, and more. Different scales use different units, from microscopic square nanometers to macroscopic square kilometers."}]}},"volume":{"units":{"cubic-meter":"Cubic Meter","cubic-kilometer":"Cubic Kilometer","cubic-centimeter":"Cubic Centimeter","cubic-millimeter":"Cubic Millimeter","liter":"Liter","milliliter":"Milliliter","cubic-decimeter":"Cubic Decimeter","hectoliter":"Hectoliter","dekaliter":"Dekaliter","deciliter":"Deciliter","centiliter":"Centiliter","microliter":"Microliter","gallon-us":"US Gallon","gallon-uk":"UK Gallon","quart-us":"US Quart","quart-uk":"UK Quart","pint-us":"US Pint","pint-uk":"UK Pint","cup-us":"US Cup","cup-metric":"Metric Cup","fluid-ounce-us":"US Fluid Ounce","fluid-ounce-uk":"UK Fluid Ounce","tablespoon-us":"US Tablespoon","tablespoon-metric":"Metric Tablespoon","teaspoon-us":"US Teaspoon","teaspoon-metric":"Metric Teaspoon","cubic-mile":"Cubic Mile","cubic-yard":"Cubic Yard","cubic-foot":"Cubic Foot","cubic-inch":"Cubic Inch","barrel-oil":"Oil Barrel","barrel-us":"US Barrel","acre-foot":"Acre-foot"},"knowledge":{"title":"Volume Unit Knowledge","items":[{"title":"Volume Unit Basics","content":"Volume units are standards for measuring the size of three-dimensional space. The basic unit of volume in the International System of Units (SI) is the cubic meter (m³), defined as the volume of a cube with sides of 1 meter."},{"title":"Metric and Imperial Volume Units","content":"Metric volume units include cubic meters, liters, cubic centimeters, etc., increasing by factors of 10. Imperial volume units include cubic feet, gallons, pints, etc., with more complex conversion relationships. 1 liter equals 0.001 cubic meters; 1 US gallon is approximately 3.785 liters; 1 UK gallon is approximately 4.546 liters."},{"title":"Common Liquid Volume Units","content":"Common units for liquid volume include liters, milliliters, gallons, pints, etc. 1 liter = 1000 milliliters; 1 US gallon = 128 US fluid ounces = 3.785 liters; 1 UK gallon = 160 UK fluid ounces = 4.546 liters; 1 US pint = 16 US fluid ounces = 473 milliliters."},{"title":"Cubic Unit Conversions","content":"Cubic units represent the volume of three-dimensional space. 1 cubic meter = 1000 liters = 1,000,000 cubic centimeters; 1 cubic foot ≈ 28.317 liters ≈ 0.028 cubic meters; 1 cubic inch ≈ 16.387 cubic centimeters."},{"title":"Volume Units in Cooking","content":"In cooking, common volume units include cups, tablespoons, teaspoons, etc. 1 metric cup = 250 milliliters; 1 US cup ≈ 237 milliliters; 1 metric tablespoon = 15 milliliters; 1 metric teaspoon = 5 milliliters. Note that cooking measurement units may vary between different countries."}]}},"speed":{"units":{"meter-per-second":"Meter per second","kilometer-per-hour":"Kilometer per hour","kilometer-per-second":"Kilometer per second","centimeter-per-second":"Centimeter per second","millimeter-per-second":"Millimeter per second","meter-per-minute":"Meter per minute","kilometer-per-minute":"Kilometer per minute","mile-per-hour":"Mile per hour","mile-per-second":"Mile per second","mile-per-minute":"Mile per minute","foot-per-second":"Foot per second","foot-per-minute":"Foot per minute","foot-per-hour":"Foot per hour","yard-per-second":"Yard per second","inch-per-second":"Inch per second","knot":"Knot","mach":"Mach","speed-of-light":"Speed of light"},"knowledge":{"title":"Speed Unit Knowledge","items":[{"title":"Speed Unit Basics","content":"Speed units are standards for measuring how fast an object moves. The basic unit of speed in the International System of Units (SI) is meters per second (m/s), which represents a distance of 1 meter traveled in 1 second."},{"title":"Common Speed Unit Conversions","content":"1 meter per second (m/s) = 3.6 kilometers per hour (km/h) = 2.237 miles per hour (mph); 1 kilometer per hour (km/h) = 0.278 meters per second (m/s) = 0.621 miles per hour (mph); 1 mile per hour (mph) = 1.609 kilometers per hour (km/h) = 0.447 meters per second (m/s); 1 knot = 1.852 kilometers per hour (km/h) = 0.514 meters per second (m/s)."},{"title":"Special Speed Units","content":"Mach is a dimensionless unit representing the ratio of an object's speed to the speed of sound, which is approximately 340.29 meters per second at standard conditions (15°C, sea level); The speed of light (c) is the ultimate speed limit in the universe, approximately 299,792,458 meters per second."},{"title":"Difference Between Speed and Velocity","content":"In physics, speed is a scalar quantity with only magnitude, while velocity is a vector with both magnitude and direction. The speed units in everyday use typically refer to the rate, which is the distance moved per unit time, regardless of direction."},{"title":"Speed Units in Various Fields","content":"Aviation commonly uses knots and Mach; maritime navigation primarily uses knots; land transportation uses kilometers per hour (km/h) or miles per hour (mph); scientific research often uses meters per second (m/s); computer network transmission speed commonly uses bits per second (bps) or bytes per second (Bps)."}]}},"temperature":{"units":{"celsius":"Celsius","fahrenheit":"Fahrenheit","kelvin":"Kelvin","rankine":"Rankine","reaumur":"Réaumur","newton":"Newton"},"knowledge":{"title":"Temperature Unit Knowledge","items":[{"title":"Temperature Unit Basics","content":"Temperature is a physical quantity expressing the degree of heat of an object. The basic unit of temperature in the International System of Units (SI) is Kelvin (K), but Celsius (°C) and Fahrenheit (°F) are more commonly used in daily life."},{"title":"Celsius (°C)","content":"Proposed by Swedish astronomer Anders Celsius, it sets the freezing point of water at 0°C and the boiling point at 100°C. Celsius is used in most countries around the world for meteorology, scientific research, and everyday life."},{"title":"Fahrenheit (°F)","content":"Proposed by German physicist Daniel Gabriel Fahrenheit, it sets the freezing point of water at 32°F and the boiling point at 212°F. Fahrenheit is primarily used in the United States and a few other countries, especially in meteorology and daily life."},{"title":"Kelvin (K)","content":"Proposed by British physicist William Thomson (Lord Kelvin), it is based on absolute zero (the theoretical lowest temperature). Zero Kelvin (0K) corresponds to about -273.15°C and is the fundamental temperature unit used in scientific research. Kelvin has no negative values and does not use the term 'degree'."},{"title":"Temperature Unit Conversion","content":"Celsius to Fahrenheit conversion: °F = °C × 9/5 + 32 or °C = (°F - 32) × 5/9; Celsius to Kelvin conversion: K = °C + 273.15 or °C = K - 273.15; Fahrenheit to Kelvin conversion: K = (°F + 459.67) × 5/9 or °F = K × 9/5 - 459.67."}]}},"time":{"units":{"second":"Second","millisecond":"Millisecond","microsecond":"Microsecond","nanosecond":"Nanosecond","picosecond":"Picosecond","minute":"Minute","hour":"Hour","day":"Day","week":"Week","month":"Month","year":"Year","decade":"Decade","century":"Century","sidereal-day":"Sidereal Day","sidereal-year":"Sidereal Year","tropical-year":"Tropical Year","lunar-month":"Lunar Month","leap-year":"Leap Year","fortnight":"Fortnight","quarter":"Quarter","olympiad":"Olympiad","shake":"Shake","jiffy":"Jiffy"},"knowledge":{"title":"Time Unit Knowledge","items":[{"title":"Basic Time Units","content":"Time is a fundamental physical quantity that measures the duration of events. The basic time unit in the International System of Units (SI) is the second (s), with other common units including minutes (min), hours (h), days (d), weeks (wk), months (mo), and years (yr)."},{"title":"Definition of Second","content":"The second is the modern base unit of time. According to the SI definition, 1 second equals the duration of 9,192,631,770 periods of the radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom."},{"title":"Common Time Unit Conversions","content":"1 minute = 60 seconds; 1 hour = 60 minutes = 3,600 seconds; 1 day = 24 hours = 1,440 minutes = 86,400 seconds; 1 week = 7 days = 168 hours = 604,800 seconds; 1 month (average) ≈ 30.44 days ≈ 2,629,746 seconds; 1 year (Gregorian) = 365 days or 366 days (leap year) ≈ 31,536,000 seconds; 1 century = 100 years."},{"title":"Microscopic Time Units","content":"Millisecond (ms) = 1/1,000 second; Microsecond (μs) = 1/1,000,000 second; Nanosecond (ns) = 1/1,000,000,000 second; Picosecond (ps) = 1/1,000,000,000,000 second. These units are widely used in computer science, physics, and electrical engineering."},{"title":"Special Time Units","content":"A sidereal day is the time it takes Earth to rotate once relative to the stars rather than the Sun, approximately 23 hours 56 minutes 4 seconds; A sidereal year is the time it takes Earth to orbit the Sun once, approximately 365.25636 days; A tropical year is the interval between two successive vernal equinoxes, approximately 365.24219 days; A shake is a unit of time used in nuclear physics, equal to 10 nanoseconds."}]}},"energy":{"units":{"joule":"Joule","kilojoule":"Kilojoule","megajoule":"Megajoule","gigajoule":"Gigajoule","terajoule":"Terajoule","millijoule":"Millijoule","microjoule":"Microjoule","nanojoule":"Nanojoule","calorie":"Calorie","kilocalorie":"Kilocalorie","food-calorie":"Food Calorie","btu":"British Thermal Unit","mbtu":"Million BTU","watt-hour":"Watt-hour","kilowatt-hour":"Kilowatt-hour","megawatt-hour":"Megawatt-hour","gigawatt-hour":"Gigawatt-hour","erg":"Erg","electronvolt":"Electronvolt","kiloelectronvolt":"Kiloelectronvolt","megaelectronvolt":"Megaelectronvolt","ton-tnt":"Ton of TNT","kiloton-tnt":"Kiloton of TNT","megaton-tnt":"Megaton of TNT","barrel-oil":"Barrel of Oil Equivalent","ton-coal":"Ton of Coal Equivalent","ton-oil":"Ton of Oil Equivalent","therm":"Therm","foot-pound":"Foot-pound","newton-meter":"Newton-meter"},"knowledge":{"title":"Energy Unit Knowledge","items":[{"title":"Basic Energy Units","content":"Energy is a physical quantity that represents the capacity to do work. The basic energy unit in the International System of Units (SI) is the joule (J), defined as the work done by a force of 1 newton moving an object 1 meter in the direction of the force."},{"title":"Common Energy Unit Conversions","content":"1 kilojoule (kJ) = 1000 joules (J); 1 calorie (cal) = 4.184 joules (J); 1 kilocalorie (kcal) = 4184 joules (J); 1 kilowatt-hour (kWh) = 3,600,000 joules (J) = 3.6 megajoules (MJ); 1 British Thermal Unit (BTU) = 1055.06 joules (J); 1 electronvolt (eV) = 1.602176634×10^-19 joules (J)."},{"title":"Heat Units","content":"Calories (cal) and British Thermal Units (BTU) are primarily used to measure heat energy. The food calorie (Cal, also known as the large calorie) is actually a kilocalorie (kcal), commonly used in food nutrition labels. 1 kilocalorie (kcal) = 1 food calorie (Cal) = 4.184 kilojoules (kJ); 1 BTU is the amount of heat needed to raise the temperature of 1 pound of water by 1°F."},{"title":"Electrical Energy Units","content":"Watt-hours (Wh) and kilowatt-hours (kWh) are common units for electrical energy. 1 watt-hour represents the energy consumed by a device with a power of 1 watt operating for 1 hour, equal to 3600 joules. The kilowatt-hour is the standard unit for electricity billing, with 1 kilowatt-hour (kWh) = 1000 watt-hours (Wh) = 3.6 megajoules (MJ)."},{"title":"Energy Resource Units","content":"Ton of oil equivalent (toe), ton of coal equivalent (tce), and TNT equivalent are units for measuring large-scale energy resources and explosive energy. 1 ton of oil equivalent is approximately 41.868 gigajoules; 1 ton of TNT equivalent is approximately 4.184 gigajoules, commonly used to express nuclear weapon yields; Barrel of oil equivalent is used in the petroleum industry, with 1 barrel of oil being approximately 6.1 gigajoules."},{"title":"Energy Units in Different Fields","content":"In physics, joules (J) and ergs are commonly used; In nutrition, calories (cal) and kilocalories (kcal) are used; The power industry uses kilowatt-hours (kWh) and megawatt-hours (MWh); Nuclear physics uses electronvolts (eV) and its multiples; The energy industry uses barrels of oil equivalent, tons of oil equivalent, etc.; The HVAC industry commonly uses British Thermal Units (BTU)."}]}},"angle":{"units":{"degree":"Degree","radian":"Radian","grad":"Grad","milliradian":"Milliradian","turn":"Turn","revolution":"Revolution","degree-minute-second":"Degree-Minute-Second"},"dms":{"degrees":"Degrees","minutes":"Minutes","seconds":"Seconds","degreesShort":"°","minutesShort":"'","secondsShort":"\"","inputPlaceholder":{"degrees":"Enter degrees","minutes":"Enter minutes","seconds":"Enter seconds"}},"knowledge":{"title":"Angle Unit Knowledge","items":[{"title":"Angle Unit Basics","content":"An angle is a physical quantity used to measure the size of the angle between two rays. Common angle units include degrees (°), radians (rad), grads, etc. The degree is the most commonly used angle unit, with a complete circle equal to 360 degrees."},{"title":"Relationship Between Degrees and Radians","content":"The radian is the standard angle unit in the International System of Units. One radian equals the central angle subtended by an arc whose length equals the radius. A full circle is 2π radians, so: 1 radian = 180°/π ≈ 57.2958°; 1 degree = π/180 radians ≈ 0.01745 radians."},{"title":"Degree-Minute-Second System","content":"Degrees-minutes-seconds is a precise representation of angles, commonly used in geographic coordinates, astronomy, and surveying. 1 degree = 60 arcminutes, 1 arcminute = 60 arcseconds. For example: 45°30'15\" represents 45 degrees, 30 minutes, 15 seconds. This system can be precise to the arcsecond level."},{"title":"Grad Unit","content":"The grad (also called gon) is another angle unit. A complete circle equals 400 grads. 1 grad = 0.9 degrees = π/200 radians. The grad unit is relatively common in surveying and engineering applications in some European countries."},{"title":"Angle Unit Conversions","content":"Common angle unit conversions: 360 degrees = 2π radians = 400 grads = 1 turn; 90 degrees = π/2 radians = 100 grads = 1/4 turn; 180 degrees = π radians = 200 grads = 1/2 turn; 1 milliradian = 0.001 radians ≈ 0.0573 degrees."},{"title":"Angles in Different Fields","content":"Geometry and trigonometry mainly use degrees and radians; Geography and navigation commonly use degree-minute-second format for latitude and longitude; Engineering selects appropriate units based on precision requirements; Physics calculations typically use radians; Computer graphics commonly use degrees for rotation angles; Astronomy uses degrees-minutes-seconds for celestial positions."},{"title":"Angle Measurement Precision","content":"Different applications require different angle precision: General measurements use degrees with ~0.1° precision; Engineering surveys use degree-minute-second with 1\" precision; High-precision measurements use radians with micro-radian precision; GPS positioning systems achieve angle precision within 0.1\"; Astronomical observations can achieve milli-arcsecond precision."}]}},"pressure":{"units":{"pascal":"Pascal","kilopascal":"Kilopascal","megapascal":"Megapascal","bar":"Bar","millibar":"Millibar","psi":"Pound per Square Inch (PSI)","atmosphere":"Atmosphere","mmhg":"Millimeter of Mercury (mmHg)","torr":"Torr","inch-hg":"Inch of Mercury (inHg)"},"knowledge":{"title":"Pressure Unit Knowledge","items":[{"title":"Pressure Unit Basics","content":"Pressure is defined as force per unit area. The SI unit of pressure is the Pascal (Pa), equal to 1 Newton per square meter (N/m²). Other common units include bar, psi, atm, and mmHg."},{"title":"Common Pressure Conversions","content":"1 atm = 101,325 Pa = 1.01325 bar = 14.696 psi = 760 mmHg = 760 Torr. 1 bar = 100,000 Pa = 0.9869 atm = 14.504 psi. 1 psi = 6,894.76 Pa = 51.715 mmHg."},{"title":"Pascal (Pa)","content":"The Pascal is the SI unit of pressure, named after mathematician and physicist Blaise Pascal. 1 Pa is a very small pressure; atmospheric pressure is about 101,325 Pa. Kilopascal (kPa) and megapascal (MPa) are commonly used in engineering."},{"title":"mmHg and Torr","content":"Millimeter of mercury (mmHg) is used in medicine for blood pressure measurement. Normal blood pressure is about 120/80 mmHg. The Torr is nearly identical to mmHg (1 Torr = 133.322 Pa), named after Evangelista Torricelli."},{"title":"PSI in Engineering","content":"PSI (pounds per square inch) is widely used in the US for tire pressure, hydraulic systems, and industrial equipment. Standard tire pressure is typically 30–35 PSI. 1 psi ≈ 6,895 Pa."}]}},"power":{"units":{"watt":"Watt","kilowatt":"Kilowatt","megawatt":"Megawatt","gigawatt":"Gigawatt","milliwatt":"Milliwatt","horsepower":"Horsepower (Imperial)","horsepower-metric":"Horsepower (Metric, PS)","btu-per-hour":"BTU per Hour","calorie-per-second":"Calorie per Second","foot-pound-per-second":"Foot-pound per Second"},"knowledge":{"title":"Power Unit Knowledge","items":[{"title":"Power Unit Basics","content":"Power is the rate at which energy is transferred or work is done. The SI unit of power is the Watt (W), equal to 1 Joule per second. Common units include kilowatt (kW), megawatt (MW), and horsepower (hp)."},{"title":"Common Power Conversions","content":"1 horsepower (imperial) = 745.7 W; 1 metric horsepower (PS) = 735.5 W; 1 kW = 1000 W = 1.341 hp; 1 BTU/h = 0.2931 W."},{"title":"Horsepower","content":"Horsepower was defined by James Watt to compare steam engine output with horse work. Imperial horsepower = 550 ft·lbf/s = 745.7 W. Metric horsepower (PS or CV) = 75 kgf·m/s = 735.5 W. Used widely for vehicle engines."},{"title":"Watt and Kilowatt","content":"The Watt is named after James Watt. Household appliances are rated in watts: a light bulb uses 60W, a microwave 1000W. Power plants generate gigawatts (GW). 1 kW = 1000 W, 1 MW = 1,000,000 W."},{"title":"Power in Daily Life","content":"Electricity bills are based on energy (kWh = kilowatt-hour). A 1 kW device running for 1 hour consumes 1 kWh. Electric vehicles typically have motors of 50–300 kW. Large power stations generate 1,000 MW or more."}]}},"data":{"units":{"bit":"Bit","byte":"Byte","kilobyte":"Kilobyte (KB)","megabyte":"Megabyte (MB)","gigabyte":"Gigabyte (GB)","terabyte":"Terabyte (TB)","petabyte":"Petabyte (PB)","kibibyte":"Kibibyte (KiB)","mebibyte":"Mebibyte (MiB)","gibibyte":"Gibibyte (GiB)","tebibyte":"Tebibyte (TiB)","nibble":"Nibble"},"knowledge":{"title":"Data Storage Unit Knowledge","items":[{"title":"Data Unit Basics","content":"Digital data is stored and measured in bits and bytes. A bit (binary digit) is the smallest unit of data (0 or 1). A byte consists of 8 bits and can represent 256 different values."},{"title":"Decimal vs Binary Prefixes","content":"Two systems exist: decimal (SI) uses powers of 1000 (KB = 1,000 bytes), while binary (IEC) uses powers of 1024 (KiB = 1,024 bytes). Hard drive manufacturers use decimal; operating systems often use binary. This causes apparent size discrepancies."},{"title":"Common Storage Sizes","content":"1 KB = 1,000 bytes (decimal) or 1,024 bytes (binary); 1 MB = 1,000,000 bytes; 1 GB = 1,000,000,000 bytes; 1 TB = 1,000,000,000,000 bytes. A typical smartphone has 128 GB–1 TB storage."},{"title":"Data Transmission","content":"Network speeds are measured in bits per second (bps). 1 Mbps = 1,000,000 bits/s. To download a 1 GB file at 100 Mbps: 1 GB = 8 Gb, so 8,000 Mb / 100 Mbps = 80 seconds."},{"title":"IEC Binary Units","content":"The IEC introduced binary prefixes to avoid confusion: kibibyte (KiB) = 1,024 bytes, mebibyte (MiB) = 1,048,576 bytes, gibibyte (GiB) = 1,073,741,824 bytes, tebibyte (TiB) = 1,099,511,627,776 bytes."}]}},"frequency":{"units":{"hertz":"Hertz (Hz)","kilohertz":"Kilohertz (kHz)","megahertz":"Megahertz (MHz)","gigahertz":"Gigahertz (GHz)","terahertz":"Terahertz (THz)","millihertz":"Millihertz (mHz)","rpm":"Revolutions per Minute (RPM)","rps":"Revolutions per Second (RPS)"},"knowledge":{"title":"Frequency Unit Knowledge","items":[{"title":"Frequency Unit Basics","content":"Frequency measures how often a periodic event occurs per unit of time. The SI unit is Hertz (Hz), equal to one cycle per second, named after Heinrich Hertz. Common multiples include kHz, MHz, GHz, and THz."},{"title":"Common Frequency Conversions","content":"1 kHz = 1,000 Hz; 1 MHz = 1,000,000 Hz; 1 GHz = 1,000,000,000 Hz; 1 THz = 10^12 Hz. 1 RPM = 1/60 Hz ≈ 0.01667 Hz."},{"title":"Radio and Wireless Frequencies","content":"AM radio: 530–1700 kHz; FM radio: 88–108 MHz; WiFi 2.4 GHz and 5 GHz bands; Bluetooth: 2.4 GHz; 5G cellular: 24–86 GHz. Mobile phones use frequencies from 700 MHz to 86 GHz depending on the network."},{"title":"Processor Frequencies","content":"Modern CPU clock speeds are measured in GHz. A 3.5 GHz processor executes 3,500,000,000 clock cycles per second. Early computers operated at MHz frequencies. GPU shader units can operate at similar or higher clock speeds."},{"title":"RPM in Mechanical Applications","content":"RPM (revolutions per minute) measures rotational speed. Car engines typically idle at 600–1000 RPM and rev up to 5000–8000 RPM. Electric motors can operate from a few hundred to tens of thousands of RPM. Hard drives spin at 5,400–7,200 RPM."}]}},"illuminance":{"units":{"lux":"Lux (lx)","foot-candle":"Foot-candle (fc)","phot":"Phot (ph)","nox":"Nox (nx)","lumen-per-square-meter":"Lumen per Square Meter (lm/m²)"},"knowledge":{"title":"Illuminance Unit Knowledge","items":[{"title":"Illuminance Basics","content":"Illuminance measures the amount of light hitting a surface. The SI unit is the lux (lx), equal to 1 lumen per square meter (lm/m²). It describes how well-lit an environment is, not the brightness of the light source."},{"title":"Common Illuminance Levels","content":"Typical illuminance values: Full sunlight: 100,000 lux; Overcast day: 1,000 lux; Office lighting: 300–500 lux; Living room: 50–100 lux; Moonlit night: 0.1 lux; Starry night: 0.001 lux."},{"title":"Foot-candle vs Lux","content":"The foot-candle (fc) is an imperial unit still used in photography and the US construction industry. 1 foot-candle = 10.764 lux. It represents the illuminance from 1 candela at a distance of 1 foot."},{"title":"Applications of Illuminance","content":"Lighting standards specify minimum illuminance for different environments: Surgery rooms: 10,000–20,000 lux; Detailed workshop tasks: 1,000 lux; Office work: 300–500 lux; Corridors: 50–100 lux. Proper lighting improves safety and productivity."}]}},"force":{"units":{"newton":"Newton (N)","kilonewton":"Kilonewton (kN)","meganewton":"Meganewton (MN)","pound-force":"Pound-force (lbf)","kilogram-force":"Kilogram-force (kgf)","gram-force":"Gram-force (gf)","dyne":"Dyne (dyn)","poundal":"Poundal (pdl)","ounce-force":"Ounce-force (ozf)","ton-force":"Ton-force (tf)"},"knowledge":{"title":"Force Unit Knowledge","items":[{"title":"Force Unit Basics","content":"Force is a physical quantity that causes objects to accelerate. The SI unit of force is the Newton (N), defined as the force required to accelerate a 1 kg mass at 1 m/s²."},{"title":"Common Force Conversions","content":"1 kgf = 9.80665 N (force of gravity on 1 kg at Earth's surface); 1 lbf = 4.44822 N; 1 kN = 1000 N; 1 dyne = 10^-5 N (CGS unit). 1 ton-force = 9,806.65 N."},{"title":"Newton (SI Unit)","content":"Named after Isaac Newton, 1 N is approximately the force needed to hold a 100g apple. In structural engineering, forces are often measured in kilonewtons (kN) or meganewtons (MN). Bridges are designed to handle millions of Newtons."},{"title":"Kilogram-force (kgf)","content":"The kilogram-force is the gravitational force on a 1 kg mass at standard gravity. 1 kgf = 9.80665 N. Although not an SI unit, it is still used in some technical fields. Weight in kgf numerically equals mass in kg."},{"title":"Applications in Engineering","content":"Forces are central to structural, mechanical, and aerospace engineering. Aircraft lift and drag forces are measured in kilonewtons. Rocket thrust is measured in kilonewtons to meganewtons. Bolt preload in cars is typically 10–100 N·m of torque."}]}},"torque":{"units":{"newton-meter":"Newton-meter (N·m)","newton-centimeter":"Newton-centimeter (N·cm)","kilonewton-meter":"Kilonewton-meter (kN·m)","kilogram-meter":"Kilogram-force-meter (kgf·m)","kilogram-centimeter":"Kilogram-force-centimeter (kgf·cm)","gram-centimeter":"Gram-force-centimeter (gf·cm)","pound-foot":"Pound-force-foot (lbf·ft)","pound-inch":"Pound-force-inch (lbf·in)","ounce-inch":"Ounce-force-inch (ozf·in)","dyne-centimeter":"Dyne-centimeter (dyn·cm)"},"knowledge":{"title":"Torque Unit Knowledge","items":[{"title":"Torque Basics","content":"Torque (or moment of force) measures the rotational force applied to an object. The SI unit is the Newton-meter (N·m). Torque = Force × distance from the pivot point."},{"title":"Common Torque Conversions","content":"1 N·m = 0.7376 lbf·ft = 8.851 lbf·in = 0.10197 kgf·m. 1 kgf·m = 9.80665 N·m. 1 lbf·ft = 1.35582 N·m."},{"title":"Automotive Torque","content":"Engine torque is measured in N·m or lbf·ft. A typical passenger car engine produces 150–400 N·m. Lug nut torque specifications are typically 80–130 N·m. High-performance cars can exceed 700 N·m."},{"title":"Torque Wrenches","content":"Torque wrenches are used to apply precise torque for bolts and fasteners. They typically range from 5–600 N·m for automotive work. Smaller torque screwdrivers measure in N·cm or lbf·in for electronics and precision work."},{"title":"Structural Applications","content":"In civil and structural engineering, large torques are measured in kilonewton-meters (kN·m). Bridge supports and building columns must resist significant torque loads from wind and seismic forces."}]}},"density":{"units":{"kilogram-per-cubic-meter":"Kilogram per Cubic Meter (kg/m³)","gram-per-cubic-centimeter":"Gram per Cubic Centimeter (g/cm³)","gram-per-liter":"Gram per Liter (g/L)","kilogram-per-liter":"Kilogram per Liter (kg/L)","pound-per-cubic-foot":"Pound per Cubic Foot (lb/ft³)","pound-per-cubic-inch":"Pound per Cubic Inch (lb/in³)","pound-per-gallon-us":"Pound per US Gallon (lb/gal)","ounce-per-cubic-inch":"Ounce per Cubic Inch (oz/in³)","slug-per-cubic-foot":"Slug per Cubic Foot (slug/ft³)"},"knowledge":{"title":"Density Unit Knowledge","items":[{"title":"Density Basics","content":"Density is mass per unit volume. The SI unit is kg/m³. Water has a density of 1,000 kg/m³ (or 1 g/cm³). Materials denser than water sink; less dense materials float."},{"title":"Common Material Densities","content":"Water: 1,000 kg/m³; Air: 1.225 kg/m³; Steel: 7,850 kg/m³; Aluminum: 2,700 kg/m³; Gold: 19,320 kg/m³; Wood (varies): 400–900 kg/m³; Concrete: 2,300 kg/m³."},{"title":"Density Units Comparison","content":"1 g/cm³ = 1,000 kg/m³ = 1 kg/L. Iron has density of about 7.87 g/cm³. Lead is 11.34 g/cm³. Mercury (liquid) is 13.534 g/cm³, which is why it sinks most metals."},{"title":"Applications of Density","content":"Density is critical in material selection, buoyancy calculations, and quality control. In metallurgy, density helps identify alloys. In fluids engineering, density affects flow behavior. Aviation relies on density altitude for performance calculations."}]}},"flow-rate":{"units":{"cubic-meter-per-second":"Cubic Meter per Second (m³/s)","cubic-meter-per-minute":"Cubic Meter per Minute (m³/min)","cubic-meter-per-hour":"Cubic Meter per Hour (m³/h)","liter-per-second":"Liter per Second (L/s)","liter-per-minute":"Liter per Minute (L/min)","liter-per-hour":"Liter per Hour (L/h)","gallon-per-minute-us":"US Gallon per Minute (gal/min)","gallon-per-hour-us":"US Gallon per Hour (gal/h)","cubic-foot-per-minute":"Cubic Foot per Minute (CFM)","cubic-foot-per-second":"Cubic Foot per Second (CFS)","barrel-per-day-oil":"Oil Barrel per Day (bbl/d)"},"knowledge":{"title":"Flow Rate Unit Knowledge","items":[{"title":"Flow Rate Basics","content":"Flow rate (volumetric flow rate) measures the volume of fluid passing through a cross-section per unit time. The SI unit is cubic meters per second (m³/s). Common units include liters per minute (L/min) and gallons per minute (GPM)."},{"title":"Common Flow Rate Conversions","content":"1 m³/s = 1000 L/s = 60,000 L/min = 264.17 gal/min (US) = 35.315 ft³/s. 1 L/min = 0.2642 gal/min. 1 CFM (ft³/min) = 28.317 L/min."},{"title":"Industrial Applications","content":"Oil production is measured in barrels per day (bbl/d). Large industrial pumps deliver thousands of L/min. Water treatment plants process millions of liters per day. HVAC systems are rated in CFM (cubic feet per minute) for air flow."},{"title":"Fluid Dynamics","content":"Flow rate Q = velocity × cross-sectional area. Increasing pipe diameter decreases velocity for the same flow rate. The continuity equation states that Q₁A₁ = Q₂A₂ for incompressible flow."}]}},"acceleration":{"units":{"meter-per-second-squared":"Meter per Second Squared (m/s²)","kilometer-per-second-squared":"Kilometer per Second Squared (km/s²)","foot-per-second-squared":"Foot per Second Squared (ft/s²)","inch-per-second-squared":"Inch per Second Squared (in/s²)","standard-gravity":"Standard Gravity (g)","galileo":"Galileo (Gal)","milligal":"Milligal (mGal)","centimeter-per-second-squared":"Centimeter per Second Squared (cm/s²)"},"knowledge":{"title":"Acceleration Unit Knowledge","items":[{"title":"Acceleration Basics","content":"Acceleration is the rate of change of velocity over time. The SI unit is meters per second squared (m/s²). Standard gravity (g) = 9.80665 m/s² is the acceleration due to gravity at Earth's surface."},{"title":"Common Acceleration Conversions","content":"1 g = 9.80665 m/s² = 32.174 ft/s². 1 Gal = 0.01 m/s² = 1 cm/s² (used in geophysics). 1 ft/s² = 0.3048 m/s². Fighter pilots can withstand 9g momentarily; sustained high-g causes blackout."},{"title":"Standard Gravity (g)","content":"Standard gravity (g₀ = 9.80665 m/s²) is defined by the ISO. It represents the mean gravitational acceleration at Earth's surface. Actual gravity varies from 9.764 m/s² at the equator to 9.834 m/s² at the poles."},{"title":"Galileo (Gal) in Geophysics","content":"The Galileo (Gal) is a unit used in gravimetry and seismology: 1 Gal = 0.01 m/s² = 1 cm/s². The milligal (mGal) = 10⁻⁵ m/s² is commonly used for gravity surveys, as typical variations across Earth's surface are measured in milligals."},{"title":"Acceleration in Technology","content":"Rocket acceleration: Saturn V achieved peak 40 m/s² (~4g). Car 0–100 km/h in 4s ≈ 7 m/s² (~0.7g). Smartphones contain accelerometers measuring ±2g to ±16g. High-speed centrifuges can exceed 100,000g."}]}}},"cosCalculator":{"title":"Cos Calculator","angle":"Angle (θ)","unit":"Unit","degrees":"Degrees","radians":"Radians","calculate":"Calculate","clear":"Clear","result":"Result (cos θ)","invalidInput":"Invalid input","guide":{"title":"How to Use","items":["Select the angle unit: Degrees or Radians.","Enter the angle value.","Click 'Calculate' to get the cosine value.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Cosine (cos)","introduction":"In trigonometry, the cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse in a right-angled triangle.","items":[{"title":"Formula","content":"cos(θ) = Adjacent / Hypotenuse"},{"title":"Properties","content":"The cosine function is periodic with a period of 2π (360°). Its value oscillates between -1 and 1. It is a shifted version of the sine function."}],"featuresTitle":"Common Values","features":["cos(0°) = 1","cos(30°) ≈ 0.8660","cos(45°) ≈ 0.7071","cos(60°) = 0.5","cos(90°) = 0"],"applicationsTitle":"Applications","applications":["Calculating horizontal components of vectors","Waveform analysis and signal processing","Structural engineering and architecture"]}},"countdownTimer":{"title":"Countdown Timer","description":"Create a precision countdown timer for events and deadlines.","eventName":"Event Name (Optional)","eventNamePlaceholder":"My Vacation","targetDate":"Target Date & Time","start":"Start Countdown","stop":"Stop","reset":"Reset","days":"Days","hours":"Hours","minutes":"Minutes","seconds":"Seconds","timeRemaining":"Time Remaining","eventReached":"Target Time Reached!","invalidDate":"Please select a future date and time.","presets":"Presets","presetNewYear":"Next New Year","presetChristmas":"Next Christmas","guide":{"title":"How to Use","items":["Optionally enter an event name to label your countdown.","Click the date/time picker and select your target date and time.","Press 'Start Countdown' to begin the live countdown.","The progress bar shows how much time has elapsed since the countdown started.","Use preset buttons for quick countdowns like New Year or Christmas."]},"knowledge":{"title":"About Countdown Timers","sections":[{"title":"Precision Timing","content":"This countdown updates every second using JavaScript's setInterval, providing reliable tracking for events days, hours, or minutes away."},{"title":"Time Zones","content":"The countdown uses your local device time. For cross-timezone events, account for the difference between your local time and the event's time zone."},{"title":"Common Use Cases","content":"Countdowns are used for product launches, event planning, holiday celebrations, project deadlines, and personal goal milestones."}]}},"crc":{"title":"CRC (Cyclic Redundancy Check) Calculator","inputFormat":"Input Format","clear":"Clear","backToAll":"Back to All Algorithms","otherAlgorithms":"Other CRC Algorithms","inputPlaceholder":{"hex":"Enter hexadecimal numbers (e.g.,48 65 6C 6C 6F)...","ascii":"Enter ASCII text to calculate CRC..."},"results":{"title":"CRC Results","description":"Click the star icon to pin your favorite algorithms at the top of the list.","filterLabel":"Filter Algorithms: ","filterPlaceholder":"Please enter algorithm name","msbLeft":"MSB Left (Big Endian)","msbRight":"MSB Right (Little Endian)"},"algorithms":{"CRC-4/ITU":"ITU G.704 standard for telecom frame synchronization","CRC-5/EPC":"Used in EPC Gen 2 RFID protocol","CRC-5/ITU":"ITU G.704 standard for frame synchronization","CRC-5/USB":"Used in USB token packets","CRC-6/ITU":"ITU G.704 standard for telecommunications","CRC-7/MMC":"Used for MMC command packet protection","CRC8/SMBUS":"Used in SMBus communication protocol","CRC8/AUTOSAR":"Used in automotive communication systems","CRC8/BLUETOOTH":"Used in Bluetooth protocol","CRC8/CDMA2000":"Used in CDMA2000 mobile communications","CRC8/DARC":"Used in data broadcasting systems","CRC8/DVB-S2":"Used in digital satellite TV transmission","CRC8/GSM-A":"Used in GSM-A mobile communications","CRC8/GSM-B":"Used in GSM-B mobile communications","CRC8/HITAG":"Used in HITAG RFID systems for data integrity","CRC8/ITU":"ITU standard for ATM HEC calculation","CRC8/MAXIM-DOW":"Used in Maxim/Dallas 1-Wire devices","CRC8/NRSC-5":"Used in digital broadcasting systems","CRC8/OPENSAFETY":"Used in industrial safety communications","CRC8/ROHC":"Used in Robust Header Compression protocol","CRC8/I-432-1":"Used in ITU-T I.432.1 standard","CRC8/I-CODE":"Used in Philips I-CODE RFID systems","CRC8/LTE":"Used in 4G LTE mobile communications","CRC8/MIFARE-MAD":"Used in MIFARE Application Directory","CRC8/SAE-J1850":"Used in automotive network communications","CRC8/TECH-3250":"Used in digital audio interfaces","CRC8/WCDMA":"Used in 3G WCDMA mobile communications","CRC16/CCITT-FALSE":"Used in SDLC, X.25 protocols","CRC16/CDMA2000":"Used in CDMA2000 mobile systems","CRC16/DDS-110":"Used in data acquisition systems","CRC16/DECT-R":"Used in DECT wireless communications","CRC16/DECT-X":"Used in DECT radio communications","CRC16/DNP":"Used in power system automation","CRC16/EN-13757":"Used in smart meter communications","CRC16/GENIBUS":"Used in industrial fieldbus","CRC16/KERMIT":"Used in Kermit file transfer protocol","CRC16/MAXIM-DOW":"Used in Maxim/Dallas device communications","CRC16/MODBUS":"Used in Modbus industrial protocol","CRC16/USB":"Used in USB data transfer verification","CRC16/X25":"Used in X.25 network protocol","CRC16/XMODEM":"Used in XMODEM file transfer protocol","CRC16/ARC":"Used in ARC and LHA compression formats","CRC16/CMS":"Used in Cryptographic Message Syntax protocol","CRC16/GSM":"Used in GSM mobile communications","CRC16/IBM-3740":"Used in IBM 3740 systems and AUTOSAR standard","CRC16/IBM-SDLC":"Used in IBM Synchronous Data Link Control protocol","CRC16/ISO-IEC-14443-3-A":"Used in RFID and NFC Type A protocols","CRC16/LJ1200":"Used in LoJack vehicle tracking system","CRC16/M17":"Used in M17 digital voice protocol","CRC16/MCRF4XX":"Used in Microchip RFID products","CRC16/OPENSAFETY-A":"Used in industrial safety communications channel A","CRC16/OPENSAFETY-B":"Used in industrial safety communications channel B","CRC16/PROFIBUS":"Used in PROFIBUS industrial fieldbus","CRC16/RIELLO":"Used in Riello UPS communication protocol","CRC16/SPI-FUJITSU":"Used in Fujitsu SPI communications","CRC16/T10-DIF":"Used in SCSI T10 Data Integrity Field","CRC16/TELEDISK":"Used in TeleDisk disk image format","CRC16/TMS37157":"Used in Texas Instruments TMS37157 devices","CRC16/UMTS":"Used in UMTS mobile communications","CRC32/AIXM":"CRC used in Aeronautical Information Exchange Model","CRC32/AUTOSAR":"CRC used in Automotive Open System Architecture","CRC32/BASE91-D":"CRC used in Base91 encoding","CRC32/BZIP2":"CRC used in BZIP2 compression format","CRC32/CD-ROM-EDC":"CRC used in CD-ROM Error Detection Code","CRC32/CKSUM":"CRC used in UNIX CKSUM command","CRC32/ISCSI":"CRC used in iSCSI storage protocol","CRC32/ISO-HDLC":"CRC used in ISO-HDLC communication protocol","CRC32/JAMCRC":"CRC used in JAM software","CRC32/MEF":"CRC used in Metro Ethernet Forum protocols","CRC32/MPEG-2":"CRC used in MPEG-2 transport stream","CRC32/XFER":"CRC used in XFER file transfer"},"knowledge":{"title":"CRC Knowledge","description":"Cyclic Redundancy Check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data. It is specifically designed to detect burst errors and is particularly effective in detecting common data transmission errors.","table":{"headers":["Name","Width","Polynomial","Init","XorOut","RefIn","RefOut","Usage"]},"features":{"title":"Features","items":["Excellent error detection for burst errors","Easy hardware implementation","Fast software calculation using lookup tables","Standardized parameters for different applications","Mathematically well-understood properties"]},"applications":{"title":"Applications","items":["Network protocols and data transmission","Storage devices and file systems","Digital communications","Industrial control systems","Error detection in embedded systems"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"csr-decoder":{"title":"CSR Decoder","input":{"title":"Input CSR","placeholder":"Paste -----BEGIN CERTIFICATE REQUEST-----...","decodeBtn":"Decode CSR"},"results":{"title":"CSR Details","subject":"Subject","publicKey":"Public Key Info","signature":"Signature Algorithm"}},"csr-generator":{"title":"CSR Generator","config":{"title":"Subject Information (DN)","cn":"Common Name (CN)","o":"Organization (O)","ou":"Organizational Unit (OU)","l":"City / Locality (L)","st":"State / Province (ST)","c":"Country Code (C)","keySize":"RSA Key Size","generateBtn":"Generate CSR"},"results":{"csr":"Certificate Signing Request (CSR)","privateKey":"Corresponding Private Key"}},"css-colors":{"title":"CSS Standard Color Reference","description":"Search and explore 140+ standard CSS named colors","search":"Search color name or hex code...","copySuccess":"Copied: {color}","total":"{count} colors found","groups":{"all":"All","red":"Reds","pink":"Pinks","orange":"Oranges","yellow":"Yellows","purple":"Purples","green":"Greens","blue":"Blues","brown":"Browns","white":"Whites","gray":"Grays"},"guide":{"title":"How to Use","items":["Scroll through the list to browse all 140+ standard CSS named colors.","Use the search bar at the top to filter by name or color code.","Click on category tags to view colors belonging to a specific group.","Click the copy button on any card to copy its HEX or name."]},"knowledge":{"title":"About CSS Named Colors","items":[{"title":"Historical Context","content":"CSS color names were originally derived from the X11 color system. They are now defined in CSS Color Module Level 4."},{"title":"Compatibility","content":"These 140+ predefined names are fully supported by all modern browsers and are easy to use in projects."}]}},"cssFormatter":{"title":"CSS Formatter & Minifier","description":"Format and beautify CSS code, or minify it for production.","format":"Format CSS","minify":"Minify CSS","clear":"Clear","history":"History","copy":"Copy","copied":"Copied!","darkTheme":"Dark Theme","formatSuccess":"Formatted successfully","formatError":"Formatting failed","minifySuccess":"Minified successfully","minifyError":"Minification failed","guide":{"title":"How to use","items":["Paste your CSS code into the editor.","Click 'Format CSS' to beautify the stylesheets.","Click 'Minify CSS' to compress the code.","Use the copy button to get the result.","Check History for previous versions."]},"knowledge":{"title":"About CSS Formatting","introduction":"CSS (Cascading Style Sheets) formatting ensures consistent styling rules and readability. Minification optimizes CSS files for faster network transmission.","items":[{"title":"Why Format CSS?","content":"Readable CSS is crucial for maintenance. Consistent spacing and indentation make it easier to scan selectors and properties."},{"title":"CSS Minification Benefits","content":"Minified CSS files are smaller and download faster. This directly improves Time to First Byte (TTFB) and overall site performance."}],"featuresTitle":"Key Features","features":["Prettier-based CSS formatting","Supports modern CSS features","Efficient minification","Syntax highlighting","Local history support"],"applicationsTitle":"Common Applications","applications":["Organizing messy legacy CSS","Optimizing stylesheets for production","Checking CSS syntax","Quickly formatting snippets"]}},"csvXml":{"title":"CSV to XML Converter","description":"Convert CSV to XML and XML to CSV online.","csvLabel":"CSV Input","xmlLabel":"XML Output","hasHeader":"My CSV has a header row","toXml":"To XML","toCsv":"To CSV","clear":"Clear","sample":"Paste your code here...","invalidCsv":"Invalid CSV","error":"Conversion Error","features":{"title":"Features","items":["Bidirectional conversion between CSV and XML","Support for CSV headers","Automatic XML structure generation","Secure client-side processing"]},"knowledge":{"title":"About CSV & XML","items":[{"title":"What is CSV?","content":"CSV (Comma-Separated Values) is a simple file format used to store tabular data, such as a spreadsheet or database."},{"title":"What is XML?","content":"XML (Extensible Markup Language) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable."}]},"guide":{"title":"How to Use","items":["Paste your CSV data into the left editor.","Check 'My CSV has a header row' if applicable.","Click 'To XML' to convert it to XML format.","Or paste XML into the right editor and click 'To CSV'.","Use the Copy button to save your result."]}},"curlConverter":{"title":"cURL Converter","description":"Convert cURL commands to JavaScript (Fetch), Python (Requests), or JSON.","input":"cURL Command","output":"Generated Code","convert":"Convert","copy":"Copy","copied":"Copied to clipboard","invalidCurl":"Invalid cURL command or unable to parse."},"cylinderCalculator":{"title":"Cylinder Calculator","description":"Calculate volume, surface area, and lateral area of a cylinder.","keywords":"cylinder calculator, volume of cylinder, surface area of cylinder","category":"Math","radius":"Radius (r)","height":"Height (h)","calculate":"Calculate","result":"Results","volume":"Volume","surfaceArea":"Total Surface Area","lateralArea":"Lateral Surface Area","baseArea":"Base Area","clear":"Clear","guide":{"title":"How to Use","items":["Enter the radius and height of the cylinder.","Click 'Calculate'.","Volume and Surface Areas will be displayed."]},"knowledge":{"title":"About Cylinders","introduction":"A cylinder is a three-dimensional solid with two parallel circular bases connected by a curved surface.","items":[{"title":"Formulas","content":"Volume = π * r^2 * h\nLateral Area = 2 * π * r * h\nTotal Area = 2 * π * r * (r + h)"}],"featuresTitle":"Features","features":["Calculate volume and area","Detailed breakdown of areas"],"applicationsTitle":"Applications","applications":["Tank capacity","Piping","Packaging"]}},"dateDifference":{"title":"Date Difference Calculator","description":"Calculate the exact duration and number of days between two dates.","calculator":{"inputs":{"startDate":"Start Date","endDate":"End Date","includeLastDay":"Include end date in calculation (+1 day)","button":"Calculate Difference","currentTime":"Today"},"results":{"title":"Difference","totalDays":"Total Days","detailed":"Detailed Duration","weeks":"Weeks","months":"Months","years":"Years","businessDays":"Business Days (Mon-Fri)","weekends":"Weekend Days"},"error":{"invalidDate":"Please provide valid dates."}},"knowledge":{"title":"About Date Differences","sections":[{"title":"Inclusive vs Exclusive","content":"By default, date differences exclude the end date. For example, Monday to Tuesday is 1 day. If you are calculating the length of an event, you may want to include the end date."},{"title":"Business Days","content":"Business days typically exclude Saturdays and Sundays. Holidays are not automatically excluded unless explicitly provided."},{"title":"Timezones","content":"Date span calculations usually ignore timezones unless specfic times are provided, relying solely on calendar days."}]}},"dateFormatter":{"title":"Date Formatter","description":"Format dates into custom readable strings. Support for multiple locales and formats.","formatter":{"input":{"title":"Input Time","placeholder":"Enter timestamp or date string","currentTime":"Use Current Time"},"format":{"title":"Custom Format String","placeholder":"e.g., YYYY-MM-DD HH:mm:ss","presets":"Presets","preview":"Preview"},"results":{"title":"Formatted Result","copy":"Copy","copied":"Copied"},"error":{"invalidDate":"Invalid date or timestamp","empty":"Please enter a value"},"presetsList":{"iso":"ISO 8601 (YYYY-MM-DD)","us":"US Format (MM/DD/YYYY)","eu":"EU Format (DD/MM/YYYY)","time12":"12-hour Time (hh:mm:ss A)","time24":"24-hour Time (HH:mm:ss)","full":"Full Date & Time (YYYY-MM-DD HH:mm:ss)"}},"knowledge":{"title":"Format Tokens Guide","sections":[{"title":"Year, Month, and Day","content":"YYYY: 4-digit year (e.g., 2024)\\nYY: 2-digit year (e.g., 24)\\nMM: Month, 2-digit (01-12)\\nM: Month (1-12)\\nDD: Day of month, 2-digit (01-31)\\nD: Day of month (1-31)"},{"title":"Time","content":"HH: Hour, 24-hour, 2-digit (00-23)\\nH: Hour, 24-hour (0-23)\\nhh: Hour, 12-hour, 2-digit (01-12)\\nh: Hour, 12-hour (1-12)\\nmm: Minute, 2-digit (00-59)\\nss: Second, 2-digit (00-59)\\nA: AM/PM"},{"title":"Other","content":"Z: Offset from UTC (e.g., +08:00)\\ndddd: Day of week (e.g., Monday)\\nMMMM: Full month name (e.g., January)"}]}},"dateParser":{"title":"Date String Parser","description":"Parse various date and time string formats into standard timestamps and ISO 8601 strings.","parser":{"input":{"title":"Date String","placeholder":"Enter any date string (e.g., '14 May 2024', '2024/05/14')","button":"Parse Date"},"results":{"title":"Parse Results","timestamp":"Unix Timestamp","timestampMs":"Timestamp (ms)","utc":"UTC Time","local":"Local Time","iso8601":"ISO 8601","isValid":"Valid Date","format":"Interpreted format (Preview)"},"error":{"invalid":"Could not parse date string","empty":"Please enter a date string"},"examples":{"title":"Try these formats:","list":["2024-05-14 15:30:00","May 14, 2024","14 May 2024 10:00 AM","Wed, 14 May 2024 12:00:00 GMT"]}},"knowledge":{"title":"About Date Parsing","sections":[{"title":"What is Date Parsing?","content":"Date parsing is the process of extracting meaningful datetime information from a structured or natural language string. Different regions use different formats (like MM/DD/YYYY vs DD/MM/YYYY)."},{"title":"ISO 8601 Standard","content":"The universally accepted standard for dates is ISO 8601 (YYYY-MM-DD). Using ISO 8601 helps eliminate ambiguity between different regional date formats."},{"title":"Timezones","content":"When parsing strings without explicit timezone offsets, the local timezone is usually assumed."}]}},"dayOfYear":{"title":"Day of Year Calculator","description":"Calculate which day of the 365/366 days it is for any date.","calculator":{"inputs":{"date":"Select Date","currentTime":"Today"},"results":{"title":"Result","dayNumber":"Day of the Year","daysRemaining":"Days Remaining in Year","percentage":"Year Percentage Complete","isLeapYear":"Is Leap Year?"}},"knowledge":{"title":"About Day of Year","sections":[{"title":"What is the Day of Year?","content":"The day of the year (also known as ordinal date) is a number from 1 to 365 (or 366 in leap years) indicating the position of a specific day within a calendar year."},{"title":"Leap Years","content":"A standard year has 365 days. A leap year, which occurs every four years (with exceptions per century rules), has 366 days. February 29th is the extra day, affecting the ordinal position of all dates from March 1st onwards."},{"title":"Usage","content":"Ordinal dates are widely used in astronomy, agriculture (for planting seasons), military logistics, and programming (Julian days computations)."}]}},"degreeRadian":{"seoTitle":"Degrees to Radians Converter | TE Cyber","seoDescription":"Free online angle converter. Convert degrees to radians and radians to degrees with high precision instantly.","title":"Degrees / Radians Converter","description":"Convert angle measurements between degrees, radians, and gradians.","from":"Convert From","to":"Convert To","value":"Angle Value","degrees":"Degrees (°)","radians":"Radians (rad)","gradians":"Gradians (grad)","calculate":"Convert","clear":"Clear","result":"Conversion Result","invalidInput":"Please enter a valid numeric angle value.","guide":{"title":"How to Use","items":["Select the starting unit you want to convert from.","Select the target unit you want to convert to.","Enter the value of the angle.","Click 'Convert' to get the equivalent measurement."]},"knowledge":{"title":"About Angle Measurements","introduction":"Angles are typically measured in degrees or radians depending on the context of the mathematical problem or application.","items":[{"title":"Degrees","content":"A degree is a measurement of a plane angle in which one full rotation is 360 degrees. It's the most common unit for general geometry and navigation."},{"title":"Radians","content":"A radian is the standard unit of angular measure used in mathematics, particularly calculus. One full circle equals 2π radians. The radian measure is the ratio of arc length to radius."}],"featuresTitle":"Conversion Formulas","features":["Degrees to Radians: Rad = Deg × (π / 180)","Radians to Degrees: Deg = Rad × (180 / π)","Gradians: One full rotation is 400 gradians."],"applicationsTitle":"Applications","applications":["Trigonometry and Calculus functions inherently use radians.","Physics engineering typically uses degrees.","Software development and 3D graphics engines use radians."]}},"des":{"title":"DES Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"8 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - Electronic Codebook","cbc":"CBC - Cipher Block Chaining","cfb":"CFB - Cipher Feedback","ofb":"OFB - Output Feedback","ctr":"CTR - Counter","gcm":"GCM - Galois/Counter Mode"},"padding":{"title":"Padding Mode","pkcs7":"PKCS#7 Padding","iso97971":"ISO/IEC 9797-1 Padding","ansix923":"ANSI X.923 Padding","iso10126":"ISO 10126 Padding","zeropadding":"Zero Padding","nopadding":"No Padding"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter 16 bytes IV text","hex":"Enter 32 digits hex IV"},"generate":"Generate Random IV","error":"Invalid IV length","positionTitle":"IV Position","positionDesc":"Choose how IV is handled with ciphertext","position":{"manual":"Manual - Provide IV separately","header":"Header - Automatically prepend/extract IV at beginning","footer":"Footer - Automatically append/extract IV at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"DES Knowledge","sections":[]}},"designTools":{"colorConverter":{"title":"Color Converter","description":"Convert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly.","inputLabel":"Enter Color","inputPlaceholder":"e.g. #ff0000, rgb(255, 0, 0), blue","formats":{"hex":"HEX","rgb":"RGB","hsl":"HSL","hsv":"HSV","cmyk":"CMYK","name":"Name"},"copy":"Copy","copied":"Copied!","invalidColor":"Invalid color format","guide":{"title":"How to Use","items":["Enter a color value in any supported format (HEX, RGB, Name, etc.) in the input field.","The tool will automatically convert the color to all other formats.","Click the copy button next to any format to copy the value to your clipboard.","You can also use the color picker to select a color visually."]},"knowledge":{"title":"About Color Formats","items":[{"title":"HEX","content":"A hexadecimal color is specified with: #RRGGBB. RR (red), GG (green) and BB (blue) are hexadecimal integers between 00 and FF specifying the intensity of the color."},{"title":"RGB","content":"RGB color values are supported in all browsers. An RGB color value is specified with: rgb(red, green, blue)."},{"title":"HSL","content":"HSL stands for Hue, Saturation, and Lightness. HSL represents a cylindrical-coordinate representation of points in an RGB color model."},{"title":"CMYK","content":"CMYK stands for Cyan, Magenta, Yellow, and Key (Black). It is a subtractive color model, used in color printing."}]}},"boxShadowGenerator":{"title":"Box Shadow Generator","description":"Visual CSS Box Shadow generator with real-time preview.","settings":{"shiftRight":"Shift Right","shiftDown":"Shift Down","blur":"Blur","spread":"Spread","opacity":"Opacity","inset":"Inset","color":"Shadow Color"},"copy":"Copy CSS","copied":"Copied!","reset":"Reset","guide":{"title":"How to Use","items":["Adjust the sliders to change the horizontal and vertical offset, blur radius, and spread radius.","Toggle 'Inset' to create an inner shadow.","Change the shadow color and opacity using the controls.","Copy the generated CSS code to use in your project."]},"knowledge":{"title":"About Box Shadow","items":[{"title":"Shift Right (Offset X)","content":"Specifies the horizontal distance of the shadow. Positive values move the shadow to the right, negative values to the left."},{"title":"Shift Down (Offset Y)","content":"Specifies the vertical distance of the shadow. Positive values move the shadow down, negative values up."},{"title":"Blur Radius","content":"The larger the value, the bigger and lighter the shadow becomes. If set to 0, the shadow will be sharp."},{"title":"Spread Radius","content":"Positive values increase the size of the shadow, negative values decrease it."}]}},"borderRadiusGenerator":{"title":"Border Radius Generator","description":"Visual CSS Border Radius generator with individual corner control.","settings":{"allCorners":"All Corners","topLeft":"Top Left","topRight":"Top Right","bottomRight":"Bottom Right","bottomLeft":"Bottom Left","width":"Width","style":"Style","color":"Color"},"copy":"Copy CSS","copied":"Copied!","guide":{"title":"How to Use","items":["Use the 'All Corners' slider to adjust all corners simultaneously, or adjust each corner individually.","You can also customize the border width, style, and color.","The preview updates in real-time.","Copy the generated CSS code to use in your project."]},"knowledge":{"title":"About Border Radius","items":[{"title":"border-radius","content":"The border-radius property defines the radius of the element's corners."},{"title":"Individual Corners","content":"You can specify different values for each corner: top-left, top-right, bottom-right, and bottom-left."}]}},"cssCursor":{"title":"CSS Cursor","description":"Visualize and copy CSS cursor property values.","searchPlaceholder":"Search cursors...","copy":"Copy","copied":"Copied!","categories":{"general":"General","links":"Links & Status","selection":"Selection","drag":"Drag & Drop","resize":"Resizing","zoom":"Zooming"},"guide":{"title":"How to Use","items":["Hover over any box to see the cursor effect.","Click on a box to copy the CSS code.","Use the search bar to find specific cursors."]},"knowledge":{"title":"About CSS Cursor","items":[{"title":"cursor property","content":"The cursor CSS property specifies the mouse cursor to be displayed when pointing over an element."}]}},"gradientGenerator":{"title":"Gradient Generator","description":"Create beautiful CSS gradients visually.","settings":{"type":"Type","linear":"Linear","radial":"Radial","angle":"Angle","colors":"Colors","stops":"Stops"},"preview":"Preview","copy":"Copy CSS","copied":"Copied!","random":"Random","guide":{"title":"How to Use","items":["Select the gradient type (Linear or Radial).","Adjust the angle for linear gradients.","Add, remove, or modify color stops to create your desired gradient.","Copy the generated CSS code."]},"knowledge":{"title":"About CSS Gradients","items":[{"title":"Linear Gradient","content":"Transitions colors along a straight line. You can control the direction/angle of the transition."},{"title":"Radial Gradient","content":"Transitions colors from a center point outwards in a circular or elliptical shape."}]}}},"disclaimer":{"title":"Disclaimer","lastUpdated":"Last Updated: July 17, 2025","introduction":{"title":"Disclaimer Description","content":"This disclaimer applies to all online tools and services provided by Online Calculator Tools. Please read this disclaimer carefully before using our services. Using our services indicates that you have understood and agreed to all terms of this disclaimer.\n\nThis disclaimer aims to clarify service scope, usage risks, and liability boundaries, protecting the legitimate rights of both users and service providers. If you have any questions, please contact us for clarification before use."},"sections":[{"title":"1. Service Nature and Purpose","content":"Basic nature description of our services:","items":["The tools provided on this website are for learning, research, and development testing purposes only","Tool results are for reference only and do not constitute any form of technical guarantee or commitment","Users should verify the accuracy of tool outputs according to actual application scenarios","Direct use of tool results in critical production environments is not recommended","Tools are designed based on general online calculator standards and may not be suitable for all devices and scenarios","Users are responsible for ensuring tool usage complies with relevant technical specifications and safety requirements"]},{"title":"2. Technical Accuracy Limitations","content":"Description of tool technical accuracy:","items":["Tool calculation results may differ slightly from other tools due to algorithm implementation differences","Functions such as CRC verification and data conversion have been tested but are not guaranteed to be completely accurate in all situations","Different manufacturers' online calculator implementations may have subtle differences; tools cannot cover all variants","User input data format and range may affect tool processing results","Network transmission, browser compatibility, and other factors may affect normal tool operation","Sufficient verification and testing are recommended before formal use"]},{"title":"3. Usage Risks and Responsibilities","content":"Using our services may involve the following risks:","items":["Equipment damage risk: Improper online calculator commands may cause device failures or data loss","Production interruption risk: Testing in production environments may affect normal production processes","Data security risk: Although local processing is prioritized, we still recommend not inputting sensitive or confidential data","Compatibility risk: Tools may not be fully compatible with certain special devices or systems","Operational error risk: User operational errors may lead to unexpected results","Users should use tools cautiously with full understanding of risks"]},{"title":"4. Service Availability Statement","content":"Description of service availability:","items":["We strive to maintain service stability but do not guarantee uninterrupted service operation","System maintenance, network failures, and other factors may cause temporary service unavailability","Browser compatibility issues may affect normal tool use","Force majeure factors (such as natural disasters, government regulations, etc.) may affect service provision","We reserve the right to modify, suspend, or terminate services at any time","We are not responsible for any losses caused by service interruptions"]},{"title":"5. Third-Party Dependency Statement","content":"Our services may depend on third-party technologies:","items":["Stability of Web APIs, JavaScript libraries, and other third-party technologies may affect tool functionality","Browser vendor updates may affect tool compatibility","CDN services and network service provider issues may affect access speed","Third-party service privacy policies and terms of service may differ from ours","We are not responsible for the availability and reliability of third-party services","We recommend users understand and accept relevant third-party service terms"]},{"title":"6. Online Calculator Application Disclaimer","content":"Special disclaimer for online calculator applications:","items":["These tools are not professional online calculator software and should not be used for safety-critical systems","Sufficient safety assessment and testing must be conducted before use in online calculator environments","We bear no responsibility for equipment damage or production losses caused by tool use","Users should comply with relevant online calculator safety standards and operating procedures","We recommend consulting professional technical personnel or using certified professional tools","For mission-critical applications, please use verified commercial-grade solutions"]},{"title":"7. Data Processing Disclaimer","content":"Disclaimer regarding user data processing:","items":["Although tools prioritize local data processing, we do not guarantee data will absolutely not be transmitted to servers","Users are responsible for ensuring input data does not contain confidential or sensitive information","We bear no responsibility for reviewing or verifying any user input data content","Data loss, leakage, and other risks are borne by users themselves","We recommend regular backup of important data and not relying entirely on online tools","For enterprise users, we recommend establishing internal data security management systems"]},{"title":"8. Intellectual Property Disclaimer","content":"Disclaimer regarding intellectual property:","items":["Intellectual property ownership of content generated by users using tools is determined by users themselves","We are not responsible for potential third-party intellectual property infringement from user tool usage","Users should ensure their usage behavior complies with relevant laws and regulations","If intellectual property infringement complaints are received, we reserve the right to take necessary measures","Users should respect others' intellectual property and legally use relevant technologies and standards","We are not responsible for any losses arising from intellectual property disputes"]},{"title":"9. Legal Application and Dispute Resolution","content":"Description of legal application:","items":["This disclaimer applies to relevant local laws and regulations","If some clauses of this disclaimer are invalid for legal reasons, it does not affect the validity of other clauses","Disputes between users and us should first be resolved through friendly negotiation","Users using services indicates agreement to relevant dispute resolution mechanisms","We reserve the right to final interpretation of this disclaimer terms","When applicable laws change, this disclaimer will be adjusted accordingly"]},{"title":"10. Disclaimer Scope","content":"We do not bear the following types of losses and responsibilities:","items":["Direct or indirect economic losses, profit losses, opportunity losses","Consequential losses such as data loss, business interruption, reputation damage","Losses caused by third-party actions (such as network attacks, malware, etc.)","Losses caused by user violations of usage rules or improper operations","Losses caused by force majeure factors","Losses caused by technical issues beyond our reasonable control"]},{"title":"11. Recommendations and Best Practices","content":"To reduce usage risks, we recommend:","items":["Verify tool results in test environments before applying to production environments","Maintain regular backups of important data and configuration information","Use the latest browser versions for optimal compatibility","Follow online calculator safety standards and best practices","Use multiple tools for cross-verification in critical applications","Establish appropriate error handling and recovery mechanisms"]},{"title":"12. Disclaimer Updates","content":"Regarding updates to this disclaimer:","items":["We reserve the right to modify this disclaimer at any time","Important modifications will be notified to users through website announcements and other means","Updated disclaimers will be published on the website and take effect immediately","Continued use of services is deemed as agreement to modified disclaimers","We recommend users regularly check the latest version of this disclaimer","If you do not agree to modified disclaimers, please stop using our services"],"contact":{"email":"support@calctools.online","subject":"Disclaimer Inquiry","purpose":"Disclaimer-related issues, legal consultation, risk assessment, etc.","responseTime":"We will reply within 3 business days after receiving inquiries","legalAdvice":"Our responses are for reference only and do not constitute professional legal advice"}}]},"distanceCalculator":{"seoTitle":"Distance Calculator | 2D and 3D Points - TE Cyber","seoDescription":"Free online distance calculator. Find the straight-line (Euclidean) distance between two points in 2D or 3D space.","title":"Distance Calculator","description":"Calculate the distance between two points in 2D or 3D coordinate geometry.","dimension":"Dimension","2d":"2D Space (x, y)","3d":"3D Space (x, y, z)","point1":"Point 1","point2":"Point 2","calculate":"Calculate Distance","clear":"Clear","result":"Distance","invalidInput":"Please enter valid numeric coordinates.","guide":{"title":"How to Use","items":["Select the dimension (2D or 3D) you are working within.","Enter the coordinates for Point 1 and Point 2.","Click 'Calculate Distance' to get the exact distance between them."]},"knowledge":{"title":"About Euclidean Distance","introduction":"The Euclidean distance is the length of a line segment between two points in Euclidean space. It is the straight-line distance.","items":[{"title":"2D Distance Formula","content":"The distance d between two points (x₁, y₁) and (x₂, y₂) is defined as: d = √[(x₂ - x₁)² + (y₂ - y₁)²]."},{"title":"3D Distance Formula","content":"The distance d between two points (x₁, y₁, z₁) and (x₂, y₂, z₂) is defined as: d = √[(x₂ - x₁)² + (y₂ - y₁)² + (z₂ - z₁)²]."}],"featuresTitle":"Properties","features":["Distance is always non-negative (d ≥ 0).","Distance from a point to itself is zero (d = 0).","Distance is symmetric: distance from A to B is the same as B to A.","Satisfies the triangle inequality theorem."],"applicationsTitle":"Applications","applications":["Computer Graphics and Physics simulations.","Mapping, routing, and GPS positioning.","Machine learning algorithms like K-Nearest Neighbors (KNN)."]}},"dnsLookup":{"title":"DNS Lookup","description":"Check DNS records for any domain name.","input":"Domain Name","inputPlaceholder":"Enter a domain (e.g., google.com)","lookup":"Lookup","loading":"Looking up...","error":"Failed to lookup DNS records. Please check the domain and try again.","allRecords":"All Records","results":{"title":"DNS Records","type":"Type","ttl":"TTL","value":"Value","priority":"Priority"},"guide":{"title":"How to use DNS Lookup","items":["Enter a domain name (e.g., google.com) in the input field.","Click the 'Lookup' button.","The tool will query and display various DNS records including A, AAAA, MX, NS, TXT, and SOA."]},"knowledge":{"title":"About DNS Records","items":[{"title":"A Record","content":"Maps a domain name to an IPv4 address."},{"title":"AAAA Record","content":"Maps a domain name to an IPv6 address."},{"title":"MX Record","content":"Specifies the mail servers responsible for accepting email messages on behalf of a domain."},{"title":"NS Record","content":"Delegates a DNS zone to use the given authoritative name servers."},{"title":"TXT Record","content":"Stores text information for sources outside of your domain (e.g., SPF, DKIM)."},{"title":"SOA Record","content":"Start of Authority. Contains administrative information about the zone."}],"featuresTitle":"Features","features":["Query all common DNS record types","Fast server-side lookup","Display TTL and Priority information"],"applicationsTitle":"Applications","applications":["Verifying DNS propagation","Troubleshooting email delivery issues","Checking domain configuration","Security analysis"]}},"domainAge":{"title":"Domain Age Checker","description":"Check the age of a domain name and its registration creation date.","inputLabel":"Domain Name","inputPlaceholder":"example.com","buttonLabel":"Check Age","creationDate":"Creation Date","expirationDate":"Expiration Date","domainAge":"Domain Age","registrar":"Registrar","years":"years","months":"months","days":"days","errorLabel":"Error"},"dominant-colors":{"title":"Dominant Colors Extractor","description":"Automatically analyze an image and extract its core color scheme (palette).","upload":"Analyze Image","palette":"Extraction Results","count":"Color Count","extract":"Start Extraction","guide":{"title":"Usage Guide","items":["Upload the image you want to analyze.","The system uses Median Cut or clustering algorithms to analyze the image.","It displays the most representative colors and their percentages.","Click on any color box to quickly copy the code."]},"knowledge":{"title":"Color Extraction Tech","items":[{"title":"Median Cut Algorithm","content":"A popular color quantization algorithm that finds representative colors by repeatedly splitting boxes in the color space."}]}},"easterCalculator":{"title":"Easter Calculator","description":"Calculate the exact date of Easter Sunday for any given year.","yearLabel":"Enter Year","yearPlaceholder":"e.g., 2024","calculate":"Calculate Easter Date","result":"Easter Sunday Date","gregorian":"Gregorian Calendar (Western)","julian":"Julian Calendar (Orthodox)","method":"Calculation Method","daysUntil":"Days until Easter","daysPast":"Days since Easter","invalidYear":"Please enter a valid year (e.g., 1583 or later).","infoTitle":"About Easter Calculation","infoText":"Easter is a movable feast, determined by the lunar calendar. In western Christianity, it falls on the first Sunday after the first full moon occurring on or after the vernal equinox.","guide":{"title":"How to Use","items":["Enter a year in the input field (e.g. 2024). Years from 1583 onwards use the Gregorian algorithm.","Click 'Calculate Easter Date' to find the exact date of Easter Sunday for that year.","Both Gregorian (Western Christian) and Julian (Orthodox) Easter dates are displayed.","The result shows the date, the number of days until Easter (or days past if already occurred).","Use the year arrows or simply type different years to compare Easter dates across years."]},"knowledge":{"title":"About Easter Calculation","sections":[{"title":"The Computus Algorithm","content":"Easter is calculated using an algorithm called the 'Computus' (Latin for 'computation'). The Western (Gregorian) algorithm was codified by the Catholic Church and computes the first Sunday after the first full moon on or after the vernal equinox (March 21). The anonymous Gregorian algorithm works from 1583 to 4099."},{"title":"Western vs Orthodox Easter","content":"Western Christianity (Catholic and most Protestant churches) uses the Gregorian calendar, so Easter falls between March 22 and April 25. Orthodox Christianity uses the Julian calendar, so Orthodox Easter can fall between April 4 and May 8 (Gregorian). The two dates coincide in some years but can be up to 5 weeks apart."},{"title":"Easter's Impact on the Calendar","content":"Easter is a 'moveable feast' that determines the dates of many other Christian holidays: Ash Wednesday (46 days before), Palm Sunday (7 days before), Good Friday (2 days before), Ascension Thursday (39 days after), and Pentecost (49 days after). It affects school calendars, public holidays, and even financial quarter timing in several countries."}]}},"ecc":{"title":"ECC Encryption/Decryption","keyPair":{"title":"Key Pair Management","generate":"Generate Key Pair","curve":"Elliptic Curve","format":"Key Format","publicKey":"Public Key","privateKey":"Private Key","error":"Error generating key pair","publicKeyPlaceholder":"Paste public key here...","privateKeyPlaceholder":"Paste private key here...","curves":{"secp256k1":"secp256k1","prime256v1":"prime256v1 (P-256)","secp384r1":"secp384r1 (P-384)"},"formats":{"hex":"HEX","pem":"PEM"},"clearKey":"Clear Keys"},"crypto":{"title":"ECC Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter text to encrypt...","hex":"Enter hexadecimal data...","base64":"Enter Base64 data..."},"cipherPlaceholder":{"hex":"Encrypted result...","base64":"Encrypted result..."},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"process":"Operation failed: Please check your input and keys","noInput":"Please enter data","noKey":"Please enter private/public key"}},"knowledge":{"title":"ECC Algorithm Information","sections":[{"title":"What is ECC?","content":"Elliptic-curve cryptography (ECC) is an approach to public-key cryptography based on the algebraic structure of elliptic curves over finite fields."}]}},"ecdsa":{"title":"ECDSA Signature/Verification Tool","config":{"title":"Key & Algorithm Configuration","generate":"Generate Key Pair","curve":"Elliptic Curve","hashAlg":"Hash Algorithm","publicKey":"Public Key","privateKey":"Private Key","publicKeyPlaceholder":"Paste public key (Hex)...","privateKeyPlaceholder":"Paste private key (Hex)...","curves":{"secp256r1":"secp256r1","secp256k1":"secp256k1","secp384r1":"secp384r1"}},"signature":{"title":"Sign / Verify","message":"Message Content","messagePlaceholder":"Enter message to sign or verify...","signature":"Signature","signaturePlaceholder":"Enter digital signature (Hex) to verify, or click Sign to generate...","signBtn":"Sign Message","verifyBtn":"Verify Signature","validity":"Signature is Valid!","invalid":"Signature is Invalid!","error":{"noKey":"Missing required key","noMessage":"Message is required","noSignature":"Signature is required for verification","process":"Failed to process signature"}},"knowledge":{"title":"ECDSA Knowledge","sections":[{"title":"What is ECDSA?","content":"The Elliptic Curve Digital Signature Algorithm (ECDSA) offers a variant of the Digital Signature Algorithm (DSA) which uses elliptic curve cryptography."}]}},"ed25519":{"title":"Ed25519 Signature/Verification Tool","config":{"title":"Key Configuration","generate":"Generate Key Pair","publicKey":"Public Key (Hex)","privateKey":"Private Key (Hex)","publicKeyPlaceholder":"Paste public key (Hex)...","privateKeyPlaceholder":"Paste private key (Hex)..."},"signature":{"title":"Sign / Verify","message":"Message Content","messagePlaceholder":"Enter message to sign or verify...","signature":"Signature (Hex)","signaturePlaceholder":"Enter digital signature (Hex) to verify, or click Sign to generate...","signBtn":"Sign Message","verifyBtn":"Verify Signature","validity":"Signature is Valid!","invalid":"Signature is Invalid!","error":{"noKey":"Missing required key","noMessage":"Message is required","noSignature":"Signature is required for verification","process":"Failed to process signature"}},"knowledge":{"title":"Ed25519 Knowledge","sections":[{"title":"What is Ed25519?","content":"Ed25519 is an EdDSA signature scheme using SHA-512 and Curve25519. It offers high speed and security."}]}},"electrical-batteryLife":{"title":"Battery Life Calculator","description":"Calculate estimated battery runtime from capacity (mAh), load current (mA) or power consumption (mW), and supply voltage.","ui":{"capacity":"Battery Capacity (mAh)","inputMode":"Input Mode","modeCurrent":"Load Current (mA)","modePower":"Power Consumption (mW)","current":"Load Current (mA)","power":"Power Consumption (mW)","voltage":"Battery Voltage (V)","efficiency":"Efficiency Factor (%)","calculate":"Calculate","result":"Results","runtime":"Estimated Runtime","runtimeHours":"In Hours","runtimeDays":"In Days","averageCurrent":"Average Current","capacityUsed":"Usable Capacity","hoursUnit":"hours","daysUnit":"days","capacityPlaceholder":"e.g. 2000","currentPlaceholder":"e.g. 50","powerPlaceholder":"e.g. 500","voltagePlaceholder":"e.g. 3.7"},"guide":{"title":"How to Use","items":["Enter the battery capacity in mAh (milliamp-hours) — found on the battery label.","Select input mode: 'Load Current' (mA) if you know the current, or 'Power' (mW) if you know the wattage.","For power mode, also enter the battery voltage to convert mW to mA automatically.","Enter the efficiency factor (0–100%). 70–85% is typical for batteries with incomplete discharge.","Click 'Calculate' to get the estimated runtime in hours and days.","Runtime = (Capacity × Efficiency) / Current. Divide capacity by 1000 for amp-hours."]},"knowledge":{"title":"About Battery Life","items":[{"title":"Battery Capacity and mAh","content":"Battery capacity is rated in mAh (milliamp-hours) or Ah (amp-hours). A 2000mAh battery can theoretically supply 2000mA for 1 hour, or 200mA for 10 hours, or 20mA for 100 hours. The theoretical runtime = Capacity (mAh) / Current (mA). In practice, real runtime is 70–85% of theoretical due to internal resistance losses, voltage cutoff, and temperature effects."},{"title":"Peukert Effect","content":"Higher discharge rates reduce the effective capacity of a battery — this is the Peukert effect. A 2000mAh battery discharged at 2A (1C rate) may deliver less than 2000mAh of usable charge compared to discharging at 200mA (0.1C rate). This effect is most pronounced in lead-acid batteries and less significant in lithium-ion batteries. The efficiency factor in this calculator roughly accounts for this effect."},{"title":"Real-world Battery Efficiency","content":"Several factors reduce actual battery life below the theoretical value: internal resistance (causes voltage sag), temperature (cold weather reduces capacity by up to 30–50%), depth of discharge limits (most rechargeable batteries should not discharge below ~2.8–3V for lithium-ion to preserve longevity), self-discharge, and power management overhead in the device. A derating factor of 70–80% gives realistic estimates for most applications."},{"title":"Battery Life for IoT and Embedded Systems","content":"For IoT devices with sleep modes, calculate the average current: I_avg = (I_active × t_active + I_sleep × t_sleep) / (t_active + t_sleep). For example, a device active for 10ms at 20mA then sleeping for 990ms at 10µA: I_avg = (20mA×0.01 + 0.01mA×0.99) / 1 = 0.21mA. This average current, combined with the battery capacity, gives the expected runtime before recharging."}],"featuresTitle":"Key Features","features":["Calculates runtime from mAh capacity and load current or power","Efficiency factor input for realistic estimates","Converts power (mW) to current (mA) using supply voltage","Results in hours and days for easy planning"],"applicationsTitle":"Common Applications","applications":["IoT sensor node battery life estimation","Portable electronics product design","Remote control and wireless device planning","Emergency backup system sizing","EV and e-bike range estimation"]}},"electrical-capacitorCode":{"title":"Capacitor Code Calculator","description":"Decode ceramic capacitor 3-digit codes (e.g. 104) to actual capacitance values in pF, nF, or µF. Also encode a capacitance value to find the code.","ui":{"decode":"Decode (Code → Value)","encode":"Encode (Value → Code)","capacitorCode":"Capacitor Code (3 digits)","capacitorValue":"Capacitance Value","unit":"Unit","pF":"pF (picofarads)","nF":"nF (nanofarads)","uF":"µF (microfarads)","calculate":"Calculate","result":"Result","valueInPF":"Value in pF","valueInNF":"Value in nF","valueInUF":"Value in µF","codeResult":"Capacitor Code","codePlaceholder":"e.g. 104","valuePlaceholder":"e.g. 100"},"guide":{"title":"How to Use","items":["To decode: enter the 3-digit code printed on the capacitor (e.g. '104') and click Calculate.","To encode: enter the capacitance value and select the unit (pF, nF, or µF), then click Calculate.","The code format is: first two digits are significant figures, third digit is the power of 10 multiplier.","For example, '104' means 10 × 10⁴ pF = 100,000 pF = 100 nF = 0.1 µF.","Special codes: '0' to '9' without a third digit indicate the value directly in pF.","Tolerance and voltage rating are often printed separately as letters (e.g. 'K' = ±10%, 'Z' = +80/-20%)."]},"knowledge":{"title":"About Capacitor Codes","items":[{"title":"The 3-Digit Code System","content":"Small ceramic and film capacitors use a 3-digit marking system similar to resistor color codes. The first two digits are the capacitance value's significant figures, and the third digit is the multiplier (exponent of 10). The base unit is picofarads (pF). So '104' = 10 × 10⁴ pF = 100,000 pF = 0.1µF. This system allows large values to be printed in a very small space."},{"title":"Special Code Values","content":"Codes '8' and '9' as the third digit have special meanings: '8' means multiply by 0.01, and '9' means multiply by 0.1. So '108' = 10 × 0.01 = 0.1 pF and '109' = 10 × 0.1 = 1 pF. For values below 10pF, the code may be printed directly (e.g., '4R7' means 4.7pF where 'R' represents the decimal point)."},{"title":"Tolerance and Voltage Codes","content":"Additional letters after the 3-digit code indicate tolerance and voltage rating. Common tolerance codes: B=±0.1pF, C=±0.25pF, D=±0.5pF, F=±1%, G=±2%, J=±5%, K=±10%, M=±20%, Z=+80/-20%. Voltage codes vary by manufacturer. Always check the full datasheet when selecting capacitors for precision or high-voltage applications."},{"title":"Common Capacitor Values and Their Codes","content":"Frequently encountered codes: 101=100pF, 102=1nF, 103=10nF, 104=100nF(0.1µF), 105=1µF, 221=220pF, 472=4.7nF, 473=47nF, 474=470nF. These values correspond to standard E12/E24 series capacitances. The 100nF (0.1µF) bypass capacitor, coded '104', is one of the most common components in electronics, used for power supply decoupling."}],"featuresTitle":"Key Features","features":["Decode 3-digit capacitor codes to pF, nF, and µF simultaneously","Encode any capacitance value back to the standard code","Handles special multiplier codes (×0.01 and ×0.1)","Supports input in pF, nF, or µF units"],"applicationsTitle":"Common Applications","applications":["Identifying unmarked or unknown capacitors from component bins","PCB component selection and procurement","Circuit repair and component replacement","Electronics education and lab work","Verifying capacitor values without measurement equipment"]}},"electrical-dbmWatt":{"title":"dBm to Watt Converter","description":"Convert between dBm and Watts (mW, µW, dBW) with a single click. Includes a common RF power reference table.","ui":{"dbmToWatt":"dBm → Watt","wattToDbm":"Watt → dBm","dbm":"Power (dBm)","watt":"Power (W)","milliwatt":"Power (mW)","microwatt":"Power (µW)","dbw":"Power (dBW)","calculate":"Convert","result":"Results","dbmValue":"dBm","dbwValue":"dBW","wattValue":"Watts","mwValue":"Milliwatts","uwValue":"Microwatts","referenceTable":"Common RF Power Reference Values","device":"Device / Standard","typicalPower":"Typical Power","dbmPlaceholder":"e.g. 0","wattPlaceholder":"e.g. 0.001"},"guide":{"title":"How to Use","items":["To convert from dBm to Watts: enter a dBm value and click 'Convert'.","To convert from Watts to dBm: switch to 'Watt → dBm' mode, enter the power in watts (or mW), and click 'Convert'.","Results show the equivalent value in dBm, dBW, W, mW, and µW simultaneously.","Formula: P(W) = 10^(dBm/10) / 1000; P(dBm) = 10 × log10(P(mW)).","Consult the reference table for typical power levels of common RF devices.","dBm = 0 means 1 milliwatt of power."]},"knowledge":{"title":"About dBm and RF Power","items":[{"title":"What is dBm?","content":"dBm (decibels relative to one milliwatt) is a logarithmic unit of power used extensively in RF engineering, telecommunications, and audio. The formula is: P(dBm) = 10 × log₁₀(P(mW)). Key values: 0 dBm = 1 mW, +10 dBm = 10 mW, +20 dBm = 100 mW, +30 dBm = 1 W, −10 dBm = 0.1 mW, −30 dBm = 1 µW. The logarithmic scale makes it easy to handle the enormous power range from picoWatts to kiloWatts."},{"title":"dBm vs dBW","content":"dBm is referenced to 1 milliwatt; dBW is referenced to 1 watt. The relationship is: dBW = dBm − 30. So 30 dBm = 0 dBW = 1 watt. dBW is more common in satellite and high-power applications; dBm is used for everything from received signal strengths (−100 dBm for weak cellular signals) to transmitter outputs (+43 dBm for 20W base stations). Both use logarithmic math, so power levels add (in dB) rather than multiply."},{"title":"Typical RF Power Levels","content":"Common RF power reference levels: Bluetooth (BT 4.0 Class 2) = +4 dBm (2.5 mW), WiFi 802.11n (max) = +20 dBm (100 mW), LTE/4G mobile phone max = +23 dBm (200 mW), 2.4GHz WiFi AP typical = +15 to +20 dBm, microwave oven leakage limit = −22 dBm/cm², FM broadcast transmitter = +67 to +80 dBm (5–10 kW), GPS received signal = −130 dBm. Receiving systems must handle from −120 dBm (noise floor) to +30 dBm (strong signal)."},{"title":"Link Budget Calculations","content":"In RF system design, link budget = Transmit Power (dBm) + Transmit Gain (dBi) − Free Space Path Loss (dB) + Receive Gain (dBi) − Receive System Noise (dB) ≥ Required SNR (dB). Using dBm throughout makes link budget calculation a simple addition and subtraction problem. For example: 23 dBm Tx + 5 dBi antenna − 80 dB path loss + 3 dBi receive antenna = −49 dBm received. This received power must exceed the receiver sensitivity (e.g. −100 dBm for 4G)."}],"featuresTitle":"Key Features","features":["Bidirectional conversion: dBm ↔ W with full unit display","Shows dBm, dBW, W, mW, and µW simultaneously","Reference table of common RF power levels","Handles power range from µW (−90 dBm) to kW (+90 dBm)"],"applicationsTitle":"Common Applications","applications":["RF link budget calculation for wireless systems","Antenna and transmitter power analysis","WiFi, Bluetooth, and cellular signal strength interpretation","Radar and satellite communication system design","Audio engineering signal level conversion"]}},"electrical-electricityCost":{"title":"Electricity Cost Calculator","description":"Calculate electricity bills from device power, usage hours, and electricity rate. Supports flat-rate and tiered pricing.","ui":{"power":"Device Power (W)","hoursPerDay":"Hours Used per Day","rate":"Electricity Rate (per kWh)","pricingMode":"Pricing Mode","flatRate":"Flat Rate","tieredRate":"Tiered Rate","tier1Limit":"Tier 1 Limit (kWh/month)","tier1Rate":"Tier 1 Rate","tier2Limit":"Tier 2 Limit (kWh/month)","tier2Rate":"Tier 2 Rate","tier3Rate":"Tier 3 Rate (above Tier 2)","currency":"Currency Symbol","calculate":"Calculate","result":"Cost Breakdown","dailyCost":"Daily Cost","monthlyCost":"Monthly Cost","yearlyCost":"Yearly Cost","monthlyKwh":"Monthly Consumption","yearlyKwh":"Yearly Consumption","kwhUnit":"kWh","powerPlaceholder":"e.g. 1000","hoursPlaceholder":"e.g. 8","ratePlaceholder":"e.g. 0.12"},"guide":{"title":"How to Use","items":["Enter the device power in watts and daily usage hours.","Select 'Flat Rate' for a single electricity price per kWh.","Select 'Tiered Rate' for tiered pricing, enter the kWh thresholds and price per tier.","Enter the currency symbol (e.g. $, €, ¥, £) for local formatting.","Click 'Calculate' to see daily, monthly, and yearly cost estimates.","For tiered billing, the calculator applies the correct rate to each consumption bracket."]},"knowledge":{"title":"About Electricity Pricing","items":[{"title":"Flat Rate vs. Tiered Rate","content":"Flat rate billing charges the same price per kWh regardless of consumption. Tiered rate (block rate) pricing divides consumption into bands: the first X kWh per month at a lower rate, the next Y kWh at a higher rate, and consumption above that at the highest rate. Tiered pricing encourages conservation by making high consumption more expensive. Many utilities in China, India, and parts of Europe use tiered pricing."},{"title":"Understanding Your Electricity Bill","content":"A typical electricity bill includes: energy charge (kWh × rate), fixed supply charge (flat monthly fee), taxes and levies, and sometimes peak/off-peak time-of-use pricing. The total bill may not be proportional to consumption alone. Smart meters with time-of-use (TOU) pricing charge more during peak hours (evenings) and less during off-peak hours (nights, weekends). Running dishwashers and EV chargers at night can significantly reduce bills."},{"title":"Global Electricity Prices","content":"Electricity prices vary widely globally. Approximate residential rates (2024): USA $0.12–0.22/kWh, Europe €0.15–0.35/kWh, UK £0.25–0.30/kWh, China ¥0.5–0.6/kWh, India ₹5–8/kWh, Japan ¥25–35/kWh, Australia $0.25–0.35/kWh. Countries with abundant hydro or nuclear power tend to have lower rates. Prices fluctuate with fuel costs, seasonal demand, and regulatory changes."},{"title":"Cost Reduction Strategies","content":"To reduce electricity costs: shift high-power appliances (washing machines, dishwashers, EV charging) to off-peak TOU hours if available, use smart thermostats to optimize HVAC scheduling, replace old inefficient appliances, install LED lighting throughout, add insulation to reduce heating/cooling loads, and consider rooftop solar to offset grid consumption. Small behavioral changes combined can reduce bills by 20–40%."}],"featuresTitle":"Key Features","features":["Flat-rate and 3-tier tiered pricing modes","Daily, monthly, and yearly cost calculation","Custom currency symbol for any country","Shows both kWh consumption and monetary cost"],"applicationsTitle":"Common Applications","applications":["Estimating monthly electricity bills for budget planning","Comparing costs of different appliances before purchase","Analyzing the payback period for energy-efficient upgrades","Small business and workshop electricity cost tracking","Solar panel ROI calculation based on offset consumption"]}},"electrical-frequencyWavelength":{"title":"Frequency to Wavelength Converter","description":"Convert between frequency and wavelength using f = c/λ. Supports Hz to THz and nm to km. Useful for RF, microwave, and optical engineering.","ui":{"freqToWave":"Frequency → Wavelength","waveToFreq":"Wavelength → Frequency","frequency":"Frequency","wavelength":"Wavelength","frequencyUnitHz":"Hz","frequencyUnitKHz":"kHz","frequencyUnitMHz":"MHz","frequencyUnitGHz":"GHz","frequencyUnitTHz":"THz","wavelengthUnitNM":"nm","wavelengthUnitUM":"µm","wavelengthUnitMM":"mm","wavelengthUnitCM":"cm","wavelengthUnitM":"m","wavelengthUnitKM":"km","calculate":"Convert","result":"Results","frequencyResult":"Frequency","wavelengthResult":"Wavelength","angularFrequency":"Angular Frequency (ω)","photonEnergy":"Photon Energy (eV)","band":"Frequency Band","freqPlaceholder":"e.g. 2.4","wavePlaceholder":"e.g. 0.125"},"guide":{"title":"How to Use","items":["Select conversion direction: 'Frequency → Wavelength' or 'Wavelength → Frequency'.","Enter the value and select the appropriate unit (Hz to THz for frequency, nm to km for wavelength).","Click 'Convert' to calculate the result.","The tool uses c = 299,792,458 m/s (speed of light in vacuum).","For media other than vacuum (e.g. fiber optic glass with n=1.5), wavelength in medium = wavelength in vacuum / n.","The photon energy in eV is also shown, which is useful for optical and RF applications."]},"knowledge":{"title":"About Frequency and Wavelength","items":[{"title":"The f = c/λ Relationship","content":"For electromagnetic waves in vacuum, frequency and wavelength are related by f = c/λ, where c = 299,792,458 m/s ≈ 3×10⁸ m/s. Higher frequency means shorter wavelength; lower frequency means longer wavelength. This relationship spans the entire electromagnetic spectrum from radio waves (km wavelength, kHz frequency) to gamma rays (pm wavelength, EHz frequency). The frequency determines the wave's energy; the wavelength determines its penetration and diffraction behavior."},{"title":"The Electromagnetic Spectrum","content":"Frequency bands: Radio (3 Hz–300 MHz, λ=1mm–100,000km), Microwave (300 MHz–300 GHz, λ=1mm–1m), Infrared (300 GHz–430 THz, λ=700nm–1mm), Visible (430–790 THz, λ=380–700nm): red=700nm, orange=620nm, yellow=580nm, green=530nm, blue=470nm, violet=400nm. UV (790 THz–30 PHz), X-ray (30 PHz–30 EHz), Gamma (>30 EHz). Each band interacts differently with matter and has distinct applications."},{"title":"Common Frequency Bands in Electronics","content":"Key RF bands: AM broadcast = 535–1705 kHz (λ≈175–560m), FM broadcast = 87.5–108 MHz (λ≈2.8–3.4m), WiFi 2.4 GHz (λ=12.5cm), WiFi 5 GHz (λ=6cm), WiFi 6E/6 GHz (λ=5cm), 4G LTE 700 MHz (λ=43cm) to 2.6 GHz (λ=11.5cm), 5G mmWave 24–100 GHz (λ=3–12.5mm), GPS L1 = 1575.42 MHz (λ=19cm). Antenna size is related to wavelength — half-wave dipoles are λ/2 long."},{"title":"Wavelength in Different Media","content":"In vacuum, speed of light c = 3×10⁸ m/s. In other media, the wave slows by the refractive index n: v = c/n. Wavelength in medium = λ_vacuum / n. For glass fiber (n≈1.5): 1550nm optical wavelength in vacuum = 1033nm in glass. In RF circuit traces (εr≈4), the effective wavelength is about half of the free-space value. This is why PCB antenna designs are shorter than free-space quarter-wave calculations would suggest."}],"featuresTitle":"Key Features","features":["Bidirectional conversion: frequency ↔ wavelength","Supports Hz to THz and nm to km unit ranges","Shows angular frequency ω and photon energy in eV","Identifies the electromagnetic spectrum band"],"applicationsTitle":"Common Applications","applications":["Antenna length calculation for radio and microwave systems","Optical fiber and laser wavelength conversion","RF cavity and waveguide resonator design","Spectroscopy and photonic device design","EMC wavelength estimation for shielding and filtering"]}},"electrical-impedance":{"title":"Impedance Calculator","description":"Calculate the total impedance Z of an RLC circuit. Enter resistance R, inductive reactance XL, and capacitive reactance XC to find Z and the phase angle.","ui":{"resistance":"Resistance R (Ω)","inductiveReactance":"Inductive Reactance XL (Ω)","capacitiveReactance":"Capacitive Reactance XC (Ω)","calculate":"Calculate","result":"Results","impedance":"Impedance Z","phaseAngle":"Phase Angle θ","netReactance":"Net Reactance (XL−XC)","ohms":"Ω","degrees":"°","inductiveDominant":"Inductive (current lags voltage)","capacitiveDominant":"Capacitive (current leads voltage)","resistivePure":"Purely resistive (resonance)","rPlaceholder":"e.g. 100","xlPlaceholder":"e.g. 50","xcPlaceholder":"e.g. 30"},"guide":{"title":"How to Use","items":["Enter the resistance R in ohms (real part of impedance).","Enter inductive reactance XL in ohms: XL = 2π × f × L.","Enter capacitive reactance XC in ohms: XC = 1 / (2π × f × C).","Click 'Calculate' to find total impedance Z = √(R² + (XL − XC)²).","Phase angle θ = arctan((XL − XC) / R). Positive θ = inductive, negative = capacitive.","Use the Reactance Calculator tool to first compute XL and XC from frequency and component values."]},"knowledge":{"title":"About Impedance","items":[{"title":"What is Impedance?","content":"Impedance (Z) is the total opposition to AC current flow in a circuit, combining resistance (R) and reactance (X). It is a complex quantity: Z = R + jX, where j is the imaginary unit. The magnitude is |Z| = √(R² + X²) and the phase angle θ = arctan(X/R). Unlike resistance (which is frequency-independent), reactance varies with frequency, making impedance frequency-dependent."},{"title":"Inductive vs. Capacitive Reactance","content":"Inductive reactance XL = 2πfL increases with frequency — inductors oppose rapid changes in current. Capacitive reactance XC = 1/(2πfC) decreases with frequency — capacitors oppose DC but allow AC. In a series RLC circuit, the net reactance is X = XL − XC. If XL > XC, the circuit is inductive (current lags voltage); if XC > XL, it is capacitive (current leads voltage); if XL = XC, resonance occurs."},{"title":"Phase Angle and Power Factor","content":"The phase angle θ = arctan((XL − XC) / R) represents the phase difference between voltage and current. The power factor PF = cos(θ) indicates what fraction of apparent power (VA) is real power (W). At θ = 0° (pure resistance), PF = 1 and all power is real. At θ = ±90° (pure reactance), PF = 0 and all power is reactive (no real energy consumed). Practical loads have PF between 0 and 1."},{"title":"Impedance Matching","content":"Maximum power transfer occurs when the source impedance equals the complex conjugate of the load impedance (Z_source = Z_load*). For real impedances, this means Z_source = Z_load. In RF circuits, impedance matching networks (L-networks, T-networks, π-networks) transform the load impedance to match the source, maximizing power transfer and minimizing reflections. This is critical in antenna systems and RF power amplifiers."}],"featuresTitle":"Key Features","features":["Calculates total impedance Z = √(R² + (XL−XC)²)","Computes phase angle θ = arctan((XL−XC)/R) in degrees","Shows whether the circuit is inductive, capacitive, or at resonance","Direct input of R, XL, and XC for flexibility"],"applicationsTitle":"Common Applications","applications":["RLC series and parallel circuit analysis","Audio crossover network design","RF impedance matching network calculations","Power factor correction in AC systems","Filter design verification"]}},"electrical-inductorCalculator":{"title":"Inductor Coil Inductance Calculator","description":"Calculate the inductance of a solenoid coil using the formula L = µ₀ × µᵣ × N² × A / l. Enter turns, area, length, and core permeability.","ui":{"turns":"Number of Turns (N)","area":"Cross-sectional Area (A)","length":"Core Length (l)","permeability":"Relative Permeability (µᵣ)","calculate":"Calculate","result":"Result","inductance":"Inductance","areaUnit":"mm²","lengthUnit":"mm","inductanceUnit":"µH","turnsPlaceholder":"e.g. 100","areaPlaceholder":"e.g. 50","lengthPlaceholder":"e.g. 30","permeabilityPlaceholder":"e.g. 1 (air core)"},"guide":{"title":"How to Use","items":["Enter the number of turns (N) — the total number of wire loops in the coil.","Enter the cross-sectional area (A) of the core in mm².","Enter the length (l) of the coil/core in mm.","Enter the relative permeability (µᵣ) of the core material: air=1, ferrite=100–10000, iron=200–5000.","Click 'Calculate' to get the inductance in µH (microhenries).","For air-core coils, use µᵣ = 1. For wound ferrite cores, check the datasheet for the AL value and convert."]},"knowledge":{"title":"About Inductance","items":[{"title":"The Inductance Formula","content":"The inductance of a solenoid is calculated as L = µ₀ × µᵣ × N² × A / l, where µ₀ = 4π × 10⁻⁷ H/m is the permeability of free space, µᵣ is the relative permeability of the core, N is the number of turns, A is the cross-sectional area in m², and l is the coil length in meters. This formula assumes a long, uniformly wound coil (solenoid approximation)."},{"title":"Effect of Core Material","content":"The core material dramatically affects inductance through the relative permeability µᵣ. Air core (µᵣ=1) gives the lowest inductance but no saturation. Ferrite cores (µᵣ=100–10,000) multiply inductance by that factor but saturate at high currents. Iron powder cores offer intermediate values with good DC bias performance. Core saturation reduces inductance and causes distortion in switching power supplies."},{"title":"Inductance and Energy Storage","content":"An inductor stores energy in its magnetic field: E = ½ × L × I². This energy storage is exploited in switch-mode power supplies (boost converters, buck converters), where the inductor transfers energy between switching cycles. The inductance value determines the current ripple: higher L means less ripple but a larger physical component. Choosing the right inductance is a key step in power supply design."},{"title":"Practical Coil Design Factors","content":"In practice, inductors also have DC resistance (DCR) from the wire, self-resonant frequency (SRF) above which they behave capacitively, and current rating (saturation and thermal). Wire gauge affects DCR and maximum current. Winding technique (single layer vs. multi-layer) affects capacitance and SRF. For RF applications, air-core coils with high SRF are preferred; for power applications, ferrite cores with high saturation current are chosen."}],"featuresTitle":"Key Features","features":["Calculates inductance using the solenoid formula L = µ₀µᵣN²A/l","Supports any core material via relative permeability input","Results in µH, nH, and mH units for convenience","Suitable for air-core, ferrite, and iron-powder coil design"],"applicationsTitle":"Common Applications","applications":["Designing RF coils for oscillators and filters","Power inductor design for switching power supplies","Calculating inductance of custom wound transformers","Antenna loading coil design for amateur radio","Educational demonstrations of magnetic field principles"]}},"electrical-lcResonance":{"title":"LC Resonant Frequency Calculator","description":"Calculate the resonant frequency of an LC circuit using f = 1/(2π√LC). Enter L and C, or solve for one component from a known frequency.","ui":{"inductance":"Inductance (L)","capacitance":"Capacitance (C)","frequency":"Frequency (f)","inductanceUnitNH":"nH","inductanceUnitUH":"µH","inductanceUnitMH":"mH","inductanceUnitH":"H","capacitanceUnitPF":"pF","capacitanceUnitNF":"nF","capacitanceUnitUF":"µF","frequencyUnitHz":"Hz","frequencyUnitKHz":"kHz","frequencyUnitMHz":"MHz","frequencyUnitGHz":"GHz","calculate":"Calculate","calcFrequency":"Calculate Frequency","calcCapacitance":"Calculate Capacitance","calcInductance":"Calculate Inductance","result":"Results","resonantFrequency":"Resonant Frequency","angularFrequency":"Angular Frequency (ω)","wavelength":"Wavelength in Air"},"guide":{"title":"How to Use","items":["To calculate resonant frequency: enter the inductance (L) and capacitance (C) values with units.","To calculate capacitance from frequency: enter the frequency and inductance.","To calculate inductance from frequency: enter the frequency and capacitance.","Click the appropriate 'Calculate' button for your chosen mode.","Results include the resonant frequency, angular frequency ω = 2πf, and equivalent wavelength.","Use this to design tank circuits, RF filters, and oscillators."]},"knowledge":{"title":"About LC Resonance","items":[{"title":"LC Resonance Formula","content":"The resonant frequency of an LC circuit is f = 1/(2π√(LC)), where L is in Henries and C is in Farads. At this frequency, the inductive reactance XL = 2πfL equals the capacitive reactance XC = 1/(2πfC), and they cancel each other out. The result is purely resistive impedance (the series resistance of real components). This cancellation is the essence of resonance."},{"title":"Series vs. Parallel Resonance","content":"In a series LC circuit at resonance, impedance is minimum (ideally zero for ideal components), causing maximum current. In a parallel (tank) LC circuit at resonance, impedance is maximum, causing minimum current from the source. Series resonance is used in bandpass filters and series-tuned circuits; parallel resonance forms tank circuits in oscillators, RF amplifiers, and impedance matching networks."},{"title":"Quality Factor (Q)","content":"The quality factor Q = (1/R)√(L/C) describes the sharpness of the resonance peak. A high Q means a narrow, tall resonance peak (sharp tuning), while a low Q gives a broader, flatter response. Practical LC circuits always have some resistance (wire resistance, core losses), which limits Q. RF tank circuits may have Q values of 50–300, while quartz crystals achieve Q values of 10,000 to 100,000."},{"title":"Energy Oscillation in LC Circuits","content":"At resonance, energy oscillates between the inductor's magnetic field and the capacitor's electric field. When the capacitor is fully charged, the inductor current is zero. As the capacitor discharges through the inductor, current builds up and the magnetic field stores energy. This continues sinusoidally at the resonant frequency. In an ideal (lossless) circuit, this oscillation continues forever, forming the basis of electronic oscillators."}],"featuresTitle":"Key Features","features":["Calculates resonant frequency from L and C using f=1/(2π√LC)","Solves for L or C from a known frequency","Shows angular frequency ω and equivalent wavelength","Supports nH to H and pF to µF input ranges"],"applicationsTitle":"Common Applications","applications":["Designing tank circuits for RF oscillators","Tuning LC bandpass and band-stop filters","Matching impedances in RF power amplifiers","Designing crystal-replacement resonators","Educational demonstration of resonance principles"]}},"electrical-ledResistor":{"title":"LED Current Limiting Resistor Calculator","description":"Calculate the required series resistor value and power rating for an LED circuit. Input supply voltage, LED forward voltage, and LED current.","ui":{"supplyVoltage":"Supply Voltage (V)","forwardVoltage":"LED Forward Voltage (Vf)","ledCurrent":"LED Current (mA)","calculate":"Calculate","result":"Results","resistorValue":"Required Resistance","resistorPower":"Minimum Power Rating","recommendedPower":"Recommended Power Rating (2× safety)","nearestStandard":"Nearest Standard Value","ohms":"Ω","kilohms":"kΩ","milliwatts":"mW","watts":"W","supplyVoltagePlaceholder":"e.g. 5","forwardVoltagePlaceholder":"e.g. 2.0","ledCurrentPlaceholder":"e.g. 20"},"guide":{"title":"How to Use","items":["Enter the supply voltage (Vs) — this is your power source voltage (e.g. 5V, 12V, 3.3V).","Enter the LED forward voltage (Vf) — check your LED datasheet (typically 1.8–3.5V depending on color).","Enter the desired LED current in mA — typically 10–20mA for standard LEDs, 1–5mA for low-power indicator LEDs.","Click 'Calculate' to get the required resistance value R = (Vs − Vf) / I.","Select the next higher standard resistor value (E12/E24 series) for your circuit.","Use a resistor rated at least 2× the calculated power dissipation (P = I² × R) for safety."]},"knowledge":{"title":"About LED Circuits","items":[{"title":"Why LEDs Need Current Limiting Resistors","content":"LEDs are not resistive devices — they have a nearly fixed forward voltage drop (Vf) regardless of current. Without a current limiting resistor, even a small increase in voltage causes an exponential rise in current, quickly destroying the LED. The series resistor absorbs the excess voltage (Vs − Vf) and limits current to a safe level. This simple R + LED series circuit is the most common LED driving method."},{"title":"Forward Voltage by LED Color","content":"Different LED colors have different forward voltages: Red ≈ 1.8–2.2V, Yellow/Orange ≈ 2.0–2.2V, Green ≈ 2.0–3.5V (varies by technology), Blue ≈ 3.0–3.5V, White ≈ 3.0–3.5V (white LEDs use a blue chip with phosphor). UV LEDs can have Vf up to 4V. Always check the datasheet for the specific LED you are using."},{"title":"Calculating the Resistor","content":"The formula is R = (Vs − Vf) / I, where Vs is supply voltage, Vf is LED forward voltage, and I is desired current in amps. Power dissipated in the resistor is P = (Vs − Vf) × I = I² × R. For example, a 5V supply with a red LED (Vf=2V) at 20mA: R = (5−2)/0.02 = 150Ω, P = 3×0.02 = 60mW. Use a 0.25W resistor (safety margin)."},{"title":"Multiple LEDs in Series","content":"For multiple LEDs in series, subtract the sum of all forward voltages: R = (Vs − ΣVf) / I. Ensure the supply voltage exceeds the total Vf sum. For parallel LEDs, each LED should have its own series resistor to balance current, as slight Vf differences cause uneven current sharing. Never connect LEDs in parallel without individual resistors."}],"featuresTitle":"Key Features","features":["Calculates exact resistor value using R = (Vs − Vf) / I","Shows minimum power rating and 2× safety recommendation","Suggests nearest standard E12/E24 resistor value","Covers all LED types: standard, high-power, RGB, indicator"],"applicationsTitle":"Common Applications","applications":["Indicator LEDs on PCBs and panel mounts","Arduino and Raspberry Pi LED projects","Status indicator lights in industrial equipment","LED lighting prototypes and hobby electronics","Educational electronics labs"]}},"electrical-ohmsLaw":{"title":"Ohm's Law Calculator","description":"Calculate voltage, current, or resistance using Ohm's Law (V = I × R). Enter any two known values to solve for the third.","ui":{"voltage":"Voltage (V)","current":"Current (A)","resistance":"Resistance (Ω)","calculate":"Calculate","result":"Result","solve":"Solve for","solveVoltage":"Voltage (V)","solveCurrent":"Current (I)","solveResistance":"Resistance (R)","voltageUnit":"V","currentUnit":"A","resistanceUnit":"Ω","powerResult":"Power","powerUnit":"W","enterTwo":"Enter any two values to calculate the third","leave_blank":"Leave the field you want to calculate blank"},"guide":{"title":"How to Use","items":["Select which quantity you want to calculate: Voltage (V), Current (I), or Resistance (R).","Enter the two known values in their respective fields.","Click 'Calculate' to instantly compute the unknown value.","The tool also calculates power (P = V × I) automatically.","Use SI prefixes if needed: mA (milliamps) = A × 0.001, kΩ (kilohms) = Ω × 1000.","To verify: multiply your calculated current by resistance — the result should equal your voltage."]},"knowledge":{"title":"About Ohm's Law","items":[{"title":"What is Ohm's Law?","content":"Ohm's Law states that the current (I) through a conductor is directly proportional to the voltage (V) across it and inversely proportional to its resistance (R). The formula is V = I × R. Named after German physicist Georg Simon Ohm (1789–1854), it is the most fundamental relationship in electrical engineering, forming the basis of circuit analysis."},{"title":"The Three Forms of the Formula","content":"Ohm's Law can be rearranged in three ways: V = I × R (voltage equals current times resistance), I = V / R (current equals voltage divided by resistance), and R = V / I (resistance equals voltage divided by current). Knowing any two values allows you to calculate the third. This triangle of relationships is the backbone of all basic circuit calculations."},{"title":"Power Calculation","content":"Once you know voltage and current, power can be calculated as P = V × I (watts). Combined with Ohm's Law, power can also be expressed as P = I² × R or P = V² / R. These relationships are used to determine heat dissipation in resistors, the efficiency of power supplies, and energy consumption in electrical systems."},{"title":"Limitations of Ohm's Law","content":"Ohm's Law applies to linear (ohmic) conductors such as metal resistors under constant temperature. It does not apply to non-linear components such as diodes, transistors, and LEDs, which have complex voltage-current relationships. Temperature, frequency, and material properties can all affect whether a material behaves ohmically."}],"featuresTitle":"Key Features","features":["Solve for voltage, current, or resistance with any two known values","Automatic power (P = V × I) calculation","Supports decimal and scientific notation input","Instant results with no page reload required","Useful for beginners and professionals in electronics"],"applicationsTitle":"Common Applications","applications":["Sizing resistors in electronic circuits","Calculating current draw of a device from its voltage and resistance","Determining required voltage for a given current and load","Power supply design and component selection","Educational use in physics and electrical engineering courses"]}},"electrical-parallelResistor":{"title":"Parallel Resistor Calculator","description":"Calculate the equivalent resistance of up to 10 resistors connected in parallel (1/R = 1/R1+1/R2+...).","ui":{"addResistor":"Add Resistor","removeResistor":"Remove","resistor":"Resistor","resistance":"Resistance (Ω)","supplyVoltage":"Supply Voltage (V, optional)","calculate":"Calculate","result":"Results","equivalentResistance":"Equivalent Resistance","totalCurrent":"Total Current","branchCurrent":"Branch Current","ohms":"Ω","kilohms":"kΩ","amps":"A","milliamps":"mA","resistancePlaceholder":"e.g. 1000"},"guide":{"title":"How to Use","items":["Enter resistance values (in Ω) for each parallel resistor.","Click 'Add Resistor' to add more parallel branches (up to 10).","Optionally enter a supply voltage to calculate total current and per-branch currents.","Click 'Calculate' to get the equivalent resistance using 1/R = 1/R1 + 1/R2 + ...","The equivalent resistance is always less than the smallest individual resistor.","For two equal resistors in parallel, the result is exactly half of one resistor."]},"knowledge":{"title":"About Parallel Resistors","items":[{"title":"Parallel Resistance Formula","content":"In a parallel circuit, all resistors share the same voltage but each carries a different current. The equivalent resistance is found using the reciprocal formula: 1/R_eq = 1/R1 + 1/R2 + ... + 1/Rn. For two resistors, this simplifies to R_eq = (R1 × R2) / (R1 + R2), known as the 'product over sum' formula. Parallel resistance is always less than the smallest resistor in the group."},{"title":"Current Division in Parallel Circuits","content":"Each parallel branch carries current inversely proportional to its resistance: I_n = V / R_n. Branches with lower resistance carry more current. The total current from the source equals the sum of all branch currents (Kirchhoff's Current Law). This current-sharing behavior makes parallel circuits ideal for providing multiple load paths while maintaining the same voltage."},{"title":"Comparing Series and Parallel","content":"In series circuits, resistances add directly (Rtotal increases), voltage divides, and current is the same everywhere. In parallel circuits, resistances combine reciprocally (Rtotal decreases), voltage is the same across all branches, and current divides. Real circuits often combine both configurations (series-parallel networks) to achieve complex impedance behavior and signal routing."},{"title":"Practical Parallel Resistor Uses","content":"Parallel resistors are used to: (1) achieve resistance values not available in standard series, (2) increase current-handling capacity by sharing power between multiple resistors, (3) reduce the overall resistance when lower values are needed, and (4) provide redundancy in critical circuits. High-power current shunts often use parallel resistor combinations to handle large currents."}],"featuresTitle":"Key Features","features":["Supports up to 10 resistors in parallel","Uses reciprocal formula: 1/R = 1/R1 + 1/R2 + ...","Optional voltage input for current calculation per branch","Dynamically add or remove parallel branches"],"applicationsTitle":"Common Applications","applications":["Achieving lower resistance values with available components","Distributing power across multiple resistors to manage heat","Current shunt design for high-current measurement","Load balancing in parallel power supply configurations","Circuit analysis and educational exercises"]}},"electrical-powerCalculator":{"title":"Electrical Power Calculator","description":"Calculate electrical power using P=VI, P=I²R, or P=V²/R. Enter any two known values to find the remaining quantities.","ui":{"voltage":"Voltage (V)","current":"Current (A)","resistance":"Resistance (Ω)","power":"Power (W)","calculate":"Calculate","result":"Results","formula":"Formula","formulaPVI":"P = V × I","formulaPI2R":"P = I² × R","formulaPV2R":"P = V² / R","selectFormula":"Select calculation formula","voltageUnit":"V","currentUnit":"A","resistanceUnit":"Ω","powerUnit":"W"},"guide":{"title":"How to Use","items":["Select the formula you want to use: P=VI, P=I²R, or P=V²/R.","Enter the two known values for the selected formula.","Click 'Calculate' to compute power and any other derivable values.","All three power formulas are derived from Ohm's Law — results are consistent.","Use P=VI when you have voltage and current measurements (e.g. from a multimeter).","Use P=I²R when you know the current through a resistor.","Use P=V²/R when you know the voltage across a load resistance."]},"knowledge":{"title":"About Electrical Power","items":[{"title":"Three Power Formulas","content":"Electrical power can be calculated in three equivalent ways: P = V × I (Watts = Volts × Amps), P = I² × R (power from current and resistance), and P = V² / R (power from voltage and resistance). All three formulas are mathematically equivalent when combined with Ohm's Law (V = IR), so choose whichever two values you know."},{"title":"What is Electrical Power?","content":"Electrical power (measured in Watts, W) is the rate at which electrical energy is transferred or consumed. A 100W light bulb consumes 100 joules of energy per second. Power equals the product of voltage (the driving force) and current (the flow of charge). Understanding power is essential for sizing wires, fuses, transformers, and power supplies correctly."},{"title":"Power Dissipation in Resistors","content":"When current flows through a resistor, electrical energy is converted to heat. The power dissipated is P = I² × R. This is why resistors have power ratings (e.g., 0.25W, 0.5W, 1W). If the actual power exceeds the rating, the component may burn out. Always select resistors with a power rating at least twice the calculated dissipation for safety margin."},{"title":"AC vs DC Power","content":"In DC circuits, power is simply P = V × I. In AC circuits, the calculation involves the power factor (PF): real power P = V × I × PF (in watts), apparent power S = V × I (in volt-amperes, VA), and reactive power Q (in VAR). For purely resistive loads, PF = 1 and P = V × I. For inductive/capacitive loads, PF < 1 and some power is reactive."}],"featuresTitle":"Key Features","features":["Supports three power calculation formulas: P=VI, P=I²R, P=V²/R","Automatically derives all four quantities (P, V, I, R) from two inputs","Instant calculation with clear labeled results","Covers both DC circuit analysis and component sizing"],"applicationsTitle":"Common Applications","applications":["Calculating heat dissipation in resistors and components","Sizing power supplies for electronic projects","Determining electrical energy consumption of appliances","Designing motor drives and power converters","Verifying component ratings before building a circuit"]}},"electrical-powerConsumption":{"title":"Power Consumption Calculator","description":"Calculate daily, monthly, and yearly electrical energy consumption in kWh. Enter device wattage and daily usage hours.","ui":{"power":"Device Power (W)","hoursPerDay":"Hours Used per Day","daysPerMonth":"Days per Month","calculate":"Calculate","result":"Energy Consumption","dailyKwh":"Daily Consumption","monthlyKwh":"Monthly Consumption","yearlyKwh":"Yearly Consumption","kwhUnit":"kWh","powerPlaceholder":"e.g. 1000","hoursPlaceholder":"e.g. 8","addDevice":"Add Device","removeDevice":"Remove","device":"Device","deviceName":"Device Name","totalDaily":"Total Daily","totalMonthly":"Total Monthly","totalYearly":"Total Yearly"},"guide":{"title":"How to Use","items":["Enter the device power rating in watts (W) — found on the product label or specifications.","Enter the average number of hours the device is used per day.","Optionally adjust the days per month (default 30).","Click 'Calculate' to see daily, monthly, and yearly energy consumption in kWh.","Add multiple devices to calculate total household or workshop consumption.","Formula: kWh = Watts × Hours / 1000. One kWh = one unit of electricity on your bill."]},"knowledge":{"title":"About Power Consumption","items":[{"title":"What is a kWh?","content":"A kilowatt-hour (kWh) is the unit of energy used by electricity meters. One kWh = 1000W running for 1 hour = the energy used by a 100W light bulb running for 10 hours. Electricity bills charge per kWh (also called a 'unit'). In most countries, residential electricity costs between $0.05 and $0.30 per kWh. Understanding kWh helps you identify which appliances consume the most energy."},{"title":"Typical Appliance Power Ratings","content":"Common appliance power ratings: LED bulb 5–15W, incandescent bulb 40–100W, ceiling fan 30–75W, desktop computer 150–300W, laptop 30–70W, microwave 600–1500W, electric kettle 1500–3000W, washing machine 500–2500W, air conditioner 700–3500W, electric water heater 1500–4000W. High-wattage appliances used daily (air conditioners, water heaters) dominate electricity bills."},{"title":"Standby Power Consumption","content":"Most electronic devices consume power even when 'off' or in standby mode. Typical standby power: TV 0.5–3W, set-top box 10–20W, desktop computer 5–20W, phone charger 0.1–0.5W, microwave 2–5W. While individual standby draws are small, the total across all devices in a home can represent 5–10% of the electricity bill. Smart power strips and smart plugs can eliminate standby waste."},{"title":"Reducing Energy Consumption","content":"Key strategies: replace incandescent bulbs with LEDs (75% energy saving), use inverter air conditioners and refrigerators (30–50% saving), set correct thermostat temperatures, unplug chargers and devices when not in use, use Energy Star certified appliances, install smart meters to track real-time consumption. Reducing consumption by 20% through efficiency measures typically saves hundreds of dollars annually."}],"featuresTitle":"Key Features","features":["Calculates kWh consumption per day, month, and year","Multi-device mode for total household calculation","Simple formula: kWh = W × hours / 1000","Customizable days per month setting"],"applicationsTitle":"Common Applications","applications":["Estimating electricity costs before purchasing appliances","Identifying high-consumption devices in the home","Energy audit for residential and commercial buildings","Sizing solar panel systems for load coverage","Industrial equipment energy reporting"]}},"electrical-rcTimeConstant":{"title":"RC Time Constant Calculator","description":"Calculate the RC circuit time constant (τ = R × C) and charging/discharging times to various voltage percentages.","ui":{"resistance":"Resistance (R)","capacitance":"Capacitance (C)","resistanceUnit":"Ω","capacitanceUnit":"µF","resistanceUnitOhm":"Ω","resistanceUnitKOhm":"kΩ","resistanceUnitMOhm":"MΩ","capacitanceUnitPF":"pF","capacitanceUnitNF":"nF","capacitanceUnitUF":"µF","calculate":"Calculate","result":"Results","timeConstant":"Time Constant (τ)","timeConstantUnit":"ms","chargeTable":"Charging / Discharging Times","percentage":"Charge Level","time":"Time","percent632":"63.2% (1τ)","percent865":"86.5% (2τ)","percent950":"95.0% (3τ)","percent982":"98.2% (4τ)","percent993":"99.3% (5τ)"},"guide":{"title":"How to Use","items":["Enter the resistance value (R) and select the unit (Ω, kΩ, or MΩ).","Enter the capacitance value (C) and select the unit (pF, nF, or µF).","Click 'Calculate' to compute the time constant τ = R × C.","The table shows the time to reach each charge percentage (1τ through 5τ).","After 5 time constants (5τ), the capacitor is considered fully charged (99.3%).","These values also apply to discharging: at 1τ, the capacitor retains 36.8% of its charge."]},"knowledge":{"title":"About RC Circuits","items":[{"title":"The RC Time Constant","content":"The time constant τ (tau) = R × C is the fundamental parameter of an RC (resistor-capacitor) circuit. It defines the rate of charging and discharging. In one time constant, a charging capacitor reaches 63.2% of the supply voltage. In five time constants, it reaches 99.3%, which is considered 'fully charged' for practical purposes. The unit of τ is seconds when R is in ohms and C is in farads."},{"title":"Exponential Charging Curve","content":"The capacitor voltage during charging follows: V(t) = Vs × (1 − e^(−t/τ)), where Vs is the supply voltage. During discharging: V(t) = V₀ × e^(−t/τ), where V₀ is the initial voltage. The exponential nature means the capacitor charges quickly at first and then increasingly slowly. This non-linear behavior is important for timing circuits, filters, and integrators."},{"title":"RC Filters and Signal Processing","content":"The RC time constant determines the cutoff frequency of an RC low-pass or high-pass filter: f_c = 1/(2π × R × C). A low-pass filter passes frequencies below f_c and attenuates those above. A high-pass filter does the reverse. RC filters are used extensively in audio processing, power supply smoothing, anti-aliasing before ADC conversion, and signal conditioning."},{"title":"RC Timing Circuits","content":"RC circuits are used in timer ICs like the 555 timer, where the charge/discharge time determines the output frequency or pulse width. Typical applications include delay circuits, debounce circuits for mechanical switches, oscillators, and PWM generators. The 555 timer in astable mode: frequency = 1.44 / ((R1+2×R2) × C), where R1, R2 and C form the RC network."}],"featuresTitle":"Key Features","features":["Calculates τ = R × C with flexible unit selection","Shows charging/discharging times for 1τ through 5τ (63.2% to 99.3%)","Results in seconds, milliseconds, microseconds, or nanoseconds","Useful for filter cutoff frequency estimation"],"applicationsTitle":"Common Applications","applications":["555 timer circuit design (monostable and astable modes)","RC filter cutoff frequency calculation","Capacitor charge/discharge timing in power circuits","Switch debounce delay circuit design","ADC anti-aliasing filter design"]}},"electrical-reactance":{"title":"Reactance Calculator","description":"Calculate inductive reactance XL = 2πfL and capacitive reactance XC = 1/(2πfC). Enter frequency and component value.","ui":{"frequency":"Frequency (f)","inductance":"Inductance (L)","capacitance":"Capacitance (C)","frequencyUnitHz":"Hz","frequencyUnitKHz":"kHz","frequencyUnitMHz":"MHz","inductanceUnitNH":"nH","inductanceUnitUH":"µH","inductanceUnitMH":"mH","capacitanceUnitPF":"pF","capacitanceUnitNF":"nF","capacitanceUnitUF":"µF","calculate":"Calculate","calcXL":"Calculate XL","calcXC":"Calculate XC","result":"Results","inductiveReactance":"Inductive Reactance (XL)","capacitiveReactance":"Capacitive Reactance (XC)","ohms":"Ω","angularFrequency":"Angular Frequency (ω)","radPerSec":"rad/s"},"guide":{"title":"How to Use","items":["Enter the signal frequency with unit (Hz, kHz, or MHz).","For inductive reactance: enter the inductance value (nH, µH, or mH) and click 'Calculate XL'.","For capacitive reactance: enter the capacitance value (pF, nF, or µF) and click 'Calculate XC'.","Results show XL = 2πfL or XC = 1/(2πfC) in ohms.","You can calculate both at the same time if you enter all three values.","Use these results in the Impedance Calculator to find total Z and phase angle."]},"knowledge":{"title":"About Reactance","items":[{"title":"Inductive Reactance","content":"Inductive reactance XL = 2πfL (in ohms) represents the opposition of an inductor to AC current. It increases linearly with frequency: at higher frequencies, the inductor changes current more rapidly, inducing a larger back-EMF that opposes the current. At DC (f=0), XL=0 — the inductor is a short circuit. At very high frequencies, XL becomes large — the inductor blocks high-frequency signals. This is the basis of high-pass and bandpass filters."},{"title":"Capacitive Reactance","content":"Capacitive reactance XC = 1/(2πfC) (in ohms) represents the opposition of a capacitor to AC current. It decreases with increasing frequency: at higher frequencies, the capacitor charges and discharges more rapidly, allowing more current. At DC (f=0), XC = ∞ — the capacitor is an open circuit. At very high frequencies, XC approaches zero — the capacitor is nearly a short circuit. This frequency-dependent behavior enables filtering and impedance matching."},{"title":"Reactance vs. Resistance","content":"Resistance dissipates energy as heat and is frequency-independent. Reactance stores energy (inductors in magnetic fields, capacitors in electric fields) and is frequency-dependent. While resistance always opposes current, reactance either opposes (in phase opposition) or assists current flow depending on the phase relationship. In complex impedance notation: Z = R + jXL − jXC, where j indicates the imaginary (reactive) component."},{"title":"Frequency Response Design","content":"Understanding reactance at different frequencies is key to filter design. An RC low-pass filter has XC = R at the cutoff frequency: f_c = 1/(2πRC). An RL high-pass filter has XL = R at cutoff: f_c = R/(2πL). Combining reactances (LC circuits) creates sharper filter responses. Audio equalizers, speaker crossovers, RF amplifiers, and switching power supply filters all rely on carefully calculated reactances."}],"featuresTitle":"Key Features","features":["Calculates XL = 2πfL and XC = 1/(2πfC) simultaneously","Flexible unit selection: Hz/kHz/MHz, nH/µH/mH, pF/nF/µF","Shows angular frequency ω = 2πf","Results feed directly into impedance and filter calculations"],"applicationsTitle":"Common Applications","applications":["Filter cutoff frequency verification","RF circuit impedance analysis","Audio crossover component selection","Switching power supply inductor and capacitor sizing","AC circuit analysis for education and design"]}},"electrical-resistorColorCode":{"title":"Resistor Color Code Calculator","description":"Decode resistor color bands to find resistance value and tolerance, or encode a resistance value to find the color bands. Supports 4-band and 5-band resistors.","ui":{"decode":"Decode (Color → Value)","encode":"Encode (Value → Color)","bands4":"4-Band Resistor","bands5":"5-Band Resistor","band1":"Band 1 (1st digit)","band2":"Band 2 (2nd digit)","band3":"Band 3 (3rd digit)","band4Multiplier4":"Band 4 (Multiplier)","band4Tolerance4":"Band 4 (Tolerance) — for 4-band only","band5Tolerance":"Band 5 (Tolerance)","band4Multiplier5":"Band 4 (Multiplier) — for 5-band","multiplier":"Multiplier","tolerance":"Tolerance","resistanceValue":"Resistance Value (Ω)","result":"Result","ohms":"Ω","kilohms":"kΩ","megaohms":"MΩ","calculate":"Calculate","selectColor":"Select color","black":"Black","brown":"Brown","red":"Red","orange":"Orange","yellow":"Yellow","green":"Green","blue":"Blue","violet":"Violet","grey":"Grey","white":"White","gold":"Gold","silver":"Silver","none":"None"},"guide":{"title":"How to Use","items":["Select '4-Band' or '5-Band' mode depending on your resistor type.","In Decode mode: select the color of each band from left to right. The resistance value and tolerance are displayed instantly.","In Encode mode: enter the desired resistance value in ohms. The tool will show the matching color bands.","For 4-band resistors: Band 1 & 2 are digits, Band 3 is multiplier, Band 4 is tolerance.","For 5-band resistors: Band 1, 2 & 3 are digits, Band 4 is multiplier, Band 5 is tolerance.","Gold and silver are only used as multiplier or tolerance bands, never as digit bands."]},"knowledge":{"title":"About Resistor Color Codes","items":[{"title":"The Color Code System","content":"Resistor color codes are standardized under IEC 60062. Each color represents a digit (0–9), a multiplier power of 10, or a tolerance percentage. The system was introduced in the 1920s when resistor bodies were too small for printed text. Reading from left to right, the bands encode the resistance value and its precision (tolerance)."},{"title":"4-Band vs 5-Band Resistors","content":"Standard resistors use 4 color bands: two significant digits, a multiplier, and a tolerance band (gold=±5%, silver=±10%). Precision resistors use 5 bands: three significant digits, a multiplier, and a tolerance (brown=±1%, red=±2%, green=±0.5%). 5-band resistors are used where tight tolerance is required, such as in precision measurement circuits."},{"title":"Memory Aid for Color Order","content":"A common mnemonic for the color digit sequence (Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Grey=8, White=9) is: 'B.B. ROY of Great Britain has a Very Good Wife.' The first letters match B=0, B=1, R=2, O=3, Y=4, G=5, B=6, V=7, G=8, W=9."},{"title":"Reading the Multiplier Band","content":"The multiplier band tells you the power of 10 to multiply the digit value by. For example, Red (×100) on a 4-band resistor with digits 4 and 7 gives 47 × 100 = 4,700Ω = 4.7kΩ. Gold (×0.1) and Silver (×0.01) multipliers are used for values below 10Ω. Always hold the resistor so the tolerance band (gold/silver) is on the right."}],"featuresTitle":"Key Features","features":["Supports both 4-band and 5-band resistor decoding","Bidirectional: decode colors to value or encode value to colors","Visual color band display with accurate color representation","Shows tolerance range (min/max resistance values)","Handles standard E12, E24, E96 series values"],"applicationsTitle":"Common Applications","applications":["Identifying resistor values without a multimeter","Selecting correct resistors for circuit assembly","Quality checking component bins and storage","Teaching electronics fundamentals in schools and workshops","PCB assembly and repair work"]}},"electrical-seriesResistor":{"title":"Series Resistor Calculator","description":"Calculate the total resistance of up to 10 resistors in series (R = R1+R2+...). Also shows the voltage drop across each resistor.","ui":{"addResistor":"Add Resistor","removeResistor":"Remove","resistor":"Resistor","resistance":"Resistance (Ω)","supplyVoltage":"Supply Voltage (V, optional)","calculate":"Calculate","result":"Results","totalResistance":"Total Resistance","totalCurrent":"Circuit Current","voltageDrop":"Voltage Drop","percentage":"Percentage","ohms":"Ω","kilohms":"kΩ","amps":"A","milliamps":"mA","volts":"V","resistancePlaceholder":"e.g. 1000"},"guide":{"title":"How to Use","items":["Enter resistor values (in Ω) in each field. Start with at least 2 resistors.","Click 'Add Resistor' to add more (up to 10 total).","Optionally enter the supply voltage to calculate current and voltage drops.","Click 'Calculate' to see the total resistance.","The voltage drop across each resistor is proportional to its resistance: V_n = Vtotal × R_n / R_total.","Use the 'Remove' button to delete a resistor from the calculation."]},"knowledge":{"title":"About Series Resistors","items":[{"title":"Series Resistance Formula","content":"In a series circuit, resistors are connected end-to-end so the same current flows through all of them. The total resistance is the arithmetic sum: R_total = R1 + R2 + R3 + ... + Rn. Unlike parallel circuits, series resistance always increases as more resistors are added. This is because each additional resistor is an additional obstacle to current flow in the single path."},{"title":"Voltage Division in Series Circuits","content":"In a series circuit with a fixed supply voltage, each resistor drops a voltage proportional to its resistance: V_n = V_supply × R_n / R_total. This is the basis of the voltage divider. The sum of all voltage drops equals the supply voltage (Kirchhoff's Voltage Law). Larger resistors drop more voltage; smaller ones drop less."},{"title":"Current in Series Circuits","content":"The same current flows through every component in a series circuit. If total resistance is R and supply is V, current I = V / R. This means if one component fails open (infinite resistance), the entire circuit stops working. This is why holiday lights wired in series all go dark when one bulb fails. Modern strings use shunt resistors or bypass mechanisms to avoid this."},{"title":"Practical Uses of Series Resistors","content":"Series resistors are used to: (1) limit current in LED circuits, (2) create voltage dividers with fixed ratios, (3) add impedance to dampen oscillations (snubbers), (4) measure current via voltage drop (current shunts), and (5) balance parallel-connected components. Precision resistors in series can achieve resistance values not available in standard E-series values."}],"featuresTitle":"Key Features","features":["Supports up to 10 resistors in a single calculation","Calculates total resistance and per-resistor voltage drops","Optional supply voltage input for current calculation","Dynamically add or remove resistors"],"applicationsTitle":"Common Applications","applications":["Adding series resistors to achieve non-standard resistance values","Designing current limiting circuits for LEDs and other devices","Calculating voltage drops for circuit analysis","Building resistor networks and attenuators","Educational circuit analysis exercises"]}},"electrical-voltageDivider":{"title":"Voltage Divider Calculator","description":"Calculate the output voltage of a resistor voltage divider, or find the resistor value needed for a desired output voltage.","ui":{"inputVoltage":"Input Voltage Vin (V)","r1":"Resistor R1 (Ω)","r2":"Resistor R2 (Ω)","outputVoltage":"Output Voltage Vout (V)","calculate":"Calculate","calcVout":"Calculate Vout","calcR2":"Calculate R2","result":"Results","vout":"Output Voltage (Vout)","r2result":"Required R2","currentDraw":"Current Draw","powerR1":"Power in R1","powerR2":"Power in R2","voltageUnit":"V","ohmsUnit":"Ω","currentUnit":"mA","powerUnit":"mW"},"guide":{"title":"How to Use","items":["To calculate output voltage: enter Vin, R1, and R2, then click 'Calculate Vout'.","To find R2 for a target output: enter Vin, R1, and desired Vout, then click 'Calculate R2'.","The formula is: Vout = Vin × R2 / (R1 + R2).","The tool also shows current draw through the divider and power dissipation in each resistor.","For accurate results, use the actual resistor values (including tolerance effects).","Note: voltage divider output voltage changes when a load is connected — use a buffer amplifier for low-impedance loads."]},"knowledge":{"title":"About Voltage Dividers","items":[{"title":"How a Voltage Divider Works","content":"A voltage divider consists of two series resistors (R1 and R2) connected between the supply voltage and ground. The output is taken from the junction between them. By Kirchhoff's Voltage Law and Ohm's Law: Vout = Vin × R2 / (R1 + R2). The output is always less than the input. The ratio R2/(R1+R2) determines what fraction of Vin appears at the output."},{"title":"Loading Effect","content":"When a load is connected to Vout, it forms a parallel combination with R2, reducing the effective lower resistance and causing Vout to drop. For minimal loading effect, the load resistance should be at least 10× the value of R2. If a stable output voltage is needed under varying loads, use a voltage regulator or an op-amp buffer (voltage follower) after the divider."},{"title":"Practical Design Considerations","content":"Choose resistor values that provide the desired Vout ratio while keeping current draw acceptable. Very high resistance values (MΩ) are prone to noise pickup; very low values waste power. A divider current of 1/10 the expected load current provides a reasonable trade-off. Always account for resistor tolerance — a 5% tolerance can shift Vout by up to ±10% in a worst-case scenario."},{"title":"Applications in Sensor Interfacing","content":"Voltage dividers are widely used to interface sensors with microcontrollers. For example, a thermistor + fixed resistor divider produces a voltage that varies with temperature. Strain gauges, light-dependent resistors (LDRs), and potentiometers are all used in voltage divider configurations. Level shifters use dividers to convert 5V logic signals down to 3.3V for modern microcontrollers."}],"featuresTitle":"Key Features","features":["Calculates Vout from Vin, R1, and R2","Reverse calculates R2 for a target Vout","Shows current draw and power dissipation per resistor","Handles wide resistance ranges (Ω to MΩ)"],"applicationsTitle":"Common Applications","applications":["Level shifting 5V signals to 3.3V for microcontroller inputs","Setting reference voltages for comparators and op-amps","Interfacing variable resistance sensors (thermistors, LDRs)","Biasing transistor base circuits","Battery voltage monitoring with ADC inputs"]}},"electrical-voltageDrop":{"title":"Voltage Drop Calculator","description":"Calculate voltage drop in copper or aluminum wires. Enter conductor material, cross-section, length, and current to get voltage loss in volts and percentage.","ui":{"material":"Conductor Material","copper":"Copper","aluminum":"Aluminum","crossSection":"Cross-Sectional Area","length":"One-way Length (m)","current":"Current (A)","voltage":"Supply Voltage (V)","calculate":"Calculate","result":"Results","voltageDrop":"Voltage Drop","dropPercentage":"Drop Percentage","loadVoltage":"Voltage at Load","wireResistance":"Wire Resistance","powerLoss":"Power Lost in Wire","mm2Unit":"mm²","voltUnit":"V","percentUnit":"%","ohmUnit":"Ω","wattUnit":"W"},"guide":{"title":"How to Use","items":["Select the conductor material: copper or aluminum.","Select the wire cross-sectional area from standard values (e.g. 1.5 mm², 2.5 mm²).","Enter the one-way wire length in meters.","Enter the load current in amperes.","Enter the supply voltage for percentage drop calculation.","Click 'Calculate' to see the voltage drop, percentage, load voltage, and power lost."]},"knowledge":{"title":"About Voltage Drop","items":[{"title":"Voltage Drop Formula","content":"Voltage drop ΔV = I × R_wire, where R_wire = ρ × 2L / A. Here, ρ is resistivity (copper: 1.72×10⁻⁸ Ω·m, aluminum: 2.82×10⁻⁸ Ω·m), L is the one-way length (m), and A is the cross-section (m²). The factor of 2 accounts for both conductors (outgoing + return). Power lost in the wire: P_loss = I² × R_wire."},{"title":"Effect of Wire Material","content":"Copper has about 40% lower resistivity than aluminum, making copper wires carry the same current with less voltage drop and heat generation. However, aluminum is lighter and cheaper for large conductors. Aluminum conductors are common in utility power distribution, overhead lines, and large building feeders. For identical cross-sections, aluminum will drop about 1.64× more voltage than copper."},{"title":"Temperature Effects","content":"Resistivity increases with temperature: R(T) = R₀ × (1 + α × ΔT), where α ≈ 0.00393/°C for copper. At 75°C (typical operating temperature), copper resistivity is about 22% higher than at 20°C. Electrical codes often use corrected resistivity values for cables operating at their rated temperature. Higher temperature also reduces ampacity due to insulation limitations."},{"title":"Acceptable Voltage Drop Limits","content":"Standards vary by application and region. NEC (USA) recommends max 3% for branch circuits and 5% total (feeder + branch). IEC 60364 suggests 4% for installations. For 12V automotive systems, even 0.5V (4%) can noticeably affect performance. For motor starting, voltage drop can cause reduced torque and motor heating. Sensitive electronic equipment may malfunction at drops above 5–10%."}],"featuresTitle":"Key Features","features":["Supports copper and aluminum conductors","Calculates voltage drop, load voltage, and power loss","Shows drop as both absolute (V) and percentage","Standard cross-section values from 0.5 to 120 mm²"],"applicationsTitle":"Common Applications","applications":["Verifying electrical installation compliance with codes","Evaluating long cable runs in industrial plants","Solar PV cable sizing for DC circuits","Motor feeder cable design","Automotive and marine wiring verification"]}},"electrical-wireSize":{"title":"Wire Size Calculator","description":"Calculate the minimum wire cross-sectional area (mm² or AWG) based on current, wire length, and allowable voltage drop.","ui":{"current":"Current (A)","length":"One-way Wire Length (m)","voltageDrop":"Allowable Voltage Drop (V)","voltage":"Supply Voltage (V)","material":"Conductor Material","copper":"Copper","aluminum":"Aluminum","calculate":"Calculate","result":"Results","minCrossSection":"Minimum Cross-Section","recommendedCrossSection":"Recommended Cross-Section","awgSize":"AWG Size","actualVoltageDrop":"Actual Voltage Drop","dropPercentage":"Drop Percentage","mm2Unit":"mm²","percentUnit":"%","currentPlaceholder":"e.g. 10","lengthPlaceholder":"e.g. 15","voltageDropPlaceholder":"e.g. 0.5","voltagePlaceholder":"e.g. 12"},"guide":{"title":"How to Use","items":["Enter the maximum current the wire must carry in amperes.","Enter the one-way wire length in meters (for a round trip, the formula uses 2× this length internally).","Enter the maximum allowable voltage drop in volts.","Select the conductor material: copper (lower resistance) or aluminum (lighter, higher resistance).","Click 'Calculate' to get the minimum cross-section in mm² and AWG.","Always select the next larger standard wire size from the calculated minimum."]},"knowledge":{"title":"About Wire Sizing","items":[{"title":"Wire Size Formula","content":"The minimum wire cross-sectional area is calculated as: A = (ρ × 2 × L × I) / ΔV, where ρ is the resistivity of the conductor (copper ≈ 1.72×10⁻⁸ Ω·m, aluminum ≈ 2.82×10⁻⁸ Ω·m), L is the one-way wire length (m), I is the current (A), and ΔV is the allowable voltage drop (V). The factor 2 accounts for both the outgoing and return conductors."},{"title":"Standard Wire Sizes","content":"Wire cross-sections follow international standards. IEC standard sizes (mm²): 0.5, 0.75, 1.0, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120 mm². AWG (American Wire Gauge) uses the inverse scale: smaller AWG = larger wire. Common AWG sizes: 24 (0.2mm²), 22 (0.33mm²), 20 (0.52mm²), 18 (0.82mm²), 16 (1.3mm²), 14 (2.1mm²), 12 (3.3mm²), 10 (5.3mm²)."},{"title":"Voltage Drop Standards","content":"Most electrical codes recommend a maximum voltage drop of 3–5% for branch circuits. For 12V DC systems, 3% = 0.36V drop; for 24V systems, 3% = 0.72V. Low-voltage systems (12V) are more sensitive to voltage drop than 120/240V AC systems. For critical loads like motors and solenoids, keep voltage drop below 2–3%. For lighting, up to 5% is generally acceptable."},{"title":"Ampacity vs. Voltage Drop","content":"Wire sizing has two constraints: ampacity (thermal current limit) and voltage drop (resistance limit). The ampacity limit prevents the wire from overheating; the voltage drop limit ensures the load receives adequate voltage. In short runs at high current, ampacity usually dominates. In long runs at moderate current, voltage drop often requires a larger wire than ampacity alone would suggest. Always check both constraints."}],"featuresTitle":"Key Features","features":["Calculates minimum mm² and equivalent AWG from current and drop constraints","Supports copper and aluminum conductors with correct resistivity","Shows recommended standard wire size and actual voltage drop","Voltage drop percentage for quick code compliance check"],"applicationsTitle":"Common Applications","applications":["Residential and commercial electrical wiring design","Automotive and marine 12V/24V DC wiring","Solar panel and battery cable sizing","Industrial motor and control panel wiring","LED strip and low-voltage lighting circuits"]}},"epochConverter":{"title":"Unix Epoch Time Converter","description":"Convert Unix epoch timestamp to readable date and time, and vice versa.","converter":{"timestampInput":{"title":"Timestamp to Date","placeholder":"Enter Unix timestamp (e.g., 1704067200)","button":"Convert to Date","format":"Seconds (10 digits) or Milliseconds (13 digits)"},"dateInput":{"title":"Date to Timestamp","placeholder":"Enter date (Y, M, D, H, M, S)","button":"Convert to Timestamp"},"results":{"gmt":"GMT / UTC Time","local":"Your Local Time","relative":"Relative Time","seconds":"Timestamp in Seconds","milliseconds":"Timestamp in Milliseconds","iso8601":"ISO 8601","rfc2822":"RFC 2822"},"currentTime":{"title":"Current Unix Epoch Time","seconds":"Seconds","milliseconds":"Milliseconds","pause":"Pause","resume":"Resume"},"error":{"invalidTimestamp":"Invalid timestamp format","invalidDate":"Invalid date format"}},"knowledge":{"title":"About Unix Epoch Time","sections":[{"title":"What is Epoch Time?","content":"The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since January 1, 1970 (midnight UTC/GMT), not counting leap seconds (in ISO 8601: 1970-01-01T00:00:00Z)."},{"title":"Seconds vs Milliseconds","content":"A 10-digit timestamp typically represents seconds, extending to the year 2286. A 13-digit timestamp represents milliseconds, providing more precise timing commonly used in JavaScript and Java."},{"title":"The Year 2038 Problem","content":"On January 19, 2038, the 32-bit signed integer used to store Unix time will overflow, returning to a negative value. Modern systems use 64-bit integers to avoid this issue, extending the range for billions of years."}]}},"eucJpEncoder":{"convert":{"title":"EUC-JP Encoding Converter","input":"Input","output":"Output","eucjpToUtf8":"EUC-JP → UTF-8","utf8ToEucjp":"UTF-8 → EUC-JP","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter EUC-JP encoded hex data...","textInputPlaceholder":"Enter Japanese text to convert...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["EUC-JP to UTF-8: Enter hex data","UTF-8 to EUC-JP: Enter Japanese text","Common encoding for Unix/Linux Japanese systems"]},"knowledge":{"title":"EUC-JP Knowledge","items":[{"title":"What is EUC-JP?","content":"EUC-JP (Extended Unix Code for Japanese) is widely used Japanese encoding on Unix systems."},{"title":"vs Shift-JIS","content":"EUC-JP is mainly for Unix/Linux, Shift-JIS for Windows. Different encoding but same character set."}],"featuresTitle":"Key Features","features":["Unix/Linux Japanese standard","Variable length (1-3 bytes)","ASCII compatible"],"applicationsTitle":"Common Applications","applications":["Unix/Linux Japanese systems","Japanese servers","Japanese email systems"]}},"eucKrEncoder":{"convert":{"title":"EUC-KR Encoding Converter","input":"Input","output":"Output","euckrToUtf8":"EUC-KR → UTF-8","utf8ToEuckr":"UTF-8 → EUC-KR","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter EUC-KR encoded hex data...","textInputPlaceholder":"Enter Korean text to convert...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["EUC-KR to UTF-8: Enter hex data","UTF-8 to EUC-KR: Enter Korean text","Korean character encoding conversion"]},"knowledge":{"title":"EUC-KR Knowledge","items":[{"title":"What is EUC-KR?","content":"EUC-KR (Extended Unix Code for Korean) is the Korean encoding standard based on KS X 1001 character set."},{"title":"Characteristics","content":"Double-byte encoding with 2350 Korean syllables and 4888 Hanja, was the primary Korean internet encoding."}],"featuresTitle":"Key Features","features":["Korean standard encoding","Double-byte encoding","ASCII compatible"],"applicationsTitle":"Common Applications","applications":["Korean websites","Korean email","Korean legacy systems"]}},"excelDate":{"title":"Excel Date Converter","description":"Convert between Excel serial dates and standard date/time formats easily.","inputTypeSelection":"Conversion Direction","typeSerialToDate":"Serial to Date","typeDateToSerial":"Date to Serial","inputSerialLabel":"Excel Serial Number","inputSerialPlaceholder":"e.g., 45000 or 45000.5","inputDateLabel":"Local Date & Time","inputDatePlaceholder":"Select date and time","systemTitle":"Date System","system1900":"1900 System (Windows default)","system1904":"1904 System (Mac default)","convertBtn":"Convert","resultTitle":"Conversion Result","resultSerial":"Serial Number","resultUtc":"UTC Time","resultLocal":"Local Time","copySuccess":"Copied successfully","clearForm":"Clear","now":"Current Time","aboutTitle":"About Excel Serial Dates","aboutContent":"Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. The fractional part of the number represents the time of day (e.g., .5 is 12:00 PM). Excel for Mac traditionally used the 1904 date system natively.","errorInvalidSerial":"Please enter a valid numeric serial value","errorInvalidDate":"Please select a valid date and time","guide":{"title":"How to Use","items":["Select the conversion direction: 'Serial → Date' to decode an Excel serial number, or 'Date → Serial' to get the Excel number for a date.","For Serial → Date: enter the Excel serial number (e.g. 45200) and select the date system (1900 or 1904), then click Convert.","For Date → Serial: pick the date/time from the picker and select the date system, then click Convert.","The result shows the Excel serial number, UTC time, and local time. Use copy buttons to copy any value.","Excel for Windows uses the 1900 system; Excel for Mac (older versions) uses the 1904 system."]},"knowledge":{"title":"About Excel Date Serial Numbers","sections":[{"title":"The 1900 Date System","content":"Excel's default date system counts days from January 0, 1900 (i.e., December 31, 1899 = 1). Day 1 = January 1, 1900. Note: Excel incorrectly treats 1900 as a leap year (serial 60 = Feb 29, 1900 which never existed), a legacy bug from Lotus 1-2-3 compatibility."},{"title":"The 1904 Date System","content":"The 1904 date system was introduced for older Excel for Mac versions and counts from January 1, 1904. When sharing files between Windows and Mac Excel, dates may appear shifted by 1,462 days (4 years + 1 day) if the systems differ."},{"title":"Practical Uses","content":"Excel serial numbers are useful for date arithmetic directly in spreadsheets — subtracting two dates gives the number of days between them. They are also used when importing/exporting data between Excel and databases, and for inter-system date conversion."}]}},"exifRemover":{"title":"EXIF Remover","description":"EXIF Remover is used to process images.","uploadTitle":"Upload Image to Remove EXIF","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is EXIF Remover","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"removeExif":"Remove EXIF","resultTitle":"Result (EXIF Removed)","outputFormat":"Output Format","originalFormat":"Original Format","quality":"Image Quality (JPEG/WEBP only)","tags":{"Make":"Make","Model":"Model","Orientation":"Orientation","XResolution":"X Resolution","YResolution":"Y Resolution","ResolutionUnit":"Resolution Unit","Software":"Software","ModifyDate":"Modify Date","ExposureTime":"Exposure Time","FNumber":"F-Number","ExposureProgram":"Exposure Program","ISO":"ISO Speed","ExifVersion":"EXIF Version","DateTimeOriginal":"Date/Time Original","CreateDate":"Create Date","ShutterSpeedValue":"Shutter Speed","ApertureValue":"Aperture Value","BrightnessValue":"Brightness","ExposureCompensation":"Exposure Compensation","MaxApertureValue":"Max Aperture","SubjectDistance":"Subject Distance","MeteringMode":"Metering Mode","Flash":"Flash","FocalLength":"Focal Length","ColorSpace":"Color Space","ExifImageWidth":"Exif Image Width","ExifImageHeight":"Exif Image Height","SceneType":"Scene Type","CustomRendered":"Custom Rendered","ExposureMode":"Exposure Mode","WhiteBalance":"White Balance","DigitalZoomRatio":"Digital Zoom Ratio","FocalLengthIn35mmFormat":"Focal Length In 35mm Format","SceneCaptureType":"Scene Capture Type","GPSLatitudeRef":"GPS Latitude Ref","GPSLatitude":"GPS Latitude","GPSLongitudeRef":"GPS Longitude Ref","GPSLongitude":"GPS Longitude","GPSAltitudeRef":"GPS Altitude Ref","GPSAltitude":"GPS Altitude","GPSTimeStamp":"GPS Time Stamp","GPSDateStamp":"GPS Date Stamp","ImageWidth":"Image Width","ImageHeight":"Image Height","latitude":"Latitude","longitude":"Longitude","BitDepth":"Bit Depth","ColorType":"Color Type","Compression":"Compression","Filter":"Filter","Interlace":"Interlace"},"selectiveTitle":"Select EXIF Properties to Remove","removeAll":"Remove All Metadata","removeAllHint":"Re-encodes the image to strip all hidden metadata (Supports all formats)","removeSelected":"Remove Selected","removeSelectedHint":"Removes only the checked properties, preserving original quality (JPEG only)","selectAll":"Select All","deselectAll":"Deselect All","unsupportedSelective":"Selective removal is not supported for this format. A full re-encode will be used to clear all metadata.","noExifFound":"No standard EXIF metadata detected in this image."},"exifViewer":{"title":"EXIF Viewer","description":"EXIF Viewer is used to process images.","uploadTitle":"Upload Image to View EXIF","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is EXIF Viewer","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"noExif":"No EXIF data found in this image.","exifData":"EXIF Data","property":"Property","value":"Value","tags":{"Make":"Make","Model":"Model","Orientation":"Orientation","XResolution":"X Resolution","YResolution":"Y Resolution","ResolutionUnit":"Resolution Unit","Software":"Software","ModifyDate":"Modify Date","ExposureTime":"Exposure Time","FNumber":"F-Number","ExposureProgram":"Exposure Program","ISO":"ISO Speed","ExifVersion":"EXIF Version","DateTimeOriginal":"Date/Time Original","CreateDate":"Create Date","ShutterSpeedValue":"Shutter Speed","ApertureValue":"Aperture Value","BrightnessValue":"Brightness","ExposureCompensation":"Exposure Compensation","MaxApertureValue":"Max Aperture","SubjectDistance":"Subject Distance","MeteringMode":"Metering Mode","Flash":"Flash","FocalLength":"Focal Length","ColorSpace":"Color Space","ExifImageWidth":"Exif Image Width","ExifImageHeight":"Exif Image Height","SceneType":"Scene Type","CustomRendered":"Custom Rendered","ExposureMode":"Exposure Mode","WhiteBalance":"White Balance","DigitalZoomRatio":"Digital Zoom Ratio","FocalLengthIn35mmFormat":"Focal Length In 35mm Format","SceneCaptureType":"Scene Capture Type","GPSLatitudeRef":"GPS Latitude Ref","GPSLatitude":"GPS Latitude","GPSLongitudeRef":"GPS Longitude Ref","GPSLongitude":"GPS Longitude","GPSAltitudeRef":"GPS Altitude Ref","GPSAltitude":"GPS Altitude","GPSTimeStamp":"GPS Time Stamp","GPSDateStamp":"GPS Date Stamp","ImageWidth":"Image Width","ImageHeight":"Image Height","latitude":"Latitude","longitude":"Longitude","BitDepth":"Bit Depth","ColorType":"Color Type","Compression":"Compression","Filter":"Filter","Interlace":"Interlace"}},"exponentCalculator":{"title":"Exponent Calculator","description":"Calculate exponents and powers. Support for negative and fractional exponents.","keywords":"exponent calculator, power calculator, exponential calculator","category":"Math","base":"Base","exponent":"Exponent","calculate":"Calculate","result":"Result","clear":"Clear","guide":{"title":"How to use","items":["Enter the base number.","Enter the exponent (power).","The result will be calculated instantly."]},"knowledge":{"title":"About Exponents","introduction":"Exponentiation is a mathematical operation, written as b^n, involving two numbers, the base b and the exponent or power n.","items":[{"title":"Rules","content":"b^0 = 1\nb^-n = 1/b^n"}],"featuresTitle":"Features","features":["Calculate powers","Support for negative exponents","Support for decimal bases/exponents"],"applicationsTitle":"Applications","applications":["Physics","Compound interest","Population growth"]}},"factorialCalculator":{"title":"Factorial Calculator","description":"Calculate the factorial of a non-negative integer.","keywords":"factorial calculator, calculate factorial","category":"Math","number":"Number","calculate":"Calculate","result":"Result","clear":"Clear","guide":{"title":"How to use","items":["Enter a non-negative integer.","The calculator will display the factorial (n!)."]},"knowledge":{"title":"About Factorials","introduction":"The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.","items":[{"title":"Formula","content":"n! = n * (n-1) * ... * 1"}],"featuresTitle":"Features","features":["Calculate high-value factorials","Instant results"],"applicationsTitle":"Applications","applications":["Combinatorics","Probability theory","Algebra"]}},"faviconGenerator":{"title":"Favicon Generator","description":"Favicon Generator is used to process images.","uploadTitle":"Upload Image to Generate Favicon","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Favicon Generator","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"settings":"Favicon Settings","sizes":"Included Sizes","generate":"Generate & Download .ico"},"fibonacciGenerator":{"title":"Fibonacci Generator","description":"Generate the Fibonacci sequence up to N terms.","keywords":"fibonacci generator, fibonacci sequence, fibonacci numbers","category":"Math","terms":"Number of Terms","generate":"Generate","result":"Fibonacci Sequence","clear":"Clear","guide":{"title":"How to Use","items":["Enter the number of terms you want to generate.","Click 'Generate'.","The Fibonacci sequence will be displayed."]},"knowledge":{"title":"About Fibonacci Sequence","introduction":"The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones.","items":[{"title":"Formula","content":"F(n) = F(n-1) + F(n-2), with F(0)=0, F(1)=1"}],"featuresTitle":"Features","features":["Generate sequence up to custom length","Instant calculation"],"applicationsTitle":"Applications","applications":["Algorithm analysis","Financial markets (Fibonacci retracement)","Nature (Golden ratio)"]}},"fileHash":{"dragAndDrop":"Drag and drop a file here, or ","browse":"browse","case":{"upper":"Upper Case","lower":"Lower Case"}},"finance-amortization":{"title":"Amortization Schedule","description":"Generate a complete month-by-month loan repayment table","loanAmount":"Loan Amount","interestRate":"Annual Interest Rate","loanTerm":"Loan Term","termYears":"Years","termMonths":"Months","calculateButton":"Generate Schedule","month":"Month","payment":"Payment","principal":"Principal","interest":"Interest","balance":"Remaining Balance","totalPayment":"Total Payment","totalPrincipal":"Total Principal","totalInterest":"Total Interest","monthlyPayment":"Monthly Payment","showAll":"Show All","collapse":"Show Less","result":"Enter values above to generate schedule","guide":{"title":"How to Use","items":["Enter the total loan amount.","Enter the annual interest rate.","Select the loan term in years or months.","Click 'Generate Schedule' to create the full amortization table.","The table shows how each payment is split between principal and interest."]},"knowledge":{"title":"About Amortization","items":[{"title":"What is Amortization?","content":"Amortization is the process of paying off a loan through regular, equal payments over time. Each payment covers the monthly interest first, then the remainder reduces the principal. Early in the loan, most of the payment goes to interest. As the balance decreases, more goes to principal."},{"title":"Reading the Schedule","content":"In the first payment, interest = (loan balance × monthly rate). Principal = payment − interest. The new balance = old balance − principal paid. Over time, as the balance decreases, interest charges decrease and more of each payment goes to reducing the balance."},{"title":"Front-Loaded Interest","content":"With a standard amortizing loan, interest is front-loaded. On a 30-year mortgage, in the first year most of each payment is interest. By year 15 roughly half goes to principal. This is why refinancing early can save significantly — you restart the cycle with more interest going to the bank."},{"title":"Using the Schedule for Planning","content":"Use the amortization schedule to plan extra payments. If you pay one extra month's principal in month 1, it eliminates the payment due in month 2. Making regular extra principal payments can shorten a 30-year mortgage by 5-10 years and save tens of thousands in interest."}],"featuresTitle":"Key Features","features":["Complete month-by-month breakdown of principal, interest, and balance","Summary totals for total payment, principal, and interest","Expandable table: first 24 rows shown, with option to view all","Clear visualization of how loan balance decreases over time"]}},"finance-cagr-calculator":{"title":"CAGR Calculator","description":"Calculate Compound Annual Growth Rate for any investment","beginningValue":"Beginning Value","endingValue":"Ending Value","numberOfYears":"Number of Years","calculateButton":"Calculate CAGR","cagr":"CAGR","totalReturn":"Total Return","growthOf1000":"Growth of $1,000","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the beginning value of the investment.","Enter the ending value of the investment.","Enter the number of years between beginning and ending values.","Click 'Calculate CAGR' to see the compound annual growth rate.","Use CAGR to compare performance of different investments over time."]},"knowledge":{"title":"About CAGR","items":[{"title":"CAGR Formula","content":"CAGR = (Ending Value / Beginning Value)^(1 / Years) − 1. For example, an investment that grew from $10,000 to $18,000 over 6 years: CAGR = (18,000/10,000)^(1/6) − 1 = 1.8^0.1667 − 1 = 10.3%. This means the investment grew at an equivalent steady rate of 10.3% per year."},{"title":"Why Use CAGR","content":"CAGR smooths out year-to-year volatility to show the steady-state growth rate. An investment might gain 30% one year and lose 20% the next — the average is 5% but the CAGR correctly shows a lower return. CAGR is the most accurate single number for describing investment performance over multiple years."},{"title":"CAGR Benchmarks","content":"Historical benchmarks for CAGR: US S&P 500 index 10-year CAGR ≈ 10–13%, global diversified portfolio ≈ 7–9%, real estate ≈ 3–7% (price appreciation only), gold ≈ 5–8% over very long periods. Individual stocks vary widely. A CAGR above 15% consistently over 10+ years is exceptional."},{"title":"CAGR vs. Average Annual Return","content":"CAGR and average annual return are different. If an investment gains 100% one year and loses 50% the next, the average return is 25% but the CAGR is 0% (you're back to where you started). CAGR is always more accurate for measuring actual wealth created. Use CAGR, not simple averages, for investment performance."}],"featuresTitle":"Key Features","features":["Precise CAGR calculation using the standard formula","Shows total return percentage alongside the CAGR","Illustrates growth by showing what $1,000 would grow to","Useful for mutual fund, stock portfolio, and business revenue analysis"]}},"finance-car-loan":{"title":"Car Loan Calculator","description":"Calculate monthly car payments with trade-in and down payment","carPrice":"Car Price","downPayment":"Down Payment","tradeIn":"Trade-in Value","interestRate":"Annual Interest Rate","loanTerm":"Loan Term (months)","calculateButton":"Calculate","loanAmount":"Loan Amount","monthlyPayment":"Monthly Payment","totalInterest":"Total Interest","totalCost":"Total Cost","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the car's purchase price.","Enter your down payment amount and trade-in vehicle value (if any).","Enter the annual interest rate from your lender.","Select the loan term in months (24, 36, 48, 60, or 72 months are common).","Click 'Calculate' to see your monthly payment and total loan cost."]},"knowledge":{"title":"About Car Loans","items":[{"title":"How Loan Amount is Determined","content":"Your auto loan amount = Car Price − Down Payment − Trade-in Value. If you buy a $30,000 car with $5,000 down and trade in your old car for $8,000, your financed amount is only $17,000. Reducing the financed amount significantly lowers both monthly payments and total interest."},{"title":"Typical Car Loan Terms","content":"Auto loans commonly range from 24 to 84 months. Shorter terms (24–36 months) mean higher payments but less interest. Longer terms (60–84 months) lower monthly payments but increase total cost. A 60-month loan at 7% on $25,000 costs $4,701 in interest; the same loan at 84 months costs $6,669."},{"title":"New vs. Used Car Rates","content":"New car loans typically have lower interest rates than used car loans because new vehicles have higher resale value as collateral. Used car loans often carry rates 1–3% higher. Your credit score also greatly impacts your rate — excellent credit (720+) can qualify for rates near 0% from some manufacturers."},{"title":"Total Cost of Car Ownership","content":"The sticker price is just the beginning. Factor in insurance (average $1,500–$2,000/year), fuel, maintenance, registration, and depreciation. A car loses roughly 20% of value in the first year and 15% each subsequent year. The total cost over 5 years often exceeds twice the purchase price."}],"featuresTitle":"Key Features","features":["Calculates net loan amount after down payment and trade-in deduction","Common loan terms available as quick select options","Shows total interest and total cost over the full loan period","Instant results for comparing different down payment scenarios"]}},"finance-compound-interest":{"title":"Compound Interest Calculator","description":"Calculate investment growth with compound interest and contributions","principal":"Initial Principal","annualRate":"Annual Interest Rate","years":"Time Period (Years)","compoundFrequency":"Compound Frequency","monthly":"Monthly","quarterly":"Quarterly","yearly":"Annually","daily":"Daily","monthlyContribution":"Monthly Contribution","calculateButton":"Calculate","finalAmount":"Final Amount","totalContributions":"Total Contributions","totalInterest":"Interest Earned","interestRatio":"Interest / Total","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the initial investment principal amount.","Enter the annual interest rate (e.g., 7 for 7%).","Enter the number of years for the investment.","Select how often interest compounds (daily, monthly, quarterly, or annually).","Optionally add a monthly contribution to see how regular savings grow."]},"knowledge":{"title":"About Compound Interest","items":[{"title":"The Power of Compounding","content":"Compound interest is interest earned on both principal and previously earned interest. Over long periods, this creates exponential growth. $10,000 at 7% annually grows to $19,672 in 10 years, $38,697 in 20 years, and $76,123 in 30 years — all without adding another penny of principal."},{"title":"Compound Frequency Matters","content":"More frequent compounding yields more returns. $10,000 at 6% for 10 years: annually = $17,908, monthly = $18,194, daily = $18,221. While daily vs. monthly compounding makes little difference, the difference between annual and monthly compounding is more meaningful over longer periods."},{"title":"The Rule of 72","content":"A quick way to estimate how long it takes to double your money: divide 72 by the interest rate. At 6% annual return, money doubles in approximately 72 ÷ 6 = 12 years. At 8%, it doubles in 9 years. This rule works well for rates between 6% and 10%."},{"title":"Regular Contributions Supercharge Growth","content":"Adding even small regular contributions dramatically accelerates wealth building. $10,000 initial investment at 7% for 30 years grows to $76,123. Adding just $200/month grows the total to $311,095 — more than 4 times as much. Starting early and contributing consistently is the most powerful wealth-building strategy."}],"featuresTitle":"Key Features","features":["Supports daily, monthly, quarterly, and annual compounding frequencies","Includes optional monthly contribution for regular savings plans","Shows final amount, total contributions, total interest, and interest ratio","Visual breakdown of principal vs. interest growth"]}},"finance-currency-converter":{"title":"Currency Converter","description":"Convert between 20+ major world currencies with static rates","amount":"Amount","fromCurrency":"From Currency","toCurrency":"To Currency","calculateButton":"Convert","convertedAmount":"Converted Amount","exchangeRate":"Exchange Rate","reverseRate":"Reverse Rate","disclaimer":"Disclaimer: Rates are approximate reference values and may not reflect real-time market rates. For financial transactions, please use a licensed exchange service.","lastUpdated":"Reference rates as of early 2025","result":"Enter amount above to convert","guide":{"title":"How to Use","items":["Enter the amount you want to convert.","Select the source currency from the 'From Currency' dropdown.","Select the target currency from the 'To Currency' dropdown.","Click 'Convert' to see the converted amount and exchange rate.","Note: Rates are static reference values; use a bank or exchange service for actual transactions."]},"knowledge":{"title":"About Currency Exchange","items":[{"title":"Exchange Rate Basics","content":"An exchange rate tells you how much one currency is worth in another. USD/CNY = 7.24 means 1 US Dollar buys 7.24 Chinese Yuan. Rates fluctuate constantly based on economic factors, interest rates, inflation, trade balances, and market speculation. This calculator uses fixed reference rates for illustration."},{"title":"Bid, Ask, and Spread","content":"Banks and money changers profit from the spread between buying (bid) and selling (ask) rates. If they buy USD at 7.20 CNY and sell at 7.28 CNY, the 0.08 spread is their profit. Online currency exchange services often offer better rates than airport kiosks or traditional banks. Always compare rates before exchanging large amounts."},{"title":"Major Currency Pairs","content":"The most traded currency pairs are: EUR/USD (euro/dollar), USD/JPY (dollar/yen), GBP/USD (pound/dollar), USD/CHF (dollar/franc), USD/CAD (dollar/Canadian dollar), AUD/USD (Australian dollar/dollar). These 'major pairs' have tight spreads and high liquidity. Exotic pairs (involving developing country currencies) have wider spreads and higher conversion costs."},{"title":"Factors Affecting Exchange Rates","content":"Exchange rates are influenced by: interest rate differentials (higher rates attract capital), inflation rates, economic growth, trade balance, political stability, and central bank policies. The USD is the world's reserve currency, used in most international trade and held by central banks globally. Its strength affects all other currencies."}],"featuresTitle":"Key Features","features":["Supports 20+ major world currencies including USD, EUR, GBP, JPY, CNY, and more","Shows both the exchange rate and reverse rate","Static reference rates — no API dependency, always available","Includes disclaimer about rate accuracy for financial decisions"]}},"finance-discount-calculator":{"title":"Discount Calculator","description":"Calculate discounted price, savings amount, and discount percentage","originalPrice":"Original Price","discountPercent":"Discount Percentage","discountedPrice":"Discounted Price","calculateButton":"Calculate","savings":"You Save","finalPrice":"Final Price","discountRate":"Discount Rate","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["To calculate discounted price: enter the original price and discount percentage.","To calculate discount percentage: enter the original price and discounted price.","Both directions work — enter any two values to calculate the third.","Click 'Calculate' to see the savings amount and final price.","Useful for shopping, sales pricing, and negotiation."]},"knowledge":{"title":"About Discounts","items":[{"title":"Discount Formula","content":"Discounted Price = Original Price × (1 − Discount%). Savings = Original Price × Discount%. Discount% = (Original Price − Sale Price) / Original Price × 100%. For example, a $80 item with 25% off: Sale price = $80 × 0.75 = $60. Savings = $80 × 0.25 = $20."},{"title":"Stacked Discounts","content":"Multiple discounts don't simply add up. A 20% discount followed by a 10% discount is NOT a 30% total discount. First: $100 × 0.8 = $80. Then: $80 × 0.9 = $72. Total savings = $28, or 28% — not 30%. Combined discount = 1 − (1 − 0.2)(1 − 0.1) = 1 − 0.72 = 28%."},{"title":"Discount vs. Markup","content":"Discount and markup are calculated differently. A 20% discount means selling at 80% of original price. A 20% markup means adding 20% to cost. If cost is $100 with 20% markup, price = $120. If original price is $120 with 20% discount, sale price = $96. They are not exact inverses of each other."},{"title":"Psychological Pricing","content":"Retailers use psychological pricing tactics: prices ending in .99 or .95 feel lower than round numbers. Showing the original price crossed out with a sale price creates perceived savings. '50% off' is more compelling than 'save $5' even if the absolute saving is the same. Shoppers often focus on percentage off rather than actual price."}],"featuresTitle":"Key Features","features":["Bidirectional calculation: enter any two values to find the third","Calculates discounted price, savings amount, and discount percentage","Instant results for quick shopping decisions","Works for any currency and any discount amount"]}},"finance-inflation-calculator":{"title":"Inflation Calculator","description":"Calculate purchasing power change and inflation-adjusted value","amount":"Amount","fromYear":"From Year","toYear":"To Year","inflationRate":"Annual Inflation Rate","calculateButton":"Calculate","adjustedAmount":"Inflation-Adjusted Amount","purchasingPowerChange":"Purchasing Power Change","cumulativeInflation":"Cumulative Inflation","yearsElapsed":"Years Elapsed","inYear":"in {year}","summaryText":"{amount} in {fromYear} has the same purchasing power as {adjustedAmount} in {toYear} at {rate}% annual inflation.","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the monetary amount you want to adjust for inflation.","Enter the starting year (from year).","Enter the target year (to year).","Enter the assumed annual inflation rate (default is 3%).","Click 'Calculate' to see the inflation-adjusted value and purchasing power change."]},"knowledge":{"title":"About Inflation","items":[{"title":"What is Inflation?","content":"Inflation is the rate at which the general price level of goods and services rises over time, eroding the purchasing power of money. If inflation is 3% per year, something that costs $100 today will cost $103 next year. Over 20 years at 3%, the same item costs $180.61 — an 80.6% increase."},{"title":"Inflation Formula","content":"Future Value = Present Value × (1 + inflation rate)^years. Purchasing Power Change = (Adjusted Amount / Original Amount − 1) × 100%. If $1,000 in 2000 equals $1,806 in 2020 at 3% inflation, then the purchasing power of that $1,000 decreased — you need $1,806 today to buy what $1,000 bought in 2000."},{"title":"Historical Inflation Rates","content":"US CPI inflation has averaged about 3.1% annually since 1913. China has averaged about 3–4% over the past 30 years. The 1970s saw US inflation peak at over 13%. Most central banks target 2% inflation as a healthy economic level. Hyperinflation (above 50% monthly) has occurred in Zimbabwe, Venezuela, and Weimar Germany."},{"title":"Real vs. Nominal Values","content":"Nominal values are actual dollar amounts without inflation adjustment. Real values are adjusted for inflation. A salary increase from $50,000 to $52,000 (4% nominal raise) with 5% inflation actually represents a 1% pay cut in real terms. Always use real (inflation-adjusted) values when comparing money across different time periods."}],"featuresTitle":"Key Features","features":["Calculates inflation-adjusted value for any amount and time period","Customizable inflation rate (default 3%)","Shows both the adjusted amount and percentage purchasing power change","Displays cumulative inflation percentage for the entire period"]}},"finance-irr-calculator":{"title":"IRR Calculator","description":"Calculate Internal Rate of Return for investment cash flows","initialInvestment":"Initial Investment","cashFlows":"Cash Flows","period":"Period","cashFlow":"Cash Flow","addPeriod":"Add Period","removePeriod":"Remove","calculateButton":"Calculate IRR","irr":"Internal Rate of Return (IRR)","annualReturn":"Annual Return","noSolution":"No unique IRR solution found","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the initial investment amount (the upfront cost).","Enter the expected cash inflow for each year/period.","Add more periods as needed using 'Add Period' (up to 10).","Click 'Calculate IRR' to find the internal rate of return.","Compare the IRR to your required rate of return to make the investment decision."]},"knowledge":{"title":"About IRR","items":[{"title":"What is IRR?","content":"The Internal Rate of Return (IRR) is the discount rate that makes the Net Present Value (NPV) of an investment equal to zero. It represents the effective annual return of the investment. If IRR > your required rate of return (or cost of capital), the investment is worthwhile."},{"title":"How IRR is Calculated","content":"There is no closed-form formula for IRR — it must be found iteratively. This calculator uses Newton's method: starting with an initial guess, it repeatedly improves the estimate until NPV ≈ 0. The equation is 0 = −Initial Investment + CF1/(1+r) + CF2/(1+r)² + ... + CFn/(1+r)^n, solving for r."},{"title":"IRR Decision Rule","content":"Accept an investment if IRR > required rate of return (hurdle rate). For example, if your cost of capital is 10% and the project's IRR is 15%, it's a good investment. If IRR is 8%, reject it. IRR is widely used in venture capital, private equity, and corporate capital budgeting."},{"title":"Limitations of IRR","content":"IRR assumes cash flows are reinvested at the IRR itself, which may be unrealistic for high-IRR investments. Projects with non-conventional cash flows (multiple sign changes) may have multiple IRRs or none. The Modified IRR (MIRR) addresses the reinvestment assumption. Always use IRR alongside NPV for investment analysis."}],"featuresTitle":"Key Features","features":["Newton's method iteration to find IRR with high precision","Dynamic cash flow input — add up to 10 periods","Handles both positive and negative cash flows","Displays no-solution message when convergence fails"]}},"finance-loan-calculator":{"title":"Loan Calculator","description":"Calculate monthly payments, total interest, and repayment schedule","loanAmount":"Loan Amount","interestRate":"Annual Interest Rate","loanTerm":"Loan Term","termYears":"Years","termMonths":"Months","calculateButton":"Calculate","monthlyPayment":"Monthly Payment","totalPayment":"Total Payment","totalInterest":"Total Interest","interestRatio":"Interest / Principal","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the total loan amount in the Loan Amount field.","Enter the annual interest rate (e.g., 5.5 for 5.5%).","Select whether the term is in years or months, then enter the duration.","Click 'Calculate' to see your monthly payment, total interest, and total cost.","Use results to compare different loan scenarios."]},"knowledge":{"title":"About Loan Calculation","items":[{"title":"How Monthly Payment is Calculated","content":"The standard loan payment formula is: M = P × r(1+r)^n / ((1+r)^n - 1), where P is principal, r is the monthly interest rate (annual rate / 12), and n is the number of monthly payments. This formula gives you equal (amortizing) payments over the loan term."},{"title":"Total Interest Cost","content":"Total interest = (Monthly Payment × Number of Months) − Loan Amount. For example, a $200,000 loan at 6% for 30 years has monthly payment of $1,199, total payment of $431,640, and total interest of $231,640 — more than the original loan amount."},{"title":"Effect of Interest Rate","content":"Even a 1% difference in interest rate significantly affects total cost. On a $200,000 30-year loan: 5% rate costs $186,511 in interest, while 6% costs $231,640 — a difference of $45,129. Getting a lower rate is one of the most powerful ways to reduce loan cost."},{"title":"Shorter Term vs. Longer Term","content":"A shorter loan term means higher monthly payments but dramatically less total interest. A 15-year mortgage at 6% on $200,000 has a monthly payment of $1,687 (vs. $1,199 for 30 years) but total interest of only $103,788 — saving over $127,000 compared to the 30-year option."}],"featuresTitle":"Key Features","features":["Standard amortizing loan calculation with equal monthly payments","Flexible input: loan term in years or months","Shows monthly payment, total interest, total cost, and interest-to-principal ratio","Instant calculation for quick loan scenario comparison"]}},"finance-loan-comparison":{"title":"Loan Comparison Calculator","description":"Compare two loans side by side to find the best option","loan1":"Loan Option 1","loan2":"Loan Option 2","loanAmount":"Loan Amount","interestRate":"Annual Interest Rate","loanTerm":"Loan Term","termYears":"Years","termMonths":"Months","calculateButton":"Compare Loans","comparisonResult":"Comparison Results","monthlyPayment":"Monthly Payment","totalPayment":"Total Payment","totalInterest":"Total Interest","difference":"Difference","betterOption":"Better Option","loan1Better":"Loan 1 saves","loan2Better":"Loan 2 saves","result":"Enter both loan details above to compare","guide":{"title":"How to Use","items":["Enter the loan amount, interest rate, and term for Loan Option 1.","Enter the same details for Loan Option 2.","You can compare different amounts, rates, or terms.","Click 'Compare Loans' to see the side-by-side comparison.","The calculator highlights which loan has lower total interest cost."]},"knowledge":{"title":"About Loan Comparison","items":[{"title":"When to Compare Loans","content":"Loan comparison is essential when shopping for mortgages, auto loans, or personal loans. Even a 0.5% difference in interest rate on a $200,000 mortgage saves over $20,000 over 30 years. Always compare at least 3 lenders before committing to a loan."},{"title":"Monthly Payment vs. Total Cost","content":"A lower monthly payment doesn't always mean the cheaper loan. A longer-term loan has lower monthly payments but higher total interest. Compare both metrics: a 30-year mortgage has lower monthly payments than a 15-year mortgage, but the 15-year loan is typically cheaper overall despite costing more each month."},{"title":"APR vs. Interest Rate","content":"When comparing loans from different lenders, use APR (Annual Percentage Rate) which includes fees and other costs, not just the interest rate. A loan with a lower interest rate but high origination fees may cost more than a loan with a slightly higher rate and no fees."},{"title":"Other Factors to Consider","content":"Beyond interest rate and term, consider: prepayment penalties, loan origination fees, processing fees, and the lender's reputation. Some loans penalize early payoff. Always read the fine print and calculate the true total cost including all fees."}],"featuresTitle":"Key Features","features":["Side-by-side comparison of two loan scenarios","Highlights the better option with savings amount","Compare any combination of different amounts, rates, or terms","Shows monthly payment, total payment, and total interest for each loan"]}},"finance-margin-calculator":{"title":"Profit Margin Calculator","description":"Calculate gross profit margin and markup percentage","revenue":"Revenue (Selling Price)","cost":"Cost","calculateButton":"Calculate","grossProfit":"Gross Profit","grossMargin":"Gross Margin","markup":"Markup","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the selling price (revenue) in the Revenue field.","Enter the cost of the product or service.","Click 'Calculate' to see gross profit, margin percentage, and markup percentage.","Margin and markup are related but calculated differently.","Use this for pricing products to ensure adequate profit margin."]},"knowledge":{"title":"About Profit Margin","items":[{"title":"Gross Margin Formula","content":"Gross Margin = (Revenue − Cost) / Revenue × 100%. For example, if you sell a product for $100 and it cost $60 to produce, Gross Profit = $40, Gross Margin = 40/100 = 40%. Gross margin measures profit as a percentage of revenue and is a key indicator of business profitability."},{"title":"Margin vs. Markup","content":"Margin and markup are often confused. Margin = (Revenue − Cost) / Revenue. Markup = (Revenue − Cost) / Cost. For the same numbers: $100 revenue, $60 cost — Margin = 40%, Markup = 66.7%. Margin is always less than markup for the same transaction. Confusing them in pricing can be costly."},{"title":"Industry Margin Benchmarks","content":"Gross margin varies significantly by industry: Software/SaaS (60–80%), Retail fashion (45–65%), Grocery (20–25%), Restaurant food (65–70% on food, but net margin 3–9%), Auto dealer (2–5%), Professional services (50–70%), Manufacturing (25–40%). Net margin (after all expenses) is always much lower than gross margin."},{"title":"Why Margin Matters","content":"Gross margin must cover all other business expenses: rent, salaries, marketing, utilities, and provide net profit. A business with 20% gross margin needs expenses below 20% of revenue to be profitable. Higher margins provide more buffer and allow for pricing flexibility. Businesses should track margins carefully and compare to industry benchmarks."}],"featuresTitle":"Key Features","features":["Calculates gross profit in dollar amount","Shows both gross margin % and markup % simultaneously","Clear explanation of the difference between margin and markup","Ideal for pricing decisions and profitability analysis"]}},"finance-markup-calculator":{"title":"Markup Calculator","description":"Calculate selling price from cost and desired markup percentage","cost":"Cost","markupPercent":"Markup Percentage","sellingPrice":"Selling Price","calculateButton":"Calculate","profit":"Profit","markup":"Markup","margin":"Profit Margin","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the cost of the product or service.","Enter your desired markup percentage.","Click 'Calculate' to see the selling price, profit, and resulting margin.","Alternatively, enter cost and selling price to calculate the markup percentage.","Use this tool to set pricing that meets your profitability goals."]},"knowledge":{"title":"About Markup","items":[{"title":"Markup Formula","content":"Selling Price = Cost × (1 + Markup%). Profit = Selling Price − Cost. For example, a product costing $50 with a 60% markup: Selling Price = $50 × 1.6 = $80. Profit = $80 − $50 = $30. Note that the markup (60%) is based on cost, while the resulting margin (37.5%) is based on selling price."},{"title":"Converting Markup to Margin","content":"Margin = Markup / (1 + Markup). Markup = Margin / (1 − Margin). A 50% markup = 33.3% margin. A 100% markup = 50% margin. A 200% markup = 66.7% margin. This is why retailers need to know which metric they're discussing — a 50% markup is not the same as a 50% margin."},{"title":"Typical Markup by Industry","content":"Standard markup percentages by industry: Jewelry (50–200%), Clothing retail (50–100%), Electronics (10–30%), Auto parts (30–50%), Restaurant food (300–500% on raw ingredients), Books (40–50%), Furniture (200–400%). Higher-markup industries typically have lower sales volume or require significant overhead."},{"title":"Setting the Right Markup","content":"Your markup must cover not just profit but also: marketing costs, overhead (rent, utilities, staff), returns and damaged goods, and cost of capital. A simple rule: if your gross margin covers all overhead costs with profit left over, your markup is adequate. Always test prices against market rates — too high loses sales, too low leaves money on the table."}],"featuresTitle":"Key Features","features":["Calculates selling price from cost and markup percentage","Shows the equivalent profit margin alongside markup percentage","Bidirectional: enter cost and selling price to find markup","Helps set pricing strategy for retail, wholesale, and service businesses"]}},"finance-mortgage-calculator":{"title":"Mortgage Calculator","description":"Calculate mortgage payments including property tax and insurance","homePrice":"Home Price","downPayment":"Down Payment","downPaymentPercent":"Down Payment %","loanAmount":"Loan Amount","interestRate":"Annual Interest Rate","loanTerm":"Loan Term (years)","propertyTax":"Annual Property Tax Rate","insurance":"Monthly Home Insurance","calculateButton":"Calculate","monthlyMortgage":"Monthly Mortgage (P+I)","monthlyPropertyTax":"Monthly Property Tax","monthlyInsurance":"Monthly Insurance","monthlyTotal":"Total Monthly Payment","totalCost":"Total Cost (30 yrs)","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the home purchase price.","Enter your down payment as a dollar amount or percentage.","Enter the interest rate, loan term (typically 15 or 30 years).","Optionally enter annual property tax rate and monthly insurance cost.","Click 'Calculate' to see your complete monthly payment breakdown."]},"knowledge":{"title":"About Mortgage Calculation","items":[{"title":"What is a Mortgage?","content":"A mortgage is a loan used to purchase real estate. The property itself serves as collateral. Monthly payments consist of principal (reducing your loan balance) and interest (cost of borrowing). Typical terms are 15 or 30 years, with fixed or adjustable interest rates."},{"title":"Down Payment Impact","content":"A larger down payment reduces your loan amount and monthly payments. Putting down 20% or more typically allows you to avoid Private Mortgage Insurance (PMI). A 10% down payment on a $400,000 home means borrowing $360,000 vs $320,000 with a 20% down payment."},{"title":"Total Cost of Homeownership","content":"Beyond principal and interest, homeowners pay property taxes (typically 0.5%–2.5% of home value annually), homeowner's insurance ($100–$200/month), and possibly HOA fees and maintenance. These can add $500–$1,500+ per month to your housing costs."},{"title":"Fixed vs. Adjustable Rate","content":"A fixed-rate mortgage keeps the same interest rate for the entire loan term, providing predictable payments. An adjustable-rate mortgage (ARM) starts with a lower rate that changes periodically. Fixed rates offer stability; ARMs may be beneficial if rates drop or you plan to sell within a few years."}],"featuresTitle":"Key Features","features":["Calculates principal and interest payment with standard amortization formula","Includes property tax and insurance for total monthly cost","Shows loan amount automatically based on home price minus down payment","Supports percentage or dollar amount down payment input"]}},"finance-npv-calculator":{"title":"NPV Calculator","description":"Calculate Net Present Value to evaluate investment profitability","discountRate":"Discount Rate (Annual %)","initialInvestment":"Initial Investment","cashFlows":"Cash Flows","period":"Period","cashFlow":"Cash Flow","addPeriod":"Add Period","removePeriod":"Remove","calculateButton":"Calculate NPV","npv":"Net Present Value (NPV)","decision":"Decision","positiveNpv":"Accept — Positive NPV indicates value creation","negativeNpv":"Reject — Negative NPV indicates value destruction","zeroNpv":"Borderline — NPV is approximately zero","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the discount rate (required rate of return or cost of capital).","Enter the initial investment as a positive number (it will be treated as an outflow).","Enter the expected cash inflow for each period (year).","Add more periods using the 'Add Period' button (up to 10 periods).","Click 'Calculate NPV' to get the Net Present Value and investment recommendation."]},"knowledge":{"title":"About NPV","items":[{"title":"NPV Formula","content":"NPV = Σ [CFt / (1 + r)^t] − Initial Investment, where CFt is cash flow in period t, r is the discount rate, and t is the period number. A positive NPV means the investment creates value (returns exceed the cost of capital). A negative NPV means the investment destroys value."},{"title":"Choosing the Discount Rate","content":"The discount rate represents your required rate of return or the cost of capital. For personal investments, use your opportunity cost (e.g., 7–10% if you expect the stock market to return that). For business projects, use the weighted average cost of capital (WACC). Higher discount rates make future cash flows worth less today."},{"title":"NPV Decision Rule","content":"If NPV > 0: accept the investment (it creates wealth). If NPV < 0: reject it (it destroys wealth). If NPV = 0: the investment exactly meets the required return. When comparing multiple mutually exclusive projects, choose the one with the highest positive NPV. NPV is considered the most theoretically sound investment evaluation method."},{"title":"NPV vs. IRR","content":"NPV and IRR are related but different. NPV gives the dollar value created; IRR gives the rate of return. They usually agree on accept/reject decisions, but can conflict when comparing projects of different scale or timing. NPV is preferred for capital allocation decisions; IRR is useful for communicating returns as a percentage."}],"featuresTitle":"Key Features","features":["Dynamic cash flow rows — add up to 10 periods","Calculates NPV with precise discounting formula","Provides accept/reject decision based on NPV sign","Useful for project evaluation, real estate, and business investment decisions"]}},"finance-prepayment":{"title":"Early Repayment Calculator","description":"Calculate interest savings from extra payments or lump sum payoff","loanAmount":"Original Loan Amount","interestRate":"Annual Interest Rate","loanTerm":"Loan Term (months)","currentMonth":"Current Month Number","extraMonthly":"Extra Monthly Payment","lumpSum":"Lump Sum Payment","calculateButton":"Calculate Savings","originalPayoff":"Original Payoff","newPayoff":"New Payoff","monthsSaved":"Months Saved","interestSaved":"Interest Saved","originalTotalInterest":"Original Total Interest","newTotalInterest":"New Total Interest","result":"Enter values above to calculate savings","guide":{"title":"How to Use","items":["Enter your original loan amount, interest rate, and total term in months.","Enter your current month number (e.g., 12 if you are 1 year in).","Enter an extra monthly payment amount, a one-time lump sum, or both.","Click 'Calculate Savings' to see how much interest you save.","Compare the original payoff date with the new accelerated payoff date."]},"knowledge":{"title":"About Prepayment","items":[{"title":"Power of Extra Payments","content":"Making extra payments on a mortgage or loan can save enormous amounts of interest. On a $300,000 30-year mortgage at 6%, adding $200/month extra reduces the loan to about 24 years and saves approximately $70,000 in interest. The savings compound because every extra dollar paid reduces future interest charges."},{"title":"Extra Monthly vs. Lump Sum","content":"Both strategies work, but extra monthly payments provide consistent, steady savings. A lump sum payment is best when you receive a bonus or windfall. Any principal payment directly reduces the balance, which reduces all future interest. The earlier in the loan you make extra payments, the greater the savings."},{"title":"Check for Prepayment Penalties","content":"Before making extra payments, verify your loan has no prepayment penalties. Some loans charge a fee (typically 1–3% of the prepaid amount) if you pay off early or make large extra payments. Most mortgages originated in recent years do not have prepayment penalties, but older loans and some auto loans may."},{"title":"Specify Principal-Only Payments","content":"When making extra payments, always designate them as 'principal only.' Some lenders apply extra money to future payments instead of reducing the current balance, which does not save as much interest. Confirm with your lender how to properly submit principal-only payments."}],"featuresTitle":"Key Features","features":["Calculates interest saved from extra monthly payments and/or lump sum","Shows new payoff date and months saved compared to original schedule","Handles mid-loan scenarios by specifying current month","Supports combining both extra monthly payments and lump sum payment"]}},"finance-retirement-calculator":{"title":"Retirement Calculator","description":"Plan your retirement savings and estimate monthly income","currentAge":"Current Age","retirementAge":"Retirement Age","currentSavings":"Current Retirement Savings","monthlyContribution":"Monthly Contribution","expectedReturn":"Expected Annual Return","inflationRate":"Annual Inflation Rate","monthlyIncomeNeeded":"Monthly Income Needed in Retirement","calculateButton":"Calculate","yearsToRetirement":"Years to Retirement","projectedSavings":"Projected Savings at Retirement","requiredSavings":"Required Savings for 25 Years","monthlyIncomeAvailable":"Monthly Income Available","surplus":"Surplus / Shortfall","yearsOfIncome":"Years of Income Supported","lifeExpectancy":"Life Expectancy","onTrack":"On Track","needsAttention":"Needs Attention","inflationNote":"Inflation-adjusted income needed at retirement","estimatedLabel":"Estimated","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter your current age and desired retirement age.","Enter your current retirement savings and monthly contribution.","Enter expected annual return rate (7% is a common estimate for diversified portfolio).","Enter expected inflation rate and monthly income needed during retirement.","Click 'Calculate' to see if you're on track for retirement."]},"knowledge":{"title":"About Retirement Planning","items":[{"title":"The 4% Rule","content":"A common retirement guideline is the 4% rule: withdraw 4% of your savings per year. To support $3,000/month ($36,000/year) in retirement, you need $36,000 ÷ 0.04 = $900,000. This rule assumes a 30-year retirement with a diversified portfolio of stocks and bonds, historically surviving about 95% of scenarios."},{"title":"How Projections Work","content":"Projected savings uses compound interest with monthly contributions: each month, the existing balance earns (return rate / 12), then the monthly contribution is added. This compounds over the years to retirement. The required savings is based on the present value of an annuity — how much is needed to fund your monthly withdrawals."},{"title":"Inflation in Retirement","content":"A $3,000/month need today will require more in the future due to inflation. At 3% inflation, you'll need $4,000/month in 10 years and $5,418/month in 20 years to maintain the same purchasing power. This calculator uses today's dollars — you should plan for inflation by either adjusting contributions upward or assuming higher returns."},{"title":"Retirement Savings Tips","content":"Start as early as possible — compound interest is most powerful over long periods. Maximize tax-advantaged accounts (401k, IRA in the US; pension accounts in China). Increase contributions when income rises. Consider Social Security or pension income in your planning. Regularly rebalance your portfolio and reduce risk as retirement approaches."}],"featuresTitle":"Key Features","features":["Projects retirement savings using compound interest with monthly contributions","Calculates required savings based on monthly income need and 4% withdrawal rule","Shows surplus or shortfall against retirement goal","Estimates years of income the projected savings will support"]}},"finance-roi-calculator":{"title":"ROI Calculator","description":"Calculate return on investment and annualized ROI percentage","initialInvestment":"Initial Investment","finalValue":"Final Value","investmentYears":"Investment Period (Years)","calculateButton":"Calculate","roi":"ROI","annualizedRoi":"Annualized ROI","netProfit":"Net Profit / Loss","profitLoss":"Profit / Loss","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the initial amount invested.","Enter the current or final value of the investment.","Optionally enter the number of years for annualized ROI calculation.","Click 'Calculate' to see ROI percentage and net profit.","Negative ROI indicates a loss; positive ROI indicates a gain."]},"knowledge":{"title":"About ROI","items":[{"title":"ROI Formula","content":"ROI (Return on Investment) = (Final Value − Initial Investment) / Initial Investment × 100%. A $10,000 investment that grows to $15,000 has an ROI of (15,000 − 10,000) / 10,000 × 100% = 50%. ROI measures profitability relative to the investment cost."},{"title":"Annualized ROI","content":"Simple ROI doesn't account for time. Annualized ROI = (1 + ROI)^(1/years) − 1. A 50% ROI over 5 years = (1.5)^(1/5) − 1 = 8.45% annualized. This allows fair comparison of investments with different time horizons. Stock market historical average is about 10% annualized, or 7% after inflation."},{"title":"ROI Benchmarks","content":"ROI varies widely by asset class: savings accounts (0.5–2%), bonds (3–5%), real estate (6–12%), stocks/index funds (7–10% long-term average), private equity (15–25%). Higher potential returns generally come with higher risk. Always compare ROI against relevant benchmarks."},{"title":"Limitations of ROI","content":"ROI has limitations: it ignores risk and volatility, doesn't account for taxes, and doesn't consider the time value of money as precisely as NPV or IRR. It also doesn't factor in opportunity cost. Use ROI alongside other metrics like Sharpe ratio, NPV, and IRR for comprehensive investment analysis."}],"featuresTitle":"Key Features","features":["Calculates total ROI percentage from initial and final values","Annualized ROI calculation for comparing investments over different time periods","Shows net profit or loss in dollar amount","Works for any type of investment including stocks, real estate, or business"]}},"finance-salary-calculator":{"title":"Salary Calculator","description":"Convert salary between hourly, daily, weekly, monthly, and annual","salaryAmount":"Salary Amount","payPeriod":"Pay Period","hoursPerWeek":"Hours per Week","daysPerWeek":"Days per Week","hourly":"Hourly","daily":"Daily","weekly":"Weekly","biweekly":"Bi-Weekly","monthly":"Monthly","annual":"Annual (Yearly)","calculateButton":"Convert","results":"Salary Breakdown","result":"Enter salary above to convert","guide":{"title":"How to Use","items":["Enter your salary amount and select the pay period it represents.","Enter your hours per week (default 40) and days per week (default 5).","Click 'Convert' to see the equivalent salary for all pay periods.","Use this to compare job offers with different pay structures.","Useful for calculating hourly rate from annual salary and vice versa."]},"knowledge":{"title":"About Salary Conversion","items":[{"title":"How Conversion Works","content":"All conversions go through the annual salary. Hourly to annual = hourly rate × hours per week × 52 weeks. Annual to hourly = annual salary ÷ 52 ÷ hours per week. Bi-weekly = annual ÷ 26 pay periods. Monthly = annual ÷ 12. Daily = annual ÷ (weeks per year × days per week)."},{"title":"Gross vs. Net Salary","content":"This calculator shows gross salary (before taxes). Your net take-home pay will be less after federal and state income taxes, Social Security (6.2%), Medicare (1.45%), and any benefit deductions. A $60,000 gross salary typically results in $45,000–$50,000 net depending on your tax situation."},{"title":"Bi-Weekly vs. Semi-Monthly","content":"Bi-weekly means paid every two weeks (26 paychecks/year). Semi-monthly means paid twice a month (24 paychecks/year). They're often confused. With bi-weekly pay, two months per year have 3 paychecks. Semi-monthly pay is exactly half the monthly salary each time."},{"title":"Overtime Calculation","content":"Under US federal law, non-exempt employees earn 1.5× their hourly rate for hours over 40 per week. If your hourly rate is $20, overtime is $30/hour. Some states have additional rules. Converting salary to hourly helps evaluate whether overtime opportunities increase effective compensation."}],"featuresTitle":"Key Features","features":["Converts between all common pay periods: hourly, daily, weekly, bi-weekly, monthly, annual","Customizable hours per week and days per week for accurate daily/hourly rates","Clear table showing all equivalent amounts at once","Ideal for comparing job offers or calculating contractor rates"]}},"finance-savings-goal":{"title":"Savings Goal Calculator","description":"Calculate time needed to reach your savings goal","savingsGoal":"Savings Goal","currentSavings":"Current Savings","monthlyContribution":"Monthly Contribution","annualRate":"Annual Interest Rate","calculateButton":"Calculate","monthsToGoal":"Months to Goal","yearsToGoal":"Years to Goal","targetDate":"Estimated Target Date","totalContributions":"Total Contributions","interestEarned":"Interest Earned","alreadyReached":"Already reached!","complete":"complete","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter your savings goal amount.","Enter how much you already have saved.","Enter how much you can save each month.","Enter the expected annual interest rate on your savings.","Click 'Calculate' to see when you'll reach your goal and how much interest you'll earn."]},"knowledge":{"title":"About Savings Goals","items":[{"title":"How the Calculation Works","content":"Each month, the current balance earns (annual rate ÷ 12) in interest, then the monthly contribution is added. This continues until the balance reaches the goal. The formula for time without interest: months = (Goal − Current) ÷ Monthly Contribution. With interest, it takes fewer months due to compound growth."},{"title":"Effect of Interest Rate","content":"Interest rate significantly impacts time to goal. To save $50,000 starting from $5,000 with $500/month: at 0% interest = 90 months (7.5 years); at 3% = 81 months (6.75 years); at 5% = 75 months (6.25 years). Higher rates help more for longer savings periods and larger goals."},{"title":"SMART Savings Goals","content":"Effective savings goals are SMART: Specific (save $20,000 for a car), Measurable (track monthly), Achievable (based on income), Relevant (aligns with priorities), Time-bound (within 3 years). Having a specific target date motivates consistent saving and helps you evaluate whether your monthly contribution is sufficient."},{"title":"High-Yield Savings Strategies","content":"Maximize interest earned by using: high-yield savings accounts (typically 4–5% in 2024), money market accounts, short-term CDs, or Treasury bills. Automate your savings so the monthly contribution happens automatically. Consider increasing contributions whenever income rises to reach goals faster."}],"featuresTitle":"Key Features","features":["Calculates time to reach savings goal with compound interest","Shows estimated target date in calendar form","Displays total contributions and interest earned breakdown","Works for any savings goal — emergency fund, vacation, down payment, etc."]}},"finance-simple-interest":{"title":"Simple Interest Calculator","description":"Calculate simple interest earned on a principal amount","principal":"Principal Amount","annualRate":"Annual Interest Rate","timePeriod":"Time Period","timeUnit":"Time Unit","years":"Years","months":"Months","days":"Days","calculateButton":"Calculate","interestEarned":"Interest Earned","finalAmount":"Final Amount","dailyInterest":"Daily Interest","monthlyInterest":"Monthly Interest","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the principal (starting) amount.","Enter the annual interest rate percentage.","Enter the time period and select the unit (years, months, or days).","Click 'Calculate' to see interest earned and final amount.","Use this for short-term savings, bonds, or simple loan interest estimates."]},"knowledge":{"title":"About Simple Interest","items":[{"title":"Simple Interest Formula","content":"Simple interest is calculated as: I = P × r × t, where P is the principal, r is the annual interest rate (as a decimal), and t is time in years. The final amount A = P + I. For example, $5,000 at 4% per year for 3 years: I = 5000 × 0.04 × 3 = $600, so A = $5,600."},{"title":"Simple vs. Compound Interest","content":"With simple interest, you earn interest only on the original principal. With compound interest, you also earn interest on accumulated interest. For short periods, the difference is small. Over 10 years: $10,000 at 5% simple interest earns $5,000; compound interest (monthly) earns $6,470 — a 29.4% difference."},{"title":"When Simple Interest is Used","content":"Simple interest is used for: short-term personal loans, auto loans, some bonds, savings accounts in some countries, and payday loans. Most mortgages and investment accounts use compound interest. Government Treasury bills and notes use simple interest for their discount calculation."},{"title":"Converting Time Periods","content":"The formula requires time in years. To convert: months to years = months ÷ 12; days to years = days ÷ 365. For 6 months at 5%: I = P × 0.05 × (6/12) = P × 0.025. For 90 days at 5%: I = P × 0.05 × (90/365) = P × 0.01233."}],"featuresTitle":"Key Features","features":["Simple interest calculation using I = P × r × t formula","Supports years, months, and days as time units","Shows interest earned, final amount, daily interest, and monthly interest","Instant calculation for quick interest estimates"]}},"finance-social-security":{"title":"Five Insurance One Fund Calculator","description":"Calculate Chinese social insurance and housing fund contributions","monthlySalary":"Monthly Salary","city":"City","beijing":"Beijing","shanghai":"Shanghai","guangzhou":"Guangzhou","general":"General / Other","calculateButton":"Calculate","employeeContributions":"Employee Deductions","employerContributions":"Employer Contributions","pension":"Pension Insurance","medical":"Medical Insurance","unemployment":"Unemployment Insurance","workInjury":"Work Injury Insurance","maternity":"Maternity Insurance","housingFund":"Housing Provident Fund","totalEmployee":"Total Employee Deduction","totalEmployer":"Total Employer Cost","totalCost":"Total Labor Cost","netSalary":"Net Salary (after deductions)","result":"Enter salary above to calculate","guide":{"title":"How to Use","items":["Enter your monthly salary.","Select your city from the dropdown (rates vary by city).","Click 'Calculate' to see both employee and employer contribution breakdowns.","Employee deductions are subtracted from your gross salary.","Employer contributions are additional costs paid by the company on top of your salary."]},"knowledge":{"title":"About Five Insurance One Fund","items":[{"title":"What is 五险一金?","content":"Five Insurance One Fund (五险一金) is China's mandatory social security system. The five insurances are: pension (养老保险), medical (医疗保险), unemployment (失业保险), work injury (工伤保险), and maternity (生育保险). The one fund is the housing provident fund (住房公积金). Both employees and employers contribute."},{"title":"Employee Contribution Rates","content":"Typical employee rates: Pension 8%, Medical 2% + 3 CNY/month, Unemployment 0.5%, Work Injury 0% (employer only), Maternity 0% (employer only), Housing Fund 5–12% (individual choice). Total employee deduction is typically around 10.5–22.5% of salary depending on housing fund selection."},{"title":"Employer Contribution Rates","content":"Typical employer rates: Pension 16%, Medical 10%, Unemployment 0.5%, Work Injury 0.2–1.9% (industry dependent), Maternity 0.8%, Housing Fund 5–12%. Total employer cost is typically around 33–43% on top of the employee's salary. This is why the total cost to hire an employee is much higher than their net salary."},{"title":"City Differences","content":"Contribution rates and caps vary significantly by city. Beijing and Shanghai have higher salary caps for social insurance contributions. The minimum and maximum contribution bases also differ. Some cities have reduced rates for small businesses. Rates are reviewed and updated regularly by local governments."}],"featuresTitle":"Key Features","features":["Detailed breakdown for all five insurance types plus housing fund","Shows both employee and employer contribution amounts","Supports Beijing, Shanghai, Guangzhou, and general rates","Calculates net salary after employee deductions and total employer labor cost"]}},"finance-split-bill":{"title":"Bill Splitter","description":"Split a restaurant bill equally among multiple people with tip","billAmount":"Total Bill Amount","tipPercent":"Tip Percentage","numberOfPeople":"Number of People","calculateButton":"Split Bill","subtotal":"Subtotal","tipAmount":"Tip Amount","totalAmount":"Total Amount","perPerson":"Per Person","result":"Enter values above to split the bill","guide":{"title":"How to Use","items":["Enter the total bill amount (before tip).","Enter the tip percentage you'd like to leave.","Enter the number of people splitting the bill.","Click 'Split Bill' to see how much each person owes.","Round up slightly to account for rounding differences."]},"knowledge":{"title":"About Bill Splitting","items":[{"title":"Equal Split Method","content":"The equal split is the simplest method: everyone pays the same amount regardless of what they ordered. Total with tip ÷ number of people. This works well for groups of friends with similar orders. It can feel unfair when there's a big price difference in what people ordered."},{"title":"Itemized vs. Equal Split","content":"For fairer splitting, itemize: each person pays for their own items plus a proportional share of tax and tip. This is more complex but equitable. Some restaurants will print separate checks on request. Many payment apps now support itemized bill splitting with photo recognition."},{"title":"Handling Rounding","content":"When dividing bills, rounding creates small discrepancies. If each person's share is $23.33, collecting $23.34 from some and $23.32 from others adds up to the exact total. A practical solution: one person covers the rounding difference, or use digital transfers for exact amounts."},{"title":"Digital Payment Options","content":"Digital payment apps make splitting easy: WeChat Pay and Alipay in China, Venmo and PayPal in the US, Monzo and Revolut in Europe. One person pays the bill and others transfer their share. QR code payment splitting features let everyone pay their portion directly. Always confirm the total before splitting to avoid disputes."}],"featuresTitle":"Key Features","features":["Calculates equal split including tip for any group size","Shows subtotal, tip amount, total, and per-person breakdown","Supports custom tip percentages","Instant calculation for any number of people"]}},"finance-tax-calculator":{"title":"Chinese Income Tax Calculator","description":"Calculate Chinese individual income tax with deductions","monthlyGross":"Monthly Gross Salary","socialInsurance":"Social Insurance Deduction","specialDeductions":"Special Additional Deductions","childEducation":"Child Education","mortgageInterest":"Mortgage Interest","rentingHousing":"Renting Housing","elderlySupport":"Elderly Support","continuingEducation":"Continuing Education","criticalIllness":"Critical Illness","calculateButton":"Calculate Tax","grossSalary":"Gross Salary","exemption":"Standard Exemption (5000)","taxableIncome":"Taxable Income","incomeTax":"Income Tax","netSalary":"Net Salary","effectiveRate":"Effective Tax Rate","taxBracket":"Tax Bracket","result":"Enter salary above to calculate","guide":{"title":"How to Use","items":["Enter your monthly gross salary.","Enter your total social insurance deduction (五险一金) per month.","Enter any applicable special additional deductions (专项附加扣除).","Click 'Calculate Tax' to see your tax breakdown.","Results show taxable income, tax amount, net salary, and effective rate."]},"knowledge":{"title":"About Chinese Income Tax","items":[{"title":"Tax Calculation Method","content":"Monthly taxable income = Gross salary − 5,000 (basic exemption) − Social insurance deductions − Special additional deductions. Tax = Taxable income × Rate − Quick deduction. The 2019 reform increased the basic exemption from 3,500 to 5,000 CNY and added new special deductions for families."},{"title":"2024 Tax Brackets","content":"Monthly taxable income brackets: ≤3,000 (3%), 3,001–12,000 (10%, QD=210), 12,001–25,000 (20%, QD=1,410), 25,001–35,000 (25%, QD=2,660), 35,001–55,000 (30%, QD=4,410), 55,001–80,000 (35%, QD=7,160), >80,000 (45%, QD=15,160). QD = quick deduction."},{"title":"Special Additional Deductions","content":"China allows several special deductions: Child education (1,000/child/month), continuing education (400/month for academic, 3,600/year for skills), mortgage interest (1,000/month), renting housing (800–1,500/month depending on city), elderly support (up to 2,000/month), critical illness medical expenses (actual, up to 80,000/year)."},{"title":"Annual Settlement","content":"Monthly withholding is an estimate. At year-end, an annual settlement reconciles actual income, deductions, and tax paid. You may get a refund if too much was withheld, or pay more if too little was withheld. The annual settlement can be filed via the 个人所得税 (Personal Income Tax) app."}],"featuresTitle":"Key Features","features":["2024 China individual income tax calculation with all brackets","Includes standard 5,000 CNY monthly exemption","Supports social insurance deduction and all 6 special additional deductions","Shows taxable income, tax amount, net salary, and effective rate"]}},"finance-tip-calculator":{"title":"Tip Calculator","description":"Calculate tip amount and split the bill among multiple people","billAmount":"Bill Amount","tipPercent":"Tip Percentage","numberOfPeople":"Number of People","calculateButton":"Calculate","tipAmount":"Tip Amount","totalBill":"Total Bill","perPerson":"Per Person","tipPerPerson":"Tip Per Person","totalPerPerson":"Total Per Person","quickTips":"Quick Tip Options","result":"Enter values above to calculate","guide":{"title":"How to Use","items":["Enter the pre-tip bill amount.","Enter or select a tip percentage (15%, 18%, 20%, or 25% are common).","Enter the number of people splitting the bill.","Click 'Calculate' to see tip amount, total, and amount per person.","Use quick tip buttons to instantly calculate common tip percentages."]},"knowledge":{"title":"About Tipping","items":[{"title":"Standard Tip Percentages","content":"In the US, standard restaurant tip is 15–20% of the pre-tax bill for good service, with 20–25% for excellent service. For poor service, 10–15% is acceptable. Coffee shops and fast casual: $1–2 or 10–15%. Taxi/rideshare: 15–20%. Hotel housekeeping: $2–5/night. Hair stylist: 15–20%."},{"title":"Tip on Pre-Tax or Post-Tax?","content":"Tipping etiquette varies — both are acceptable. Some prefer tipping on the pre-tax amount (the actual service cost), while others tip on the total including tax. The difference is small: on a $100 bill with 10% tax, tipping 20% on pre-tax = $20, post-tax = $22. We calculate on the pre-tax bill amount you enter."},{"title":"Tipping Culture by Country","content":"Tipping customs vary greatly worldwide. In the US and Canada, tipping is expected and often essential to service workers' income. In Japan, tipping can be considered rude. In Europe, rounding up or leaving small change is common. In China, tipping is uncommon at most restaurants. Always research local customs when traveling."},{"title":"Bill Splitting Etiquette","content":"For equal splits, everyone pays the same regardless of what they ordered. For itemized splits, each person pays for their own items. Some restaurants can split bills between cards. Digital payment apps (Venmo, PayPal, WeChat Pay, Alipay) make after-dinner splits easy — one person pays and others transfer."}],"featuresTitle":"Key Features","features":["Quick tip percentage buttons for 15%, 18%, 20%, and 25%","Bill splitting for any number of people","Shows tip amount, total bill, and per-person breakdown","Instant calculation as you change values"]}},"finance-year-end-bonus":{"title":"Year-End Bonus Tax Calculator","description":"Calculate tax on Chinese year-end bonus using the annual bonus method","bonusAmount":"Year-End Bonus Amount","monthlySalary":"Monthly Salary (this month)","calculateButton":"Calculate Tax","taxableBonus":"Taxable Bonus","incomeTax":"Income Tax","afterTaxBonus":"After-Tax Bonus","effectiveRate":"Effective Rate","taxBracket":"Applicable Bracket","method":"Calculation Method: Annual Bonus Preferential Method","result":"Enter bonus amount above to calculate","guide":{"title":"How to Use","items":["Enter the total year-end bonus amount before tax.","Enter your monthly salary for the month you receive the bonus.","Click 'Calculate Tax' to see the tax amount and after-tax bonus.","The calculator uses China's preferential annual bonus tax method.","Note: This method can only be used once per year."]},"knowledge":{"title":"About Year-End Bonus Tax","items":[{"title":"Annual Bonus Preferential Method","content":"China allows a special preferential tax method for year-end bonuses (全年一次性奖金). Instead of adding the bonus to that month's income, you divide the bonus by 12, find the applicable tax bracket, then apply that rate to the entire bonus. This often results in less tax than adding it to regular income."},{"title":"When Monthly Salary is Below 5,000","content":"If your monthly salary is below 5,000 CNY, the deficit is deducted from the bonus first. For example, if salary is 4,000 CNY (1,000 below the 5,000 threshold), the taxable bonus = Year-end bonus − 1,000. The remaining amount is then divided by 12 to find the applicable bracket."},{"title":"Bracket Trap Warning","content":"Be aware of bracket traps with year-end bonuses. Due to the tax calculation method, receiving a slightly higher bonus can result in significantly less after-tax income if it crosses a bracket threshold. For example, a 36,000 bonus is taxed at 3%, but 36,001 is taxed at 10% — the extra 1 yuan costs hundreds in tax."},{"title":"One-Time Use Per Year","content":"The preferential annual bonus tax method can only be used once per tax year. If you receive multiple bonuses, only one can use this method; others must be added to monthly income. Starting from 2022, taxpayers can choose to have the bonus included in comprehensive income instead, which may be better depending on your total annual income."}],"featuresTitle":"Key Features","features":["Uses China's preferential annual bonus tax calculation method","Handles case where monthly salary is below 5,000 CNY exemption threshold","Shows tax amount, after-tax bonus, effective rate, and applicable bracket","Warns about bracket trap scenarios"]}},"fletcher":{"title":"Fletcher Checksum Calculator","inputFormat":"Input Format","version":"Fletcher Version","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate Fletcher checksum..."},"results":{"hex":"Fletcher Result (Hex)","dec":"Fletcher Result (Dec)","oct":"Fletcher Result (Oct)","bin":"Fletcher Result (Bin)"},"knowledge":{"title":"Fletcher Checksum Knowledge","description":"Fletcher checksum is an error detection algorithm that generates a position-dependent checksum. It is the predecessor of Adler32 and provides better error detection than simple checksums.","features":{"title":"Features","items":["Two versions: Fletcher-16 and Fletcher-32","Better error detection than simple checksums","Position-dependent checksum","Predecessor of Adler32 algorithm","Efficient implementation possible"]},"applications":{"title":"Applications","items":["Network protocols","Data integrity verification","File transfer protocols","Digital communication systems","Real-time data verification"]},"security":{"title":"Security Recommendations","items":["Not suitable for cryptographic purposes","Consider using CRC for better error detection","Use Fletcher-32 for better reliability","Combine with other methods for critical data"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"footer":{"disclaimer":"The tools on this site are strictly prohibited for illegal purposes. We do not bear any losses and responsibilities caused by using the tools.","about":"About Us","terms":"Terms","privacy":"Privacy","cookie":"Cookie Policy","feedback":"Feedback","contact":"Contact Us","disclaimer_page":"Disclaimer","sitemap":"Sitemap","help":"Help Center","faq":"FAQ","friendLinks":"Friend Links","links":[{"name":"Modbus Online Tool","url":"https://modbuskit.com/en"}],"siteName":"calctools.online","icp":"ICP License: 粤ICP备2024343607号-1","copyright":"© 2025 calctools.online All Rights Reserved","publicSecurity":"Public Security Record: 粤公网安备44011202003008号"},"fractionCalculator":{"title":"Fraction Calculator","description":"Add, subtract, multiply, and divide fractions. Convert fractions to decimals and percentages.","keywords":"fraction calculator, add fractions, simplify fractions, decimal to fraction","category":"Math","numerator":"Numerator","denominator":"Denominator","calculate":"Calculate","result":"Result","clear":"Clear","simplify":"Simplify","decimal":"Decimal","percentage":"Percentage","mixedNumber":"Mixed Number","guide":{"title":"How to use","items":["Enter the numerator and denominator for the first fraction.","Select an operation (+, -, *, /).","Enter the numerator and denominator for the second fraction.","Click Calculate."]},"knowledge":{"title":"About Fractions","introduction":"A fraction represents a part of a whole or, more generally, any number of equal parts.","items":[{"title":"Types of Fractions","content":"Proper Fraction: Numerator < Denominator\nImproper Fraction: Numerator >= Denominator\nMixed Number: Whole number + Proper Fraction"}],"featuresTitle":"Features","features":["Basic arithmetic operations","Fraction simplification","Conversion to mixed numbers and decimals"],"applicationsTitle":"Applications","applications":["Cooking and recipes","Construction and carpentry","Mathematics education"]}},"gbkUtf8Encoder":{"convert":{"title":"GBK/UTF-8 Encoding Converter","input":"Input","output":"Output","gbkToUtf8":"GBK → UTF-8","utf8ToGbk":"UTF-8 → GBK","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter GBK encoded hex data...","textInputPlaceholder":"Enter text to convert to GBK...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["GBK to UTF-8: Enter GBK encoded hex data","UTF-8 to GBK: Enter Unicode text","Supports bidirectional conversion of Simplified Chinese"]},"knowledge":{"title":"GBK Encoding Knowledge","items":[{"title":"What is GBK?","content":"GBK is an extended Chinese character encoding standard, covering 21003 Chinese characters, and is the default encoding for Chinese Windows."},{"title":"GBK vs UTF-8","content":"GBK uses double bytes for Chinese, while UTF-8 uses 1-4 variable bytes. UTF-8 is international standard, GBK is mainly for Chinese."}],"featuresTitle":"Key Features","features":["Backward compatible with GB2312","Double-byte encoding","Windows Chinese default"],"applicationsTitle":"Common Applications","applications":["Chinese Windows systems","Legacy web pages","Chinese databases"]}},"gcdCalculator":{"title":"GCD Calculator","description":"Calculate the Greatest Common Divisor (GCD) of numbers.","keywords":"gcd calculator, greatest common divisor, hcf, highest common factor","category":"Math","numbers":"Numbers","numbersPlaceholder":"Enter numbers separated by commas (e.g., 12, 18, 30)","calculate":"Calculate","result":"GCD","clear":"Clear","guide":{"title":"How to Use","items":["Enter two or more integers separated by commas.","Click 'Calculate'.","The Greatest Common Divisor will be displayed."]},"knowledge":{"title":"About GCD","introduction":"The greatest common divisor (GCD) of two or more integers is the largest positive integer that divides each of the integers.","items":[{"title":"Also Known As","content":"Highest Common Factor (HCF)"}],"featuresTitle":"Features","features":["Calculate GCD of multiple numbers","Instant results"],"applicationsTitle":"Applications","applications":["Reducing fractions","Euclidean algorithm","Number theory problems"]}},"gifToJpg":{"title":"GIF to JPG Converter","description":"Extract the first frame from GIF and convert to JPG","uploadTitle":"Upload GIF Image","resultTitle":"Converted JPG Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop an image file","The image will be displayed as a preview after upload","Adjust settings if available (quality, size, etc.)","Click 'Convert' to process the image","Preview the result and check the file size","Click 'Download' to save the converted file","All processing happens in your browser — no uploads"]},"knowledge":{"title":"About GIF to JPG Conversion","items":[{"title":"GIF Format Overview","content":"GIF (Graphics Interchange Format) is a bitmap image format supporting up to 256 colors, lossless compression, and animation. While popular for animations, static GIFs can be efficiently converted to JPG for smaller file sizes when animation is not needed."},{"title":"First Frame Extraction","content":"For animated GIFs, this converter extracts the first frame and converts it to a static JPG image. This is useful when you need a still image from an animation, such as for thumbnails, previews, or social media posts that don't support animation."},{"title":"Quality Considerations","content":"GIF uses a limited 256-color palette, while JPG supports millions of colors. Converting GIF to JPG may slightly improve color representation for some images but introduces lossy compression. Adjust the quality slider to balance file size and visual quality."},{"title":"Privacy & Processing","content":"The conversion happens entirely in your browser using Canvas API. No files are sent to any server. The tool works offline after page load, ensuring your images remain private and secure at all times."}],"featuresTitle":"Key Features","features":["Extract first frame from animated GIFs","Adjustable JPG quality output","Browser-based — no server upload","Fast conversion with instant preview"],"applicationsTitle":"Use Cases","applications":["Creating thumbnails from animated GIFs","Converting GIF screenshots to JPG","Reducing GIF file sizes by converting to JPG","Preparing still images from animations"]}},"gradient-generator":{"title":"CSS Gradient Generator","description":"Visually create linear or radial gradient backgrounds and generate the corresponding CSS code.","gradientType":"Gradient Type","linear":"Linear","radial":"Radial","angle":"Angle","colors":"Color Controls","startColor":"Start Color","endColor":"End Color","preview":"Preview","copyCSS":"Copy Gradient CSS","guide":{"title":"Usage Guide","items":["Choose between 'Linear' or 'Radial' gradient type.","Set the start and end colors, and you can observe the transition changes in between.","For linear gradients, you can adjust the rotation angle via the slider.","Once satisfied, click the 'Copy Gradient CSS' button to apply the generated style to your project."]},"knowledge":{"title":"CSS Gradient Knowledge","items":[{"title":"What are CSS Gradients?","content":"CSS gradients are a variant of the `` data type that allows you to display smooth transitions between two or more specified colors in the background."},{"title":"Linear vs. Radial","content":"Linear gradients transition smoothly along a straight line, while radial gradients spread outward from a point (usually the center) in a circular or elliptical shape."}]}},"hash":{"title":"Hash Generator","button":"Generate Hash","error":"Failed to generate hash","placeholder":"Result will be shown here...","algorithmInfo":"{bits} bits/{chars} characters","algorithms":{"MD5":"128-bit message digest algorithm for generating digital fingerprints","SHA-1":"160-bit secure hash algorithm, formerly widely used for digital signatures","SHA-224":"224-bit SHA-2 hash algorithm with enhanced security","SHA-256":"256-bit SHA-2 hash algorithm, one of the most widely used hash algorithms today","SHA-384":"384-bit SHA-2 hash algorithm providing stronger security guarantees","SHA-512":"512-bit SHA-2 hash algorithm, the longest in the SHA-2 series","SHA3-224":"224-bit SHA-3 hash algorithm, the next-generation cryptographic hash standard","SHA3-256":"256-bit SHA-3 hash algorithm, next-generation standard to replace SHA-2","SHA3-384":"384-bit SHA-3 hash algorithm with higher level of security","SHA3-512":"512-bit SHA-3 hash algorithm, the most secure version in the SHA-3 family","RIPEMD160":"160-bit RACE integrity primitives message digest algorithm, commonly used in Bitcoin address generation"},"otherAlgorithms":"Other Hash Algorithms","case":{"upper":"Upper","lower":"Lower"},"knowledge":{"title":"Hash Algorithm Knowledge:","items":[{"title":"MD5 (Message Digest Algorithm 5)","content":"Generates 128-bit (16-byte) hash values. First-generation hash algorithm designed by Ron Rivest. While not recommended for security purposes due to collision vulnerabilities, it remains widely used for file integrity verification in non-security contexts."},{"title":"SHA-1 (Secure Hash Algorithm 1)","content":"Generates 160-bit (20-byte) hash values. Second-generation hash algorithm designed by the NSA. Not recommended for security-related purposes since collision attacks were proven possible in 2017."},{"title":"SHA-224 (SHA-2 Family)","content":"Generates 224-bit (28-byte) hash values. Member of the third-generation SHA-2 family, offering higher security than SHA-1. Suitable for scenarios requiring strong security with performance considerations."},{"title":"SHA-256 (SHA-2 Family)","content":"Generates 256-bit (32-byte) hash values. The most widely used algorithm in the SHA-2 family, extensively used in digital signatures and blockchain. Currently considered the optimal balance between security and performance."},{"title":"SHA-384 (SHA-2 Family)","content":"Generates 384-bit (48-byte) hash values. High-security version of the SHA-2 family, providing stronger security guarantees than SHA-256. Commonly used in enterprise applications requiring higher security levels."},{"title":"SHA-512 (SHA-2 Family)","content":"Generates 512-bit (64-byte) hash values. The most secure version in the SHA-2 family, providing the highest level of security. Particularly suitable for critical data protection and high-security requirements."},{"title":"SHA3-224 (SHA-3 Family)","content":"Generates 224-bit (28-byte) hash values. Member of the fourth-generation SHA-3 family, based on the Keccak algorithm. Provides different security guarantees than SHA-2 as the new generation cryptographic hash standard."},{"title":"SHA3-256 (SHA-3 Family)","content":"Generates 256-bit (32-byte) hash values. The most commonly used version in the SHA-3 standard, designed to replace SHA-2. Features a novel sponge construction design providing unique security characteristics."},{"title":"SHA3-384 (SHA-3 Family)","content":"Generates 384-bit (48-byte) hash values. High-strength version of the SHA-3 family, providing enhanced security. Suitable for applications requiring long-term security guarantees."},{"title":"SHA3-512 (SHA-3 Family)","content":"Generates 512-bit (64-byte) hash values. The most secure version in the SHA-3 family, providing the highest level of quantum computing attack resistance. Suitable for scenarios with extremely high security requirements."},{"title":"RIPEMD160 (RACE Integrity Primitives Evaluation Message Digest)","content":"Generates 160-bit (20-byte) hash values. Developed by the EU RACE project, independent of the SHA family. Well-known for its use in Bitcoin, primarily used for generating Bitcoin addresses. Provides security guarantees different from the SHA series."}],"featuresTitle":"HASH features","features":["One-way: Cannot reverse-engineer original data from hash","Deterministic: Same input always produces same output","Avalanche effect: Small input changes cause significant output differences","Collision resistance: Difficult to find two inputs producing the same hash"],"applicationsTitle":"Applications","applications":["Password storage: Store password hashes instead of plaintext","Data integrity: Verify file download integrity","Digital signatures: Component of digital signature algorithms","Blockchain: Generate unique transaction identifiers","Deduplication and caching: Quick content comparison"]},"clear":"Clear","inputMode":{"text":"Text Input (UTF-8)","hex":"Hexadecimal Input","file":"File Hash"},"invalidHex":"Invalid hexadecimal input","processingError":"Error processing input","inputFormat":"Input Format","inputPlaceholder":{"utf8":"Enter text to hash...","hex":"Enter hexadecimal data (e.g., 48656C6C6F)..."}},"hashIdentifier":{"inputHash":"Enter unknown hash string","placeholder":"e.g. 5d41402abc4b2a76b9719d911017c592","results":"Identification Results","length":"Length","chars":"chars","charset":"Character Set","possibleAlgorithms":"Possible Algorithms","unknown":"Unknown Format"},"health-blood-alcohol":{"title":"Blood Alcohol Calculator","description":"Estimate your blood alcohol content (BAC)","gender":"Gender","male":"Male","female":"Female","weight":"Body Weight (kg)","drinks":"Number of Standard Drinks","drinkType":"Drink Type","beer":"Beer (5%, 355ml = 1 standard drink)","wine":"Wine (12%, 148ml = 1 standard drink)","shot":"Shot/Spirit (40%, 44ml = 1 standard drink)","hours":"Hours Since First Drink","calculateButton":"Calculate BAC","result":"Estimated BAC","bac":"Blood Alcohol Content","status":"Status","sober":"Sober (< 0.02%)","slight":"Slight Impairment (0.02–0.05%)","moderate":"Moderate Impairment (0.05–0.08%)","severe":"Significant Impairment (0.08%+)","soberIn":"Estimated time to sober","hours_unit":"hours","disclaimer":"Important Disclaimer","disclaimerText":"This calculator provides rough estimates only and should NEVER be used to determine whether it is safe to drive or operate machinery. BAC is affected by many individual factors including food intake, medications, body composition, and genetics. The only safe amount of alcohol before driving is zero. Always arrange a designated driver or alternative transportation after drinking.","guide":{"title":"How to Use","items":["Select your gender (affects the distribution factor in the Widmark formula).","Enter your body weight in kilograms.","Enter the number of standard drinks consumed.","Enter how many hours have passed since your first drink.","Click 'Calculate BAC' and review the estimated result and disclaimer."]},"knowledge":{"title":"About Blood Alcohol Content","items":[{"title":"Widmark Formula","content":"BAC is estimated using the Widmark formula: BAC = (drinks × 14 × 0.806) / (weight × r) − (0.017 × hours). Where r is the body water constant: 0.73 for males and 0.66 for females. 14 grams is the ethanol content of one standard US drink. BAC is expressed as grams per 100 ml of blood (percentage)."},{"title":"Legal Limits","content":"Legal BAC limits for driving vary by country. Most countries set the limit at 0.05% (50 mg/100ml), including Australia, Germany, and most of Europe. The US, Canada, and UK set the limit at 0.08% (80 mg/100ml). Some countries have zero-tolerance policies. Professional drivers often have lower limits of 0.02%."},{"title":"Effects by BAC Level","content":"0.02–0.04%: Relaxation, mild mood elevation. 0.05–0.07%: Mild impairment of judgment and coordination. 0.08–0.10%: Significant impairment of driving ability (above legal limit in most countries). 0.10–0.15%: Slurred speech, loss of coordination. 0.15–0.30%: Severe impairment, possible blackout. Above 0.30%: Life-threatening risk."},{"title":"Factors Affecting BAC","content":"Food significantly slows alcohol absorption — a full stomach can reduce peak BAC by 30–50%. Body fat contains less water than muscle, concentrating alcohol in women (higher body fat %) compared to men. Medications can interact with alcohol and amplify effects. Individual genetic variation in alcohol metabolism (ADH enzyme activity) also affects BAC."}],"featuresTitle":"Key Features","features":["Uses the validated Widmark formula for BAC estimation","Accounts for alcohol elimination over time","Clear status categories with color-coded warnings","Mandatory safety disclaimer for responsible use"]}},"health-bmi-calculator":{"title":"BMI Calculator","description":"Calculate your Body Mass Index and health category","unitSystem":"Unit System","metric":"Metric","imperial":"Imperial","weight":"Weight","height":"Height","weightKg":"Weight (kg)","weightLbs":"Weight (lbs)","heightCm":"Height (cm)","heightFtIn":"Height (ft/in)","feet":"Feet","inches":"Inches","calculateButton":"Calculate BMI","result":"Result","bmiValue":"BMI Value","category":"Category","underweight":"Underweight","normal":"Normal Weight","overweight":"Overweight","obese":"Obese","healthyRange":"Healthy BMI range: 18.5 – 24.9","guide":{"title":"How to Use","items":["Select your preferred unit system: Metric (kg/cm) or Imperial (lbs/ft).","Enter your body weight in the weight field.","Enter your height in the height field.","Click the 'Calculate BMI' button to get your result.","View your BMI value and health category with color-coded feedback."]},"knowledge":{"title":"About BMI","items":[{"title":"What is BMI?","content":"Body Mass Index (BMI) is a numerical value calculated from a person's weight and height. It provides a simple and widely used measure to classify individuals into underweight, normal, overweight, or obese categories. BMI is used worldwide as a screening tool for identifying potential weight problems in adults."},{"title":"BMI Formula","content":"Metric: BMI = weight(kg) ÷ height(m)². Imperial: BMI = 703 × weight(lbs) ÷ height(in)². For example, a 70 kg person who is 1.75 m tall has a BMI of 70 ÷ (1.75²) = 22.9, which falls in the normal range."},{"title":"BMI Categories","content":"BMI below 18.5 is considered Underweight. 18.5–24.9 is Normal Weight. 25.0–29.9 is Overweight. 30.0 and above is Obese. These thresholds are defined by the World Health Organization (WHO) and are used by health professionals globally."},{"title":"Limitations of BMI","content":"BMI does not directly measure body fat and can misclassify individuals. Athletes may have a high BMI due to muscle mass. Elderly individuals may have a normal BMI but carry excess fat. It also does not account for fat distribution, gender differences, or ethnic variations in body composition."}],"featuresTitle":"Key Features","features":["Supports both metric (kg/cm) and imperial (lbs/ft/in) units","Color-coded health categories for quick visual assessment","Instant calculation with real-time result display","Includes healthy BMI range reference"]}},"health-bmr-calculator":{"title":"BMR Calculator","description":"Calculate your Basal Metabolic Rate","gender":"Gender","male":"Male","female":"Female","age":"Age","weight":"Weight (kg)","height":"Height (cm)","calculateButton":"Calculate BMR","result":"Result","bmrValue":"BMR","kcalPerDay":"kcal/day","formula":"Formula Used","formulaName":"Mifflin-St Jeor Equation","formulaMale":"Male: BMR = 10 × weight + 6.25 × height − 5 × age + 5","formulaFemale":"Female: BMR = 10 × weight + 6.25 × height − 5 × age − 161","guide":{"title":"How to Use","items":["Select your biological gender (Male or Female).","Enter your age in years.","Enter your body weight in kilograms (kg).","Enter your height in centimeters (cm).","Click 'Calculate BMR' to see your Basal Metabolic Rate in kcal/day."]},"knowledge":{"title":"About BMR","items":[{"title":"What is BMR?","content":"Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions while at complete rest. These functions include breathing, blood circulation, cell production, and temperature regulation. BMR accounts for about 60–75% of total daily calorie expenditure for most people."},{"title":"Mifflin-St Jeor Equation","content":"The Mifflin-St Jeor equation, developed in 1990, is widely regarded as the most accurate method for estimating BMR. For males: BMR = 10×weight + 6.25×height − 5×age + 5. For females: BMR = 10×weight + 6.25×height − 5×age − 161. Weight is in kg, height in cm, age in years."},{"title":"Factors Affecting BMR","content":"BMR is influenced by several factors: body composition (more muscle = higher BMR), age (BMR decreases with age), gender (males generally have a higher BMR), genetics, hormonal levels (thyroid hormones), and environmental temperature. Regular exercise and building muscle can increase your BMR over time."},{"title":"BMR vs TDEE","content":"BMR represents the minimum calories needed at rest, while Total Daily Energy Expenditure (TDEE) represents the total calories burned daily including activity. TDEE = BMR × Activity Factor. Understanding your BMR is the first step to calculating your actual daily calorie needs for weight management goals."}],"featuresTitle":"Key Features","features":["Uses the Mifflin-St Jeor equation, the most accurate BMR formula","Separate calculations for male and female physiology","Displays the complete formula with your values","Foundation for calculating TDEE and daily calorie targets"]}},"health-body-fat":{"title":"Body Fat Calculator","description":"Estimate your body fat percentage using the US Navy method","gender":"Gender","male":"Male","female":"Female","height":"Height (cm)","neck":"Neck Circumference (cm)","waist":"Waist Circumference (cm)","hip":"Hip Circumference (cm)","hipNote":"Required for females only","calculateButton":"Calculate Body Fat","result":"Result","bodyFatPercent":"Body Fat","category":"Category","essential":"Essential Fat","fitness":"Fitness","athletic":"Athletic","average":"Average","obese":"Obese","categories":"Body Fat Categories","male_essential":"2–5%","male_athletic":"6–13%","male_fitness":"14–17%","male_average":"18–24%","male_obese":"25%+","female_essential":"10–13%","female_athletic":"14–20%","female_fitness":"21–24%","female_average":"25–31%","female_obese":"32%+","guide":{"title":"How to Use","items":["Select your gender (male or female).","Measure and enter your height in centimeters.","Measure your neck circumference at the narrowest point and enter it.","Measure your waist circumference at the narrowest point (males) or navel level (females).","For females, also measure hip circumference at the widest point, then click 'Calculate'."]},"knowledge":{"title":"About Body Fat","items":[{"title":"US Navy Method","content":"The US Navy circumference method estimates body fat percentage using body measurements. For males, it uses height, neck, and waist circumference. For females, it also includes hip circumference. The formula is: Male: 495/(1.0324 − 0.19077×log10(waist−neck) + 0.15456×log10(height)) − 450."},{"title":"How to Measure","content":"Measure neck at its narrowest point, below the larynx. Measure waist for males at the navel, for females at the narrowest part. Measure hips at the widest point. Use a flexible tape measure and breathe normally while measuring. Take measurements in the morning before eating for consistency."},{"title":"Body Fat Categories","content":"Essential fat is the minimum needed for survival (men 2–5%, women 10–13%). Athletes typically have 6–13% (men) or 14–20% (women). Fitness level is 14–17% (men) or 21–24% (women). Average is 18–24% (men) or 25–31% (women). Obese is 25%+ (men) or 32%+ (women)."},{"title":"Limitations","content":"The US Navy method is less accurate than DEXA scans or hydrostatic weighing but requires no special equipment. Accuracy can vary based on measurement technique, hydration status, and body proportions. It tends to overestimate body fat in very lean individuals and underestimate in very obese individuals."}],"featuresTitle":"Key Features","features":["Uses the validated US Navy circumference method","Different formulas for male and female physiology","Color-coded body fat category classification","Shows reference ranges for all categories"]}},"health-calorie-calculator":{"title":"Calorie Calculator","description":"Calculate daily calorie needs for your goals","gender":"Gender","male":"Male","female":"Female","age":"Age","weight":"Weight (kg)","height":"Height (cm)","activityLevel":"Activity Level","sedentary":"Sedentary","lightlyActive":"Lightly Active","moderatelyActive":"Moderately Active","veryActive":"Very Active","extremelyActive":"Extremely Active","goal":"Weight Goal","loseFast":"Lose Weight Fast (−1 kg/week)","loseSlow":"Lose Weight (−0.5 kg/week)","maintain":"Maintain Weight","gainSlow":"Gain Weight (+0.25 kg/week)","gainFast":"Gain Weight Fast (+0.5 kg/week)","calculateButton":"Calculate Calories","result":"Result","dailyCalories":"Daily Calorie Target","kcalPerDay":"kcal/day","weeklyChange":"Estimated weekly change","guide":{"title":"How to Use","items":["Enter your gender, age, weight, and height.","Select your typical activity level from the dropdown.","Choose your weight goal (lose, maintain, or gain weight).","Click 'Calculate Calories' to see your recommended daily intake.","Follow the daily calorie target to progress toward your goal."]},"knowledge":{"title":"About Calorie Needs","items":[{"title":"How Calories Work","content":"A calorie is a unit of energy. Your body needs a certain number of calories to maintain its current weight (TDEE). Eating fewer calories than you burn creates a deficit that leads to weight loss. Eating more creates a surplus that promotes weight gain. 3,500 calories roughly equals 0.45 kg (1 lb) of body fat."},{"title":"Safe Deficit and Surplus","content":"A safe calorie deficit for weight loss is 250–500 kcal/day below TDEE, resulting in 0.25–0.5 kg/week loss. For fast loss, a 1000 kcal deficit may be used but this requires medical supervision. For muscle gain, a modest 250–500 kcal surplus minimizes fat gain while supporting muscle growth."},{"title":"Minimum Calorie Thresholds","content":"Health professionals generally recommend a minimum of 1200 kcal/day for women and 1500 kcal/day for men, even when cutting calories. Going below these thresholds can lead to nutrient deficiencies, muscle loss, slowed metabolism, and other health problems. Always consult a doctor before extreme calorie restriction."},{"title":"Adjusting Over Time","content":"As your weight changes, your TDEE changes too. Recalculate your calorie needs every 4–6 weeks or after losing/gaining 5+ kg. Your body also adapts to calorie restriction over time (metabolic adaptation), so occasional 'refeed' days at maintenance calories can help maintain metabolic rate during a diet."}],"featuresTitle":"Key Features","features":["Calculates calories for 5 different weight goals","Based on the accurate Mifflin-St Jeor formula","Accounts for 5 activity levels","Shows estimated weekly weight change for each goal"]}},"health-due-date":{"title":"Due Date Calculator","description":"Calculate pregnancy due date from LMP, conception, or ultrasound","method":"Calculation Method","lmpMethod":"Last Menstrual Period (LMP)","conceptionMethod":"Conception Date","ultrasoundMethod":"Ultrasound Dating","lmpDate":"First Day of Last Period","conceptionDate":"Conception Date","ultrasoundDate":"Ultrasound Date","ultrasoundWeeks":"Weeks at Ultrasound","ultrasoundDays":"Additional Days","calculateButton":"Calculate Due Date","dueDate":"Estimated Due Date","currentWeek":"Current Gestational Age","trimesterDates":"Trimester Dates","firstTrimester":"First Trimester","secondTrimester":"Second Trimester","thirdTrimester":"Third Trimester","weeks":"weeks","days":"days","guide":{"title":"How to Use","items":["Select the calculation method: LMP date, Conception date, or Ultrasound dating.","For LMP method, enter the first day of your last menstrual period.","For Conception method, enter the date of conception (this is 14 days after LMP on average).","For Ultrasound method, enter the ultrasound date and the gestational age determined at that scan.","Click 'Calculate Due Date' to see your estimated due date and trimester dates."]},"knowledge":{"title":"About Due Date Calculation","items":[{"title":"Three Calculation Methods","content":"The LMP method (Naegele's rule: LMP + 280 days) is the standard approach used in most pregnancies. Conception date method adds 266 days to the conception date. Ultrasound dating is the most accurate method, using fetal measurements to estimate gestational age. An early ultrasound (before 14 weeks) can revise the due date."},{"title":"Accuracy of Each Method","content":"LMP method assumes a regular 28-day cycle with ovulation on day 14 — accuracy decreases with irregular cycles. Conception dating requires knowing the exact conception date, which is rarely known precisely. Ultrasound dating is most accurate in the first trimester (±5 days) and becomes less precise as pregnancy progresses."},{"title":"Trimester Dates","content":"First trimester: weeks 1–12 (days 1–84). Second trimester: weeks 13–26 (days 85–182). Third trimester: weeks 27–40 (days 183–280). These dates are calculated from the first day of the LMP. The second trimester often brings relief from morning sickness, while the third involves rapid fetal growth."},{"title":"When Babies Actually Arrive","content":"Only about 5% of babies arrive on their exact due date. 80% arrive within 2 weeks before or after the due date. Births at 37–42 weeks are considered full-term. Preterm birth is before 37 weeks, and post-term is after 42 weeks. A due date is best considered a due 'period' rather than an exact day."}],"featuresTitle":"Key Features","features":["Supports three different calculation methods","Shows complete trimester date ranges","Displays current gestational age in weeks and days","Most accurate method selection guidance"]}},"health-heart-rate-zone":{"title":"Heart Rate Zone Calculator","description":"Calculate your 5 training heart rate zones","age":"Age","restingHR":"Resting Heart Rate (bpm)","restingHROptional":"Optional — for Karvonen method","calculateButton":"Calculate Zones","maxHR":"Maximum Heart Rate","zone":"Zone","zoneName":"Zone Name","hrRange":"Heart Rate Range","bpm":"bpm","purpose":"Purpose","zone1Name":"Zone 1 — Recovery","zone2Name":"Zone 2 — Aerobic Base","zone3Name":"Zone 3 — Aerobic Threshold","zone4Name":"Zone 4 — Lactate Threshold","zone5Name":"Zone 5 — Maximum","zone1Purpose":"Active recovery, warm-up, cool-down","zone2Purpose":"Fat burning, endurance building","zone3Purpose":"Aerobic fitness, tempo training","zone4Purpose":"Speed, performance improvement","zone5Purpose":"Maximum effort, sprint training","percentOfMax":"% of Max HR","guide":{"title":"How to Use","items":["Enter your age to calculate maximum heart rate (220 − age).","Optionally enter your resting heart rate for Karvonen formula zones.","Click 'Calculate Zones' to see all 5 training zones.","Use a heart rate monitor during exercise to stay in your target zone.","Match the zone to your training goal for optimal results."]},"knowledge":{"title":"About Heart Rate Training","items":[{"title":"Maximum Heart Rate","content":"Maximum heart rate (MHR) is the highest number of beats per minute your heart can safely achieve during exercise. The standard estimate is 220 − age. For example, a 30-year-old has an estimated MHR of 190 bpm. This is an approximation; actual MHR can vary by ±10–12 bpm and should ideally be measured during a supervised stress test."},{"title":"The 5 Training Zones","content":"Zone 1 (50–60% MHR): Very light recovery activity. Zone 2 (60–70% MHR): Light aerobic, primary fat-burning zone. Zone 3 (70–80% MHR): Moderate aerobic, improves endurance. Zone 4 (80–90% MHR): Hard anaerobic effort, improves speed. Zone 5 (90–100% MHR): Maximum sprint effort, builds peak power."},{"title":"Zone 2 Training Benefits","content":"Zone 2 training (60–70% MHR) is gaining popularity due to its effectiveness for building aerobic base and fat metabolism without excessive fatigue. Training predominantly in Zone 2 improves mitochondrial density, lactate clearance, and cardiovascular efficiency. Top endurance athletes spend 80% of training time in Zone 2."},{"title":"Karvonen Formula","content":"The Karvonen (Heart Rate Reserve) method provides more personalized zones by accounting for your resting heart rate. HRR = Max HR − Resting HR. Target HR = Resting HR + (HRR × intensity%). For example, Zone 2 target = Resting HR + (HRR × 60–70%). This method is more accurate for trained individuals."}],"featuresTitle":"Key Features","features":["Calculates all 5 standard training zones","Color-coded zones for easy identification","Optional Karvonen method for resting heart rate users","Shows purpose and benefits of each zone"]}},"health-ideal-weight":{"title":"Ideal Weight Calculator","description":"Find your ideal weight using multiple scientific formulas","gender":"Gender","male":"Male","female":"Female","height":"Height (cm)","calculateButton":"Calculate Ideal Weight","result":"Ideal Weight Results","formula":"Formula","idealWeight":"Ideal Weight (kg)","bmiRange":"Healthy BMI Range","devineFormula":"Devine Formula","robinsonFormula":"Robinson Formula","millerFormula":"Miller Formula","bmiMethod":"BMI Range (18.5–24.9)","bmiMin":"Min (BMI 18.5)","bmiMax":"Max (BMI 24.9)","guide":{"title":"How to Use","items":["Select your biological gender.","Enter your height in centimeters.","Click 'Calculate Ideal Weight' to see results.","Compare the results from three different scientific formulas.","Use the BMI range as a general healthy weight reference."]},"knowledge":{"title":"About Ideal Weight","items":[{"title":"Devine Formula (1974)","content":"The Devine formula was originally created for pharmaceutical dosing calculations. For males: 50 + 2.3 × (height_in − 60) kg. For females: 45.5 + 2.3 × (height_in − 60) kg. It is one of the most widely used formulas and is still referenced in medical contexts today."},{"title":"Robinson Formula (1983)","content":"Robinson's formula modified the Devine formula with slightly different coefficients. For males: 52 + 1.9 × (height_in − 60) kg. For females: 49 + 1.7 × (height_in − 60) kg. It tends to give slightly higher ideal weights for both males and females compared to Devine."},{"title":"Miller Formula (1983)","content":"The Miller formula provides another variation. For males: 56.2 + 1.41 × (height_in − 60) kg. For females: 53.1 + 1.36 × (height_in − 60) kg. This formula generally produces the highest ideal weights among the three and may be more appropriate for larger frame individuals."},{"title":"BMI Method","content":"The BMI method calculates the weight range corresponding to a BMI of 18.5 (lower bound) to 24.9 (upper bound) for your height. Weight = BMI × height(m)². This range is often the most flexible as it accounts for individual body composition variations and is endorsed by the WHO."}],"featuresTitle":"Key Features","features":["Shows results from three different scientific formulas simultaneously","Includes BMI-based healthy weight range","Gender-specific calculations for accuracy","Easy comparison table for all formula results"]}},"health-macros-calculator":{"title":"Macronutrient Calculator","description":"Calculate protein, carbs, and fat targets for your diet","calories":"Daily Calories Target","dietType":"Diet Type","balanced":"Balanced","lowCarb":"Low Carb","highProtein":"High Protein","keto":"Ketogenic (Keto)","vegan":"Vegan","calculateButton":"Calculate Macros","result":"Your Daily Macros","protein":"Protein","carbs":"Carbohydrates","fat":"Fat","grams":"grams","percent":"%","kcal":"kcal","distribution":"Macro Distribution","guide":{"title":"How to Use","items":["Enter your daily calorie target (use the Calorie Calculator if needed).","Select the diet type that best matches your nutrition approach.","Click 'Calculate Macros' to see your protein, carbs, and fat targets.","Use the progress bars to visualize the macro distribution.","Track your daily food intake to hit these macro targets."]},"knowledge":{"title":"About Macronutrients","items":[{"title":"What are Macronutrients?","content":"Macronutrients are the three main categories of nutrients that provide energy: protein (4 kcal/g), carbohydrates (4 kcal/g), and fat (9 kcal/g). Unlike micronutrients (vitamins and minerals), macronutrients are needed in large quantities. Balancing macros properly supports body composition, energy levels, and overall health."},{"title":"Diet Type Ratios","content":"Balanced: 30% protein, 40% carbs, 30% fat — suitable for general health. Low-carb: 40% protein, 20% carbs, 40% fat — reduces insulin spikes. High-protein: 40% protein, 30% carbs, 30% fat — ideal for muscle building. Keto: 25% protein, 5% carbs, 70% fat — induces ketosis. Vegan: 20% protein, 55% carbs, 25% fat — plant-based focus."},{"title":"Protein Importance","content":"Protein is essential for muscle repair and growth, enzyme production, immune function, and satiety. The general recommendation is 1.6–2.2 g/kg body weight for those who exercise regularly. Higher protein intake (2.2–3.1 g/kg) during calorie restriction helps preserve lean muscle mass while losing fat."},{"title":"Carbs and Fats","content":"Carbohydrates are the body's preferred energy source, especially during high-intensity exercise. Complex carbs (whole grains, legumes) are preferred over simple sugars. Dietary fats are essential for hormone production, vitamin absorption, and brain function. Focus on unsaturated fats from nuts, avocados, and olive oil."}],"featuresTitle":"Key Features","features":["Supports 5 popular diet approaches with optimized macro ratios","Visual progress bars for macro distribution","Calculates grams and calories for each macro","Easy to use alongside calorie calculator"]}},"health-one-rep-max":{"title":"One Rep Max Calculator","description":"Estimate your 1-rep max from submaximal sets","weight":"Weight Lifted","reps":"Repetitions","unit":"Weight Unit","kg":"kg","lbs":"lbs","calculateButton":"Calculate 1RM","result":"Estimated 1 Rep Max","formula":"Formula","estimatedMax":"Estimated 1RM","trainingTable":"Training Percentages","percent":"% of 1RM","weightForReps":"Weight for Reps","repsRange":"Rep Range","brzycki":"Brzycki","epley":"Epley","lombardi":"Lombardi","oconner":"O'Conner","average":"Average","guide":{"title":"How to Use","items":["Enter the weight you lifted in your set.","Enter the number of repetitions you completed (1–15).","Select the weight unit (kg or lbs).","Click 'Calculate 1RM' to see estimates from four different formulas.","Use the training table to find appropriate weights for different rep ranges."]},"knowledge":{"title":"About One Rep Max","items":[{"title":"What is 1RM?","content":"The one-repetition maximum (1RM) is the maximum amount of weight you can lift for a single repetition with proper form. It is the gold standard for measuring absolute strength. While directly testing 1RM is effective, it carries injury risk, especially for beginners. Submaximal estimation formulas provide a safer alternative."},{"title":"The Four Formulas","content":"Brzycki: weight × 36/(37 − reps) — most accurate for 1–10 reps. Epley: weight × (1 + 0.0333 × reps) — widely used in fitness software. Lombardi: weight × reps^0.1 — tends to give slightly higher estimates. O'Conner: weight × (1 + 0.025 × reps) — more conservative estimate. Accuracy decreases above 10 reps for all formulas."},{"title":"Training Percentages","content":"50% 1RM: 20+ reps, light warm-up sets. 60% 1RM: 15–20 reps, endurance training. 70% 1RM: 10–15 reps, hypertrophy focus. 80% 1RM: 6–10 reps, strength and size. 90% 1RM: 3–5 reps, strength training. 95%+ 1RM: 1–3 reps, max strength/powerlifting."},{"title":"Accuracy and Safety","content":"For best accuracy, use a weight you can lift for 3–8 reps (closer to failure). Avoid using sets where you complete more than 12 reps, as formula accuracy significantly decreases. Never attempt a true 1RM without a spotter and proper warm-up. Rest 3–5 minutes between near-maximal sets to ensure full recovery."}],"featuresTitle":"Key Features","features":["Uses four different validated formulas for comparison","Shows training percentage table for programming","Supports both kg and lbs","Safe way to estimate max strength without testing to failure"]}},"health-ovulation":{"title":"Ovulation Calculator","description":"Track ovulation day and fertile window","lastPeriod":"First Day of Last Period","cycleLength":"Menstrual Cycle Length","days":"days","calculateButton":"Calculate","ovulationDay":"Estimated Ovulation Day","fertileWindow":"Fertile Window (7 days)","fertileStart":"Fertile Window Start","fertileEnd":"Fertile Window End","nextPeriod":"Next Period Expected","calendar":"3-Month Calendar Overview","fertile":"Fertile","period":"Period","ovulation":"Ovulation","safe":"Safe","cycle":"Cycle","guide":{"title":"How to Use","items":["Enter the first day of your last menstrual period.","Enter your typical menstrual cycle length (21–35 days; default 28).","Click 'Calculate' to see your ovulation date and fertile window.","The fertile window includes the 5 days before ovulation, ovulation day, and 1 day after.","View the 3-month calendar to plan ahead for multiple cycles."]},"knowledge":{"title":"About Ovulation","items":[{"title":"How Ovulation Works","content":"Ovulation occurs when a mature egg is released from the ovary. This typically happens around day 14 of a 28-day cycle, but varies with cycle length. The formula is: Ovulation Day = First Day of Last Period + (Cycle Length − 14). The 14 days after ovulation (luteal phase) is relatively consistent across women, regardless of cycle length."},{"title":"Fertile Window","content":"Sperm can survive in the female reproductive tract for up to 5 days, while an egg remains viable for only 12–24 hours after ovulation. This creates a fertile window of about 6 days: the 5 days before ovulation plus the day of ovulation itself. The highest chance of conception is 1–2 days before ovulation."},{"title":"Signs of Ovulation","content":"Physical signs of ovulation include: changes in cervical mucus (becomes clear and stretchy, like raw egg white), a slight rise in basal body temperature (0.2–0.5°C), mild one-sided pelvic pain (mittelschmerz), breast tenderness, and increased libido. Ovulation predictor kits (OPKs) detect the LH surge that occurs 24–36 hours before ovulation."},{"title":"Cycle Variation","content":"A normal menstrual cycle ranges from 21–35 days. Cycles shorter than 21 or longer than 35 days may indicate hormonal imbalances. Stress, illness, significant weight changes, and travel can temporarily disrupt cycle regularity. Women with irregular cycles benefit most from tracking multiple cycles or using OPKs to confirm ovulation timing."}],"featuresTitle":"Key Features","features":["Calculates ovulation day based on cycle length","Shows the full 7-day fertile window","Displays next period expected date","3-month calendar view for planning ahead"]}},"health-pace-calculator":{"title":"Running Pace Calculator","description":"Calculate running pace, time, or distance","distance":"Distance","time":"Time","pace":"Pace","calculate":"Calculate","km":"km","miles":"miles","unit":"Distance Unit","kmPerMin":"min/km","milePerMin":"min/mile","speed":"Speed","kmh":"km/h","mph":"mph","calculateButton":"Calculate","result":"Result","distanceLabel":"Distance","timeLabel":"Time (hh:mm:ss)","paceLabel":"Pace (mm:ss per km)","hhmm":"hh:mm:ss format","mmss":"mm:ss format","hours":"hours","minutes":"minutes","seconds":"seconds","calculate_from":"Calculate","from_distance_time":"Pace from Distance & Time","from_distance_pace":"Time from Distance & Pace","from_time_pace":"Distance from Time & Pace","equivalent_speed":"Equivalent Speed","guide":{"title":"How to Use","items":["Select what you want to calculate: Pace, Time, or Distance.","Enter the two known values in the corresponding fields.","Enter time in hours, minutes, and seconds fields.","Enter pace as minutes and seconds per kilometer or mile.","Click 'Calculate' to find the missing value."]},"knowledge":{"title":"About Running Pace","items":[{"title":"What is Running Pace?","content":"Running pace is the time it takes to cover one unit of distance, expressed as minutes per kilometer (min/km) or minutes per mile (min/mile). Pace is the inverse of speed. A pace of 5:00 min/km equals a speed of 12 km/h. Tracking pace is essential for training at the correct intensity and racing strategically."},{"title":"Pace vs Speed","content":"Pace and speed measure the same thing from different perspectives. Pace = time ÷ distance. Speed = distance ÷ time. Runners typically use pace (min/km or min/mile), while cyclists and swimmers more commonly use speed. Converting between them: Speed (km/h) = 60 ÷ Pace (min/km)."},{"title":"Training Pace Zones","content":"Easy/recovery pace: 60–70% of race pace. Long run pace: 65–75% of race pace. Tempo/threshold pace: 85–90% of race pace. Interval/speed pace: 95–105% of race pace. Easy runs should make up 80% of training volume, with hard workouts limited to 20% to prevent overtraining and injury."},{"title":"Pacing Strategy","content":"Even pacing (running each km at the same pace) is generally the most efficient strategy for distance events. Negative splits (slightly faster second half) can improve performance by avoiding early fatigue. Many elite marathon runners finish 1–2 minutes faster in the second half. Avoid starting too fast, which depletes glycogen early."}],"featuresTitle":"Key Features","features":["Calculate pace, time, or distance from any two known values","Supports both metric (km) and imperial (miles) units","Shows equivalent speed in km/h or mph","Time input in intuitive hours/minutes/seconds format"]}},"health-pet-age":{"title":"Pet Age Calculator","description":"Convert your pet's age to human years","animal":"Pet Type","dog":"Dog","cat":"Cat","dogSize":"Dog Size","small":"Small (< 9 kg)","medium":"Medium (9–23 kg)","large":"Large (> 23 kg)","petAge":"Pet Age","petYears":"Years","petMonths":"Months","calculateButton":"Calculate Human Age","result":"Result","humanAge":"Human Age Equivalent","humanYears":"human years","lifeStage":"Life Stage","puppy":"Puppy / Kitten","young":"Young Adult","adult":"Adult","senior":"Senior","geriatric":"Geriatric","guide":{"title":"How to Use","items":["Select your pet type: Dog or Cat.","For dogs, select the size category (small, medium, or large).","Enter your pet's age in years and optionally months.","Click 'Calculate Human Age' to see the equivalent human age.","View the life stage classification for your pet."]},"knowledge":{"title":"About Pet Age Conversion","items":[{"title":"The Old Myth: 1 Year = 7 Human Years","content":"The '1 dog year = 7 human years' rule is a simplification. Scientists have found that aging is not linear. Dogs mature very rapidly in their first two years — a 1-year-old dog is developmentally similar to a 15-year-old human. After the first two years, the aging rate slows and varies significantly by breed size."},{"title":"Dog Size and Aging","content":"Smaller dogs tend to live longer than larger breeds. Small dogs (< 9 kg) age at about 4.5 years/year after age 2. Medium dogs (9–23 kg) age at 5 years/year. Large dogs (> 23 kg) age at 6.5 years/year. Giant breeds (> 45 kg) have the shortest lifespans, often only 8–10 years. The reasons for this size-lifespan relationship are not fully understood."},{"title":"Cat Aging","content":"Cats generally age more uniformly than dogs regardless of size. Year 1 = 15 human years. Year 2 = 24 human years (+9). Years 3+ = +4 human years per year. A 10-year-old cat is equivalent to approximately 56 human years. Indoor cats typically live 12–18 years, while outdoor cats average 5–7 years due to various environmental risks."},{"title":"Life Stages","content":"Puppy/Kitten: birth to ~1 year, rapid development. Young Adult: 1–3 years, peak physical condition. Adult: 3–7 years, mature and active. Senior: 7–10 years, may show early aging signs. Geriatric: 10+ years, requires more veterinary attention. Regular vet check-ups become increasingly important as pets enter their senior years."}],"featuresTitle":"Key Features","features":["Separate calculations for dogs (3 size categories) and cats","Non-linear age conversion model based on research","Life stage classification for health guidance","Supports age input in years and months"]}},"health-pregnancy-calculator":{"title":"Pregnancy Calculator","description":"Calculate due date and pregnancy milestones","lmpDate":"Last Menstrual Period (LMP)","lmpLabel":"First day of your last period","calculateButton":"Calculate","dueDate":"Estimated Due Date","currentWeek":"Current Gestational Age","daysRemaining":"Days Until Due Date","trimester":"Trimester","firstTrimester":"First Trimester","secondTrimester":"Second Trimester","thirdTrimester":"Third Trimester","weeks":"weeks","days":"days","weeksPregnant":"weeks pregnant","firstTrimesterDates":"Weeks 1–12","secondTrimesterDates":"Weeks 13–26","thirdTrimesterDates":"Weeks 27–40","timeline":"Pregnancy Timeline","milestone":"Milestone","date":"Approximate Date","week8":"Week 8 — Heartbeat detectable","week12":"Week 12 — First trimester ends","week20":"Week 20 — Anatomy scan","week24":"Week 24 — Viability milestone","week28":"Week 28 — Third trimester begins","week36":"Week 36 — Term approaches","week40":"Week 40 — Due date","guide":{"title":"How to Use","items":["Select the first day of your last menstrual period using the date picker.","Click 'Calculate' to compute your estimated due date.","View your current gestational age in weeks and days.","See how many days remain until your estimated due date.","Review the trimester timeline and key pregnancy milestones."]},"knowledge":{"title":"About Pregnancy Calculation","items":[{"title":"Naegele's Rule","content":"Naegele's rule is the standard method for calculating an estimated due date. The formula adds 280 days (40 weeks) to the first day of the last menstrual period (LMP). This assumes a 28-day cycle with ovulation on day 14. The formula was developed by Franz Karl Naegele in the early 19th century and remains in widespread clinical use."},{"title":"Gestational Age","content":"Gestational age is counted from the first day of the last menstrual period, not from conception. This means pregnancy is considered to begin 2 weeks before actual conception. A full-term pregnancy is 40 weeks (280 days) from LMP. Babies born between 37 and 42 weeks are considered full-term."},{"title":"Trimesters","content":"Pregnancy is divided into three trimesters. The first trimester (weeks 1–12) involves rapid organ development and has the highest risk of miscarriage. The second trimester (weeks 13–26) is typically the most comfortable. The third trimester (weeks 27–40) involves rapid fetal growth and preparation for birth."},{"title":"Accuracy of Due Date","content":"Only about 5% of babies are born on their exact due date. Most births occur within 2 weeks before or after the estimated date. An early ultrasound (before 14 weeks) provides the most accurate dating by measuring fetal size. Due date accuracy decreases with irregular menstrual cycles."}],"featuresTitle":"Key Features","features":["Calculates due date using Naegele's rule","Shows current gestational age in weeks and days","Displays trimester information and key milestones","Counts down days remaining until due date"]}},"health-running-pace":{"title":"Race Pace Calculator","description":"Calculate finish times and split paces for common race distances","distance":"Race Distance","customDistance":"Custom Distance (km)","pace":"Pace (min/km)","paceMin":"Minutes","paceSec":"Seconds","targetTime":"Target Finish Time","targetHours":"Hours","targetMinutes":"Minutes","targetSeconds":"Seconds","preset5K":"5K (5 km)","preset10K":"10K (10 km)","presetHalf":"Half Marathon (21.0975 km)","presetFull":"Full Marathon (42.195 km)","calculateButton":"Calculate","finishTime":"Estimated Finish Time","averagePace":"Average Pace","splitTime":"Per-Kilometer Split Times","km":"km","perKm":"per km","mode":"Calculate","fromPace":"Finish Time from Pace","fromTime":"Pace from Target Time","guide":{"title":"How to Use","items":["Select a preset race distance or enter a custom distance.","Choose calculation mode: enter pace to get finish time, or enter target time to get required pace.","Enter your pace (minutes and seconds per kilometer) or target finish time.","Click 'Calculate' to see your estimated finish time or required pace.","Review the per-kilometer split times to plan your race strategy."]},"knowledge":{"title":"About Race Pacing","items":[{"title":"Common Race Distances","content":"5K (5 km) is great for beginners and speed work. 10K (10 km) requires a balance of speed and endurance. Half marathon (21.0975 km) is a popular intermediate challenge. Full marathon (42.195 km) is the ultimate endurance test. Ultra-marathons exceed 42.195 km and require months of specialized training."},{"title":"Split Time Strategy","content":"A split is the time taken to complete each kilometer or mile segment. Even splits mean each km is run in the same time. Negative splits mean the second half is run faster than the first. Research shows that negative splits or even splits lead to better overall times compared to going out too fast (positive splits)."},{"title":"Marathon Pace Guide","content":"A sub-4-hour marathon requires a pace of 5:41/km. Sub-3:30 requires 4:58/km. Sub-3:00 (competitive) requires 4:16/km. For a first marathon, a conservative strategy is to run the first half at 3–5 seconds per km slower than goal pace, allowing energy reserves for the challenging final 10 km."},{"title":"Race Day Factors","content":"Weather significantly affects race performance. Ideal race temperature is 7–15°C. Heat above 20°C slows pace by 2–5% per degree. Humidity above 60% further impairs cooling. Altitude reduces oxygen availability. Wind resistance can add 2–8% energy cost. Account for these factors when setting a realistic goal pace."}],"featuresTitle":"Key Features","features":["Preset distances for 5K, 10K, half and full marathon","Two calculation modes: pace-to-time or time-to-pace","Detailed per-kilometer split time table","Custom distance support for any race length"]}},"health-shoe-size":{"title":"Shoe Size Converter","description":"Convert shoe sizes between CN, US, UK, EU and foot length","fromSystem":"From Size System","cn":"CN (China)","eu":"EU (Europe)","uk":"UK (United Kingdom)","usM":"US Men","usW":"US Women","footLength":"Foot Length (cm)","shoeSize":"Shoe Size","selectSize":"Select your size","calculateButton":"Convert Size","result":"Size Equivalents","equivalent":"Equivalent Sizes","system":"System","size":"Size","guide":{"title":"How to Use","items":["Select the size system your current shoe size is in.","Choose your shoe size from the dropdown.","Click 'Convert Size' to see the equivalent sizes in all systems.","Use the foot length (cm) option for the most accurate conversion.","Measure your foot from heel to longest toe for foot length measurement."]},"knowledge":{"title":"About Shoe Sizing","items":[{"title":"International Size Systems","content":"Different countries use different shoe sizing systems. The CN (Chinese) system is similar to EU. EU sizes are based on Paris Points (2/3 cm). UK sizes are based on barleycorns (1/3 inch) starting from 0. US sizes differ for men and women, with women's sizes typically running 1.5 sizes larger than men's for the same foot length."},{"title":"How to Measure Your Foot","content":"For accurate measurement: stand on a piece of paper and trace your foot outline. Measure from heel to the longest toe (usually the big toe or second toe). Measure both feet and use the larger measurement. Measure in the afternoon or evening when feet are slightly larger. Add 0.5–1 cm to your measured length for comfort fit."},{"title":"Width and Fit","content":"Shoe width is not standardized internationally. Common US/UK width codes: N/2A (narrow), M/B (medium/regular), W/D (wide), XW/2E (extra wide). EU shoes typically come in one width. Many brands offer wider options. A shoe that fits in length but not width can cause blisters, bunions, and toe problems over time."},{"title":"Online Shopping Tips","content":"When buying shoes online, always check the specific brand's size chart as sizes vary between manufacturers. Read reviews about whether a brand runs small or large. If between sizes, size up for athletic shoes (you need room for foot expansion during exercise). For dress shoes and sandals, you can usually size down. Keep the receipt for exchanges."}],"featuresTitle":"Key Features","features":["Converts between CN, EU, UK, US Men, US Women, and foot length","Complete size chart from size 35 to 46","Measurement tips for accurate sizing","Clear table showing all equivalent sizes at once"]}},"health-sleep-calculator":{"title":"Sleep Calculator","description":"Find optimal sleep times based on 90-minute sleep cycles","mode":"Calculation Mode","wakeUpMode":"I want to wake up at...","bedtimeMode":"I want to go to sleep at...","wakeTime":"Wake-up Time","sleepTime":"Bedtime","calculateButton":"Calculate","result":"Recommended Times","cycles":"Sleep Cycles","cycleCount":"cycles","recommended":"Recommended","goodOption":"Good Option","idealOption":"Ideal","fallAsleep":"You fall asleep in about 14 minutes","hoursOfSleep":"hours of sleep","wakeUpTimes":"Best times to wake up","bedtimeTimes":"Best times to go to bed","guide":{"title":"How to Use","items":["Select your calculation mode: wake-up time or bedtime.","Enter the time you want to wake up or go to sleep.","Click 'Calculate' to see the recommended sleep or wake times.","Times are calculated based on 90-minute sleep cycles.","The calculator accounts for approximately 14 minutes to fall asleep."]},"knowledge":{"title":"About Sleep Cycles","items":[{"title":"Sleep Cycle Basics","content":"A complete sleep cycle lasts approximately 90 minutes and consists of four stages: three NREM (non-REM) stages and one REM stage. NREM Stage 1 is light sleep lasting 5–10 minutes. NREM Stage 2 consolidates memory. NREM Stage 3 is deep restorative sleep. REM sleep involves dreaming and emotional processing. A full night includes 4–6 complete cycles."},{"title":"Why Cycles Matter","content":"Waking up at the end of a cycle (light sleep stage) leaves you feeling refreshed. Waking in the middle of a deep sleep cycle causes sleep inertia — that groggy, disoriented feeling. Timing your alarm to align with the end of a 90-minute cycle can dramatically improve how you feel in the morning, even with less total sleep."},{"title":"Optimal Sleep Duration","content":"Adults need 7–9 hours of sleep per night (4–6 full cycles). Teenagers need 8–10 hours. School-age children need 9–11 hours. Consistent sleep deprivation impairs cognitive function, immune response, emotional regulation, and metabolism. Even one night of poor sleep can reduce alertness and performance by 20–30%."},{"title":"Sleep Hygiene Tips","content":"Maintain a consistent sleep schedule even on weekends. Keep your bedroom cool (18–20°C), dark, and quiet. Avoid screens (phones, TV) 1 hour before bed — blue light suppresses melatonin. Avoid caffeine after 2 pm. Regular exercise improves sleep quality but avoid vigorous exercise within 2 hours of bedtime."}],"featuresTitle":"Key Features","features":["Calculates optimal times based on 90-minute sleep cycles","Accounts for 14-minute average time to fall asleep","Shows multiple options with cycle count for each","Two modes: wake-up time or bedtime calculation"]}},"health-tdee-calculator":{"title":"TDEE Calculator","description":"Calculate your Total Daily Energy Expenditure","gender":"Gender","male":"Male","female":"Female","age":"Age","weight":"Weight (kg)","height":"Height (cm)","activityLevel":"Activity Level","sedentary":"Sedentary","lightlyActive":"Lightly Active","moderatelyActive":"Moderately Active","veryActive":"Very Active","extremelyActive":"Extremely Active","sedentaryDesc":"Little or no exercise, desk job","lightDesc":"Light exercise 1-3 days/week","moderateDesc":"Moderate exercise 3-5 days/week","activeDesc":"Hard exercise 6-7 days/week","veryActiveDesc":"Very hard exercise & physical job","calculateButton":"Calculate TDEE","result":"Your Daily Calorie Needs","tdeeValue":"TDEE","maintainWeight":"Maintain Weight","mildLoss":"Mild Weight Loss (0.25 kg/week)","moderateLoss":"Weight Loss (0.5 kg/week)","heavyLoss":"Extreme Weight Loss (1 kg/week)","mildGain":"Mild Weight Gain (0.25 kg/week)","kcalPerDay":"kcal/day","guide":{"title":"How to Use","items":["Enter your gender, age, weight, and height.","Select your activity level from the dropdown menu.","Click 'Calculate TDEE' to compute your total energy expenditure.","View the calorie needs for different goals (weight loss, maintenance, gain).","Use the highlighted result corresponding to your selected activity level."]},"knowledge":{"title":"About TDEE","items":[{"title":"What is TDEE?","content":"Total Daily Energy Expenditure (TDEE) represents the total number of calories you burn in a day, taking into account your basal metabolic rate and physical activity level. It is calculated by multiplying your BMR by an activity factor. TDEE is the key number for planning your diet for any fitness goal."},{"title":"Activity Multipliers","content":"Sedentary (×1.2): desk job, little exercise. Lightly active (×1.375): light exercise 1-3 days/week. Moderately active (×1.55): moderate exercise 3-5 days/week. Very active (×1.725): hard exercise 6-7 days/week. Extremely active (×1.9): very hard exercise or physical labor job."},{"title":"Using TDEE for Weight Goals","content":"To lose weight, eat below your TDEE (a 500 kcal deficit = ~0.5 kg/week loss). To maintain weight, eat at TDEE. To gain muscle, eat above TDEE (250–500 kcal surplus). Avoid reducing calories by more than 1000 kcal/day below TDEE, as this can cause muscle loss and metabolic adaptation."},{"title":"Accuracy Limitations","content":"TDEE is an estimate and may vary by ±10-15% depending on individual differences in metabolism, hormones, and activity measurement accuracy. Adjust your calorie intake based on real-world results: if you're not losing/gaining weight as expected, recalculate and adjust by 100-200 kcal increments."}],"featuresTitle":"Key Features","features":["Calculates TDEE for all 5 activity levels simultaneously","Shows calorie targets for weight loss, maintenance, and gain goals","Based on the Mifflin-St Jeor BMR formula","Highlights the result for your selected activity level"]}},"health-walking-calories":{"title":"Walking Calorie Calculator","description":"Calculate calories burned while walking","weight":"Body Weight (kg)","speed":"Walking Speed","slow":"Slow (3 km/h)","normal":"Normal (5 km/h)","fast":"Fast (6.5 km/h)","veryFast":"Very Fast (8 km/h)","inputMode":"Calculate by","byDuration":"Duration","byDistance":"Distance","duration":"Duration","distance":"Distance (km)","minutes":"minutes","calculateButton":"Calculate Calories","result":"Result","caloriesBurned":"Calories Burned","kcal":"kcal","distanceCovered":"Distance Covered","timeTaken":"Time","equivalent":"Calorie Equivalents","equiv_apple":"Apples (80 kcal each)","equiv_banana":"Bananas (90 kcal each)","equiv_coffee":"Lattes (150 kcal each)","equiv_cookie":"Cookies (50 kcal each)","guide":{"title":"How to Use","items":["Enter your body weight in kilograms.","Select your walking speed (slow, normal, fast, or very fast).","Choose whether to calculate by duration or distance.","Enter the duration in minutes or distance in kilometers.","Click 'Calculate Calories' to see how many calories you burned."]},"knowledge":{"title":"About Walking and Calories","items":[{"title":"MET Values for Walking","content":"MET (Metabolic Equivalent of Task) measures exercise intensity relative to rest. Walking MET values: slow walking at 3 km/h = MET 2.5, normal walking at 5 km/h = MET 3.5, brisk walking at 6.5 km/h = MET 4.5, very fast walking at 8 km/h = MET 6.0. Formula: Calories = MET × weight(kg) × time(hours)."},{"title":"Health Benefits of Walking","content":"Regular walking provides substantial health benefits including reduced cardiovascular disease risk, improved blood sugar control, stronger bones and muscles, better mental health, and weight management. The WHO recommends at least 150 minutes of moderate-intensity activity per week. Brisk walking qualifies as moderate intensity."},{"title":"Steps and Calories","content":"The 10,000 steps per day goal is popular but the actual calorie burn depends on pace and body weight. At 5 km/h, a 70 kg person burns approximately 300 kcal per hour. 10,000 steps covers roughly 7–8 km and burns approximately 300–400 kcal for most adults. Even 7,000–8,000 steps daily provides significant health benefits."},{"title":"Maximizing Walking Benefits","content":"Walking uphill increases calorie burn by 3–7 times compared to flat terrain. Adding weight (backpack) increases burn proportionally. Interval walking (alternating fast and slow) can increase overall calorie expenditure. Walking after meals helps with blood sugar control. Morning walks on an empty stomach may enhance fat burning."}],"featuresTitle":"Key Features","features":["MET-based calculations for four walking speeds","Calculate by duration (minutes) or distance (km)","Shows calorie equivalents in everyday food items","Weight-adjusted results for personalized accuracy"]}},"health-water-intake":{"title":"Water Intake Calculator","description":"Calculate your recommended daily water intake","weight":"Body Weight (kg)","activityLevel":"Activity Level","climate":"Climate","temperate":"Temperate","hot":"Hot / Humid","cold":"Cold","sedentary":"Sedentary","light":"Lightly Active","moderate":"Moderately Active","active":"Very Active","calculateButton":"Calculate Water Intake","result":"Your Daily Water Intake","dailyWater":"Recommended Daily Water","liters":"liters","ml":"ml","cups":"cups","glassSize":"Based on 250ml per glass","breakdown":"Breakdown","baseAmount":"Base amount","activityBonus":"Activity bonus","climateNote":"Hot climate adds extra 500ml; cold climate reduces by 200ml","guide":{"title":"How to Use","items":["Enter your body weight in kilograms.","Select your typical daily activity level.","Choose the climate you live in or work in.","Click 'Calculate Water Intake' to get your recommendation.","View your result in both milliliters and number of cups."]},"knowledge":{"title":"About Hydration","items":[{"title":"Why Water Matters","content":"Water makes up about 60% of the human body and is essential for nearly every bodily function. It regulates body temperature, transports nutrients, flushes waste products, lubricates joints, and supports digestion. Even mild dehydration (1–2% of body weight) can impair cognitive performance and physical endurance."},{"title":"Daily Water Needs","content":"The base recommendation is approximately 35 ml per kg of body weight per day. This increases with physical activity, hot weather, illness, pregnancy, and breastfeeding. The popular '8 glasses a day' rule is a simplified guideline, but individual needs vary significantly based on body size and activity."},{"title":"Activity and Climate Effects","content":"Physical activity increases water needs due to sweat loss. Light activity adds ~350 ml, moderate adds ~700 ml, and vigorous exercise can require an additional liter or more. Hot and humid climates also significantly increase sweat loss. During exercise in heat, drink 150–250 ml every 15–20 minutes."},{"title":"Signs of Dehydration","content":"Dark yellow urine is one of the most reliable signs of dehydration. Others include thirst, dry mouth, headache, dizziness, decreased urine output, and fatigue. Severe dehydration can cause rapid heartbeat, confusion, and fainting. Aim for pale yellow urine as an indicator of good hydration."}],"featuresTitle":"Key Features","features":["Personalized calculation based on weight and activity","Adjusts for climate and environmental factors","Shows result in both ml and cups for convenience","Visual cup representation for easy daily tracking"]}},"heicConverter":{"title":"HEIC Converter","description":"Convert Apple HEIC/HEIF photos to JPG or PNG format","uploadTitle":"Upload HEIC/HEIF Image","resultTitle":"Converted Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop an image file","The image will be displayed as a preview after upload","Adjust settings if available (quality, size, etc.)","Click 'Convert' to process the image","Preview the result and check the file size","Click 'Download' to save the converted file","All processing happens in your browser — no uploads"]},"knowledge":{"title":"About HEIC Format","items":[{"title":"What is HEIC/HEIF?","content":"HEIC (High Efficiency Image Container) is Apple's implementation of the HEIF (High Efficiency Image File Format) standard. It uses advanced compression to store photos at roughly half the file size of JPEG while maintaining equivalent quality. iPhones and iPads use HEIC as the default photo format."},{"title":"Why Convert HEIC?","content":"While HEIC offers superior compression, it's not universally supported outside Apple's ecosystem. Windows, Android, and many web applications may not display HEIC files natively. Converting to JPG or PNG ensures your photos can be viewed and shared on any platform."},{"title":"Conversion Quality","content":"When converting HEIC to JPG, you can adjust the quality setting to balance file size and visual quality. For sharing, 80-90% quality typically provides excellent results. Converting to PNG preserves maximum quality but with larger file sizes."},{"title":"Browser Support Note","content":"HEIC conversion in the browser depends on your browser's native HEIC support. Safari on macOS typically supports HEIC natively. For browsers without native support, consider using a desktop application for conversion."}],"featuresTitle":"Features","features":["Convert HEIC/HEIF to JPG or PNG","Adjustable output quality","Browser-based processing when supported","No server upload required"],"applicationsTitle":"Use Cases","applications":["Sharing iPhone photos on Windows/Android","Preparing HEIC photos for web upload","Converting HEIC for email attachments","Making Apple photos compatible with older software"]}},"hexCalculator":{"seoTitle":"Hexadecimal Calculator | Add, Subtract, Multiply - TE Cyber","seoDescription":"Free online hexadecimal calculator. Perform addition, subtraction, multiplication, and division on hex numbers easily.","title":"Hex Calculator","description":"Calculate hexadecimal (base-16) numbers using basic mathematical operations.","hexA":"Hex Number A","hexB":"Hex Number B","operation":"Operation","add":"Addition (+)","subtract":"Subtraction (-)","multiply":"Multiplication (×)","divide":"Division (÷)","calculate":"Calculate","clear":"Clear","result":"Hex Result","decimalResult":"Decimal Result","invalidInput":"Please enter valid hex numbers (0-9, A-F).","divideByZero":"Division by zero is not allowed.","guide":{"title":"How to Use","items":["Enter the first hex number in the first field (e.g., 1A4).","Select the mathematical operation (+, -, ×, ÷).","Enter the second hex number in the second field (e.g., F2).","Click 'Calculate' to see the result in both hex and decimal forms."]},"knowledge":{"title":"About Hexadecimal Math","introduction":"The hexadecimal numeral system uses 16 symbols: 0-9 and A-F. It is widely used in computing as a human-friendly representation of binary values.","items":[{"title":"Hex Addition","content":"Add bits column by column. If the sum exceeds 15 (F), subtract 16 and carry over 1 to the next column."},{"title":"Hex to Binary Relationship","content":"One hexadecimal digit exactly represents four binary digits (bits), also known as a nibble. This makes hex to binary conversion direct and efficient."}],"featuresTitle":"Key Concepts","features":["Base-16 numbering system.","The letters A, B, C, D, E, F represent 10, 11, 12, 13, 14, 15 respectively.","Typically prefixed with '0x' in programming languages like C and JavaScript."],"applicationsTitle":"Applications","applications":["Memory addressing and debugging.","HTML/CSS web colors (e.g., #FFFFFF).","Encoding text and files (e.g., base16/hex dumps)."]}},"hexEncoder":{"convert":{"title":"Hex Encoder/Decoder","input":"Input","output":"Output","textToHex":"Text to Hex","hexToText":"Hex to Text","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text or hex to convert...","outputPlaceholder":"Result will be displayed here...","hexFormat":"Hex Format","uppercase":"Uppercase","formats":{"plain":"Plain (Continuous)","spaced":"Spaced","prefixed":"0x Prefixed","array":"Byte Array"}},"error":{"invalidHex":"Invalid Hexadecimal Input","decodeFailed":"Decoding Failed"},"guide":{"title":"Instructions","items":["Convert text to hexadecimal representation and vice versa","Supports various formatting options like spacing and prefixes","Input spaces and common separators are automatically ignored when decoding"]},"knowledge":{"title":"Hexadecimal Knowledge","items":[{"title":"What is Hexadecimal?","content":"Hexadecimal is a base-16 numeral system using digits 0-9 and letters A-F to represent values."},{"title":"Why use Hex?","content":"It provides a human-friendly representation of binary values. One hex digit represents exactly 4 bits (one nibble)."}],"featuresTitle":"Key Features","features":["Compact representation of binary data","Standard for color codes, memory addresses, and file dumps","Case-insensitive input handling"],"applicationsTitle":"Common Applications","applications":["Debugging and memory analysis","Color specification in web design","Network packet inspection","Cryptography and data encoding"]}},"hmac":{"title":"HMAC Calculator","button":"Calculate HMAC","algorithmInfo":"{bits} bits/{chars} characters","algorithms":{"HMAC-MD5":"128-bit HMAC-MD5 algorithm for message authentication code generation","HMAC-SHA1":"160-bit HMAC-SHA1 algorithm providing basic message integrity verification","HMAC-SHA224":"224-bit HMAC-SHA224 algorithm, member of the SHA-2 family","HMAC-SHA256":"256-bit HMAC-SHA256 algorithm, currently the most widely used HMAC algorithm","HMAC-SHA384":"384-bit HMAC-SHA384 algorithm providing stronger security guarantees","HMAC-SHA512":"512-bit HMAC-SHA512 algorithm, the longest SHA-2 series HMAC algorithm","HMAC-SHA3-224":"224-bit HMAC-SHA3 algorithm, new generation HMAC standard","HMAC-SHA3-256":"256-bit HMAC-SHA3 algorithm, next-generation standard to replace SHA-2","HMAC-SHA3-384":"384-bit HMAC-SHA3 algorithm providing higher level of security","HMAC-SHA3-512":"512-bit HMAC-SHA3 algorithm, most secure version in the SHA-3 family","HMAC-RIPEMD160":"160-bit HMAC-RIPEMD160 algorithm for special-case message authentication"},"otherAlgorithms":"Other HMAC Algorithms","resultPlaceholder":"HMAC result will be shown here","case":{"upper":"Upper","lower":"Lower"},"error":{"emptyInput":"Please enter both text and secret key","calculation":"Error occurred while calculating HMAC"},"knowledge":{"title":"HMAC Knowledge","items":[{"title":"What is HMAC?","content":"HMAC is a keyed-hash message authentication code that combines a hash function with a secret key."},{"title":"Security","content":"HMAC security depends on the strength of the hash function and the secrecy of the key."},{"title":"HMAC-MD5","content":"HMAC implementation based on MD5, generating 128-bit (16-byte) authentication codes. While the underlying MD5 algorithm has security concerns, it's still considered secure within the HMAC construction. Suitable for scenarios requiring fast processing."},{"title":"HMAC-SHA1","content":"HMAC implementation based on SHA-1, generating 160-bit (20-byte) authentication codes. Although SHA-1 itself is no longer recommended for digital signatures, it remains secure when used in HMAC."},{"title":"HMAC-SHA224","content":"HMAC implementation based on SHA-224, generating 224-bit (28-byte) authentication codes. Member of the SHA-2 family, providing higher security than SHA-1. Suitable for scenarios requiring both performance and security."},{"title":"HMAC-SHA256","content":"HMAC implementation based on SHA-256, generating 256-bit (32-byte) authentication codes. Currently the most widely used HMAC algorithm, employed in TLS, SSH, and other security protocols. Provides a good balance of security and performance."},{"title":"HMAC-SHA384","content":"HMAC implementation based on SHA-384, generating 384-bit (48-byte) authentication codes. Provides stronger security guarantees than SHA-256, suitable for enterprise applications requiring higher security levels."},{"title":"HMAC-SHA512","content":"HMAC implementation based on SHA-512, generating 512-bit (64-byte) authentication codes. The most secure version in the SHA-2 family, suitable for scenarios with extremely high security requirements."},{"title":"HMAC-SHA3-224","content":"HMAC implementation based on SHA3-224, generating 224-bit (28-byte) authentication codes. Uses the next-generation SHA-3 hash standard, providing different security characteristics than SHA-2."},{"title":"HMAC-SHA3-256","content":"HMAC implementation based on SHA3-256, generating 256-bit (32-byte) authentication codes. The most commonly used version in the SHA-3 standard, designed to replace the SHA-2 series."},{"title":"HMAC-SHA3-384","content":"HMAC implementation based on SHA3-384, generating 384-bit (48-byte) authentication codes. High-strength version of the SHA-3 family, suitable for applications requiring long-term security guarantees."},{"title":"HMAC-SHA3-512","content":"HMAC implementation based on SHA3-512, generating 512-bit (64-byte) authentication codes. The most secure version in the SHA-3 family, providing the highest level of security protection."},{"title":"HMAC-RIPEMD160","content":"HMAC implementation based on RIPEMD160, generating 160-bit (20-byte) authentication codes. Provides unique security characteristics, used in specific scenarios."}],"applications":{"title":"Common Applications","items":["API request signing","Data integrity verification","Message authentication","Session token generation","Digital signatures"]}},"clearInput":"Clear Input","clearKey":"Clear Key","messageFormat":"Message Format","keyFormat":"Key Format","messagePlaceholder":{"utf8":"Enter message to hash...","hex":"Enter hexadecimal message data (e.g., 48656C6C6F)..."},"keyPlaceholder":{"utf8":"Enter secret key...","hex":"Enter hexadecimal key (e.g., 6B6579)..."}},"htmlEncoder":{"title":"HTML Entity Encoder/Decoder","description":"Convert special characters to HTML entities and vice versa","convert":{"title":"HTML Encode/Decode","input":"Input","output":"Output","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will be displayed here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","encodeMode":"Encode Mode","encodeModes":{"named":"Named Entity","decimal":"Decimal","hex":"Hexadecimal"}},"guide":{"title":"Instructions","items":["Encode: Convert special characters to HTML entities (e.g. < becomes <)","Decode: Convert HTML entities back to characters","Supports named entities, decimal, and hexadecimal formats"]},"reference":{"title":"Common HTML Entities Reference","character":"Char","named":"Named","decimal":"Decimal","hex":"Hex","description":"Description","descriptions":{"lessThan":"Less Than","greaterThan":"Greater Than","ampersand":"Ampersand","doubleQuote":"Double Quote","singleQuote":"Single Quote","nbsp":"Non-breaking Space","copyright":"Copyright","registered":"Registered Symbol","trademark":"Trademark","euro":"Euro Sign"}},"knowledge":{"title":"HTML Entities Knowledge","items":[{"title":"What is HTML Entities?","content":"HTML entities are pieces of text that begin with an ampersand (&) and end with a semicolon (;). They are used to display reserved characters (which would otherwise be interpreted as HTML code) and invisible characters."},{"title":"Common Entities","content":"< (<), > (>), & (&), \" ("), ' ('), Space ( )"}],"featuresTitle":"Key Features","features":["Prevents XSS attacks by escaping user input","Displays characters not present in standard keyboard","Ensures correct rendering of reserved characters"],"applicationsTitle":"Common Applications","applications":["Web development and debugging","Content management systems","Data sanitization","Email template creation"]}},"htmlFormatter":{"title":"HTML Formatter & Minifier","description":"Format and beautify HTML code, or minify it for production.","format":"Format HTML","minify":"Minify HTML","clear":"Clear","history":"History","copy":"Copy","copied":"Copied!","darkTheme":"Dark Theme","formatSuccess":"Formatted successfully","formatError":"Formatting failed","minifySuccess":"Minified successfully","minifyError":"Minification failed","guide":{"title":"How to use","items":["Paste your HTML code into the editor.","Click 'Format HTML' to beautify and indent the code.","Click 'Minify HTML' to remove whitespace and comments.","Use the copy button to copy the result.","Access previous versions from the History menu."]},"knowledge":{"title":"About HTML Formatting","introduction":"HTML (HyperText Markup Language) formatting involves organizing code structure with proper indentation and spacing to improve readability. Minification does the opposite by removing unnecessary characters to reduce file size.","items":[{"title":"Why Format HTML?","content":"Formatted HTML is easier to read, debug, and maintain. Proper indentation helps visualize the document structure and nesting of elements."},{"title":"What is Minification?","content":"Minification removes whitespace, newlines, and comments from the code. This reduces the file size, leading to faster page load times and reduced bandwidth usage."}],"featuresTitle":"Key Features","features":["Prettier-based formatting for industry-standard results","Smart indentation and attribute wrapping","Safe minification that preserves functionality","Syntax highlighting","Local history to prevent data loss"],"applicationsTitle":"Common Applications","applications":["Debugging complex HTML structures","Preparing code for production deployment","Cleaning up generated code","Learning HTML structure and best practices"]}},"htpasswdGenerator":{"title":"Htpasswd Generator","description":"Generate secure Basic Auth entries for .htpasswd files (Apache/Nginx).","configuration":"Configuration","username":"Username","password":"Password","algorithm":"Algorithm","generate":"Generate","result":"Result","copy":"Copy","copied":"Copied to clipboard","guide":{"title":"How to use","items":["Enter the username for the account.","Enter the password to be hashed.","Select the hashing algorithm (Bcrypt is recommended for modern systems).","Click 'Generate' and copy the resulting line to your .htpasswd file."]}},"httpHeaders":{"title":"HTTP Headers","description":"Inspect the HTTP headers returned by a web server.","input":"URL","inputPlaceholder":"Enter a URL (e.g., https://google.com)","getHeaders":"Get Headers","loading":"Fetching headers...","error":"Failed to fetch headers. Please check the URL and try again.","results":{"title":"Response Headers","status":"Status Code","name":"Header Name","value":"Value"},"guide":{"title":"How to use HTTP Headers Tool","items":["Enter a full URL (starting with http:// or https://) in the input field.","Click the 'Get Headers' button.","Review the status code and list of response headers returned by the server."]},"knowledge":{"title":"About HTTP Headers","items":[{"title":"What are HTTP Headers?","content":"HTTP headers let the client and the server pass additional information with an HTTP request or response."},{"title":"Response Headers","content":"Response headers hold additional information about the response, like its location or about the server providing it."}],"featuresTitle":"Features","features":["View all response headers","Check HTTP status codes","Identify server software and technologies"],"applicationsTitle":"Applications","applications":["Debugging web server configuration","Checking cache headers","Analyzing security headers","Verifying redirects"]}},"httpRequestTester":{"title":"HTTP Request Tester","description":"Test HTTP requests (GET, POST, PUT, DELETE, etc.) and view the response.","input":{"urlLabel":"URL","urlPlaceholder":"https://api.example.com","methodLabel":"Method","bodyLabel":"Request Body (JSON)","headersLabel":"Headers (JSON)","button":"Send Request"},"result":{"status":"Status","time":"Time (ms)","size":"Size (bytes)","headers":"Response Headers","body":"Response Body","error":"Error"},"guide":{"title":"How to use HTTP Request Tester","items":["Select the HTTP method (GET, POST, etc.).","Enter the target URL.","Optionally add request headers and body (for POST/PUT).","Click 'Send Request' to execute the call and view the response."]},"knowledge":{"title":"About HTTP Requests","items":[{"title":"HTTP Methods","content":"GET retrieves data, POST submits data, PUT updates data, and DELETE removes data."},{"title":"Status Codes","content":"2xx (Success), 3xx (Redirection), 4xx (Client Error), 5xx (Server Error)."},{"title":"Headers","content":"Headers provide metadata about the request or response, such as Content-Type or Authorization."}]}},"httpStatusCodes":{"title":"HTTP Status Codes","description":"A comprehensive list of HTTP status codes with descriptions.","searchPlaceholder":"Search by code or description...","types":{"info":"Informational","success":"Success","redirect":"Redirection","clientError":"Client Error","serverError":"Server Error","unknown":"Unknown"},"codes":{"100":{"title":"Continue","description":"The server has received the request headers and the client should proceed to send the request body."},"101":{"title":"Switching Protocols","description":"The requester has asked the server to switch protocols and the server has agreed to do so."},"102":{"title":"Processing","description":"The server has received and is processing the request, but no response is available yet."},"103":{"title":"Early Hints","description":"Used to return some response headers before final HTTP message."},"200":{"title":"OK","description":"Standard response for successful HTTP requests."},"201":{"title":"Created","description":"The request has been fulfilled, resulting in the creation of a new resource."},"202":{"title":"Accepted","description":"The request has been accepted for processing, but the processing has not been completed."},"203":{"title":"Non-Authoritative Information","description":"The server is a transforming proxy (e.g. a Web accelerator) that received a 200 OK from its origin, but is returning a modified version of the origin's response."},"204":{"title":"No Content","description":"The server successfully processed the request and is not returning any content."},"205":{"title":"Reset Content","description":"The server successfully processed the request, but is not returning any content. Unlike a 204 response, this response requires that the requester reset the document view."},"206":{"title":"Partial Content","description":"The server is delivering only part of the resource (byte serving) due to a range header sent by the client."},"207":{"title":"Multi-Status","description":"The message body that follows is by default an XML message and can contain a number of separate response codes, depending on how many sub-requests were made."},"208":{"title":"Already Reported","description":"The members of a DAV binding have already been enumerated in a preceding part of the (multistatus) response, and are not being included again."},"226":{"title":"IM Used","description":"The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance."},"300":{"title":"Multiple Choices","description":"Indicates multiple options for the resource from which the client may choose."},"301":{"title":"Moved Permanently","description":"This and all future requests should be directed to the given URI."},"302":{"title":"Found","description":"Tells the client to look at (browse to) another URL."},"303":{"title":"See Other","description":"The response to the request can be found under another URI using the GET method."},"304":{"title":"Not Modified","description":"Indicates that the resource has not been modified since the version specified by the request headers."},"305":{"title":"Use Proxy","description":"The requested resource is available only through a proxy, the address for which is provided in the response."},"306":{"title":"Switch Proxy","description":"No longer used. Originally meant 'Subsequent requests should use the specified proxy'."},"307":{"title":"Temporary Redirect","description":"In this case, the request should be repeated with another URI; however, future requests should still use the original URI."},"308":{"title":"Permanent Redirect","description":"The request and all future requests should be repeated using another URI."},"400":{"title":"Bad Request","description":"The server cannot or will not process the request due to an apparent client error."},"401":{"title":"Unauthorized","description":"Authentication is required and has failed or has not yet been provided."},"402":{"title":"Payment Required","description":"Reserved for future use. The original intention was that this code might be used as part of some form of digital cash or micropayment scheme."},"403":{"title":"Forbidden","description":"The request was valid, but the server is refusing action."},"404":{"title":"Not Found","description":"The requested resource could not be found but may be available in the future."},"405":{"title":"Method Not Allowed","description":"A request method is not supported for the requested resource."},"406":{"title":"Not Acceptable","description":"The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request."},"407":{"title":"Proxy Authentication Required","description":"The client must first authenticate itself with the proxy."},"408":{"title":"Request Timeout","description":"The server timed out waiting for the request."},"409":{"title":"Conflict","description":"Indicates that the request could not be processed because of conflict in the current state of the resource."},"410":{"title":"Gone","description":"Indicates that the resource requested is no longer available and will not be available again."},"411":{"title":"Length Required","description":"The request did not specify the length of its content, which is required by the requested resource."},"412":{"title":"Precondition Failed","description":"The server does not meet one of the preconditions that the requester put on the request header fields."},"413":{"title":"Payload Too Large","description":"The request is larger than the server is willing or able to process."},"414":{"title":"URI Too Long","description":"The URI provided was too long for the server to process."},"415":{"title":"Unsupported Media Type","description":"The request entity has a media type which the server or resource does not support."},"416":{"title":"Range Not Satisfiable","description":"The client has asked for a portion of the file, but the server cannot supply that portion."},"417":{"title":"Expectation Failed","description":"The server cannot meet the requirements of the Expect request-header field."},"418":{"title":"I'm a teapot","description":"The server refuses the attempt to brew coffee with a teapot."},"421":{"title":"Misdirected Request","description":"The request was directed at a server that is not able to produce a response."},"422":{"title":"Unprocessable Entity","description":"The request was well-formed but was unable to be followed due to semantic errors."},"423":{"title":"Locked","description":"The resource that is being accessed is locked."},"424":{"title":"Failed Dependency","description":"The request failed due to failure of a previous request."},"425":{"title":"Too Early","description":"Indicates that the server is unwilling to risk processing a request that might be replayed."},"426":{"title":"Upgrade Required","description":"The client should switch to a different protocol such as TLS/1.0, given in the Upgrade header field."},"428":{"title":"Precondition Required","description":"The origin server requires the request to be conditional."},"429":{"title":"Too Many Requests","description":"The user has sent too many requests in a given amount of time."},"431":{"title":"Request Header Fields Too Large","description":"The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large."},"451":{"title":"Unavailable For Legal Reasons","description":"A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource."},"500":{"title":"Internal Server Error","description":"A generic error message, given when an unexpected condition was encountered and no more specific message is suitable."},"501":{"title":"Not Implemented","description":"The server either does not recognize the request method, or it lacks the ability to fulfil the request."},"502":{"title":"Bad Gateway","description":"The server was acting as a gateway or proxy and received an invalid response from the upstream server."},"503":{"title":"Service Unavailable","description":"The server is currently unavailable (because it is overloaded or down for maintenance)."},"504":{"title":"Gateway Timeout","description":"The server was acting as a gateway or proxy and did not receive a timely response from the upstream server."},"505":{"title":"HTTP Version Not Supported","description":"The server does not support the HTTP protocol version used in the request."},"506":{"title":"Variant Also Negotiates","description":"Transparent content negotiation for the request results in a circular reference."},"507":{"title":"Insufficient Storage","description":"The server is unable to store the representation needed to complete the request."},"508":{"title":"Loop Detected","description":"The server detected an infinite loop while processing the request."},"510":{"title":"Not Extended","description":"Further extensions to the request are required for the server to fulfil it."},"511":{"title":"Network Authentication Required","description":"The client needs to authenticate to gain network access."}}},"icoConverter":{"title":"ICO Converter","description":"Convert images to ICO format for website favicons","uploadTitle":"Upload Image","resultTitle":"Converted ICO Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop an image file","The image will be displayed as a preview after upload","Adjust settings if available (quality, size, etc.)","Click 'Convert' to process the image","Preview the result and check the file size","Click 'Download' to save the converted file","All processing happens in your browser — no uploads"]},"knowledge":{"title":"About ICO Format","items":[{"title":"What is ICO?","content":"ICO (Icon) is an image format used for icons in Microsoft Windows and website favicons. ICO files can contain multiple images at different sizes and color depths, allowing the operating system or browser to select the most appropriate version for display."},{"title":"Favicon Usage","content":"Website favicons are small icons displayed in browser tabs, bookmarks, and address bars. Most websites use ICO format for maximum browser compatibility. The standard favicon sizes are 16x16, 32x32, and 48x48 pixels, with 32x32 being the most common."},{"title":"Size Requirements","content":"For website favicons, 32x32 pixels is the recommended standard size. This converter automatically resizes your image to create a properly sized icon. For best results, use a square source image with clear, simple graphics."},{"title":"Modern Alternatives","content":"While ICO remains important for compatibility, modern websites can also use PNG or SVG favicons. However, ICO is still recommended as a fallback for older browsers. This tool creates PNG-based favicons at the standard 32x32 size."}],"featuresTitle":"Features","features":["Convert any image to favicon ICO format","Automatic resizing to standard 32x32","Suitable for website favicon creation","Browser-based with no upload needed"],"applicationsTitle":"Use Cases","applications":["Creating website favicons from logos","Converting PNG icons to ICO format","Generating favicons for web development","Making Windows application icons"]}},"ieeeFloatConverter":{"title":"IEEE 754 Float Converter","description":"Professional IEEE 754 standard floating-point format conversion tool","floatInput":"Float Input","floatPlaceholder":"Enter floating-point number, e.g.: 3.14159","binaryInput":"Binary Input","binaryPlaceholder":"Enter 32-bit or 64-bit binary, e.g.: 01000000010010010000111111011011","precision":"Precision","singlePrecision":"Single Precision (32-bit)","doublePrecision":"Double Precision (64-bit)","convertButton":"Convert","result":"Conversion Result","binaryResult":"Binary Representation","floatResult":"Float Value","breakdown":"Bit Field Breakdown","signBit":"Sign Bit","exponentBits":"Exponent Bits","mantissaBits":"Mantissa Bits","copyBinary":"Copy Binary","copyFloat":"Copy Float","clearAll":"Clear All","invalidFloat":"Invalid floating-point format","invalidBinary":"Invalid binary format","guide":{"title":"Usage Guide","items":["Select floating-point precision (single precision 32-bit or double precision 64-bit)","Method 1: Enter floating-point number to view its binary representation","Method 2: Enter binary code to convert to floating-point number","View detailed bit field breakdown (sign bit, exponent bits, mantissa bits)","Copy conversion results to clipboard"]},"knowledge":{"title":"IEEE 754 Standard Knowledge","items":[{"title":"IEEE 754 Standard Introduction","content":"IEEE 754 is a floating-point arithmetic standard that defines floating-point formats, operation rules, exception handling, etc. This standard is widely used in computer systems, ensuring consistency of floating-point operations across different systems."},{"title":"Single Precision Float (32-bit)","content":"Single precision floating-point uses 32 bits: 1 sign bit, 8 exponent bits (biased by 127), 23 mantissa bits. Value range is approximately ±1.18×10⁻³⁸ to ±3.40×10³⁸, with precision of about 7 decimal digits."},{"title":"Double Precision Float (64-bit)","content":"Double precision floating-point uses 64 bits: 1 sign bit, 11 exponent bits (biased by 1023), 52 mantissa bits. Value range is approximately ±2.23×10⁻³⁰⁸ to ±1.80×10³⁰⁸, with precision of about 15-16 decimal digits."},{"title":"Special Values","content":"IEEE 754 defines special values: positive and negative zero, positive and negative infinity, NaN (Not a Number). These special values handle special cases like division by zero, overflow, undefined operations."},{"title":"Application Scenarios","content":"In programming debugging, numerical computation, embedded development, graphics processing, understanding binary representation of floating-point numbers is crucial for analyzing precision issues and optimizing algorithm performance."}]},"systems":{"singleFloat":"Single Precision Float (32-bit)","doubleFloat":"Double Precision Float (64-bit)","binaryRepresentation":"Binary Representation"}},"image-color-picker":{"title":"Image Color Picker","description":"Accurately extract colors from any position of an uploaded image.","upload":"Upload Image","dropzone":"Click or drag image here to upload","selectedColor":"Selected Color","hex":"HEX","rgb":"RGB","magnifier":"Magnifier","guide":{"title":"Usage Guide","items":["Click to upload or drag an image into the area.","Move the mouse over the image to see pixel details in the magnifier.","Click any position on the image to lock the color value.","The detailed color codes will be displayed below."]},"knowledge":{"title":"How it works","items":[{"title":"Pixel Sampling","content":"Uses HTML5 Canvas to access image data and read the RGBA components of the pixel at the mouse click location."}]}},"imageBase64":{"title":"Image ↔ Base64","description":"Convert image files to Data URI Base64 or decode Base64 strings to images","modeImageToBase64":"Image to Base64","modeBase64ToImage":"Base64 to Image","uploadTitle":"Upload Image","stringTitle":"Paste Base64 String","resultPrefix":"Includes dataURI prefix","rawBase64":"Raw Base64 string","copyToClipboard":"Copy to Clipboard","clearText":"Clear Text","invalidString":"Invalid Base64 image string format","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]}},"imageBlur":{"title":"Image Blur Effect","description":"Apply dynamic Gaussian blur to your pictures","uploadTitle":"Upload Image","blurRadius":"Blur Radius (px)","resultTitle":"Blurred Image","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]}},"imageCompare":{"title":"Image Compare","description":"Image Compare is used to process images.","uploadTitle":"Upload Image","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Image Compare","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"uploadFirst":"Upload First Image","uploadSecond":"Upload Second Image","uploadBefore":"Upload 'Before' Image","uploadAfter":"Upload 'After' Image","comparison":"Image Comparison","sliderHint":"Drag the slider or hover to compare before and after."},"imageCompress":{"title":"Image Compressor","description":"Drastically reduce image file sizes for faster loading speeds","uploadTitle":"Upload Image","settingsTitle":"Compression Settings","quality":"Target Quality","currentSize":"Original Size","newSize":"Compressed Size","resultTitle":"Compressed Image","saving":"Saved Volume","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]}},"imageCrop":{"title":"Image Cropper","description":"Select and crop a specific area from your image","uploadTitle":"Upload Image","settingsTitle":"Crop Options","freeRatio":"Free Ratio","square11":"Square 1:1","ratio169":"16:9","ratio43":"4:3","resultTitle":"Cropped Result","applyCrop":"Apply Crop","resetCrop":"Reset","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]},"interactiveWorkspace":"Interactive Crop Workspace","selectAspectRatio":"Select Aspect Ratio"},"imageDimensions":{"title":"Image Dimensions","description":"Image Dimensions is used to process images.","uploadTitle":"Upload Image to View Dimensions","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Image Dimensions","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"imageDimensions":"Image Dimensions","totalPixels":"Total Pixels","fileMetaTags":"File Meta Tags","fileName":"File Name","fileType":"File Type","fileSize":"File Size"},"imageGrayscale":{"title":"Image to Grayscale","description":"Desaturate your image making it purely black and white","uploadTitle":"Upload Color Image","resultTitle":"Black & White Image","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]}},"imageInvert":{"title":"Invert Image Colors","description":"Reverse RGB vectors to create a photonegative visual effect","uploadTitle":"Upload Image","resultTitle":"Inverted Result","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]}},"imagePixelate":{"title":"Image Pixelate","description":"Image Pixelate is used to process images.","uploadTitle":"Upload Image to Pixelate","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Image Pixelate","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"settings":"Pixelation Settings","blockSize":"Block Size","detailHint":"Larger block size = more pixelated","apply":"Download Image"},"imageResize":{"title":"Image Resizer","description":"Resize images to exact dimensions or by scale percentage","uploadTitle":"Upload Image","settingsTitle":"Resize Settings","width":"Width","height":"Height","maintainAspectRatio":"Maintain Aspect Ratio","percentage":"Scale (%)","resultTitle":"Resized Image","modeValue":"By Values","modePercentage":"By Percentage","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]},"originalSize":"Original","targetSize":"Target"},"imageRotate":{"title":"Image Rotate & Flip","description":"Rotate by 90-degree increments, custom angles, or flip horizontally/vertically","uploadTitle":"Upload Image","controlsTitle":"Transform Controls","rotateLeft":"Rotate Left","rotateRight":"Rotate Right","flipHorizontal":"Flip Horizontal","flipVertical":"Flip Vertical","resultTitle":"Transformed Result","guide":{"title":"How to Use","items":["Upload an image using drag & drop or click","Adjust the respective parameters on the dashboard","Click process/apply if needed to see the generated preview","Use the 'Download' button to save your file securely in the browser"]},"knowledge":{"title":"About this Feature","items":[{"title":"Privacy Guaranteed","content":"HTML5 Canvas does all visual computing heavily inside your own computing environment which guarantees that user items never physically touch an external remote network."}],"featuresTitle":"Features","features":["100% privacy","High Performance canvas handling"],"applicationsTitle":"Uses","applications":["Daily digital life utilities","Web Development asset preparation"]},"transformPreview":"Transform Preview","clearImage":"Clear Image"},"imageWatermark":{"title":"Image Watermark","description":"Image Watermark is used to process images.","uploadTitle":"Upload Image to Add Watermark","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Image Watermark","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"watermarkText":"Watermark Text","apply":"Apply Watermark & Download","settings":"Watermark Settings","fontSize":"Font Size","opacity":"Opacity","rotation":"Rotation (Degrees)","color":"Text Color","position":"Position","repeat":"Repeat Pattern","tiledDensity":"Tiled Gap","dragHint":"Drag directly on the preview area to customize watermark position.","modeCustom":"Custom (Drag to position)","modeTiled":"Tiled (Drag to position)"},"ipConverter":{"title":"IP Converter","description":"Convert between IP address, Decimal, and Binary formats.","input":"IP Address, Decimal, or Binary","inputPlaceholder":"Enter IP (192.168.1.1), Decimal (3232235777), or Binary (11000000...)","convert":"Convert","error":"Invalid format. Please enter a valid IPv4 address, decimal integer, or binary string.","results":{"title":"Conversion Results","ip":"IP Address","decimal":"Decimal Value","binary":"Binary Representation"},"guide":{"title":"How to use IP Converter","items":["Enter an IP address, a decimal number, or a binary string in the input field.","The tool will automatically detect the format.","Click 'Convert' to see the other representations."]},"knowledge":{"title":"About IP Conversion","items":[{"title":"Universal Format","content":"IPv4 addresses can be represented in multiple formats. Dotted-decimal (192.168.1.1) is for humans, while computers use the 32-bit binary or integer value."},{"title":"IP to Decimal","content":"(Octet1 * 256^3) + (Octet2 * 256^2) + (Octet3 * 256) + Octet4."},{"title":"Decimal to IP","content":"Reverse the process by dividing the integer by powers of 256 to extract each octet."}],"featuresTitle":"Features","features":["Auto-detection of input format","Bidirectional conversion","Supports IP, Decimal, and Binary"],"applicationsTitle":"Applications","applications":["Network configuration and debugging","Database storage optimization","Educational purposes"]}},"ipLookup":{"title":"IP Lookup","description":"Look up detailed information about any IP address including location, ISP, and ASN.","input":"IP Address","inputPlaceholder":"Enter an IP address (e.g., 8.8.8.8)","lookup":"Lookup","loading":"Looking up...","error":"Failed to look up IP address. Please check the input and try again.","myIp":"Use My IP","results":{"title":"Lookup Results","ip":"IP Address","type":"IP Type","continent":"Continent","country":"Country","region":"Region","city":"City","latitude":"Latitude","longitude":"Longitude","postal":"Postal Code","timezone":"Timezone","isp":"ISP","org":"Organization","asn":"ASN"},"guide":{"title":"How to use IP Lookup","items":["Enter an IPv4 or IPv6 address in the input field.","Click the 'Lookup' button to retrieve information.","View details such as geographic location, ISP, and timezone."]},"knowledge":{"title":"About IP Geolocation","items":[{"title":"Accuracy","content":"IP geolocation is not 100% accurate. It maps IP addresses to geographic locations based on databases maintained by various providers. City-level accuracy is usually good, but pinpoint accuracy is not guaranteed."},{"title":"ASN (Autonomous System Number)","content":"An ASN is a unique number assigned to an Autonomous System (AS) by IANA. An AS is a collection of connected IP routing prefixes under the control of one or more network operators."}],"featuresTitle":"Key Features","features":["Support for IPv4 and IPv6","Detailed geographic information","ISP and Organization detection","Timezone information"],"applicationsTitle":"Common Uses","applications":["Verifying user locations","Analyzing web traffic sources","Detecting fraud and suspicious activity","Network troubleshooting"]}},"ipRangeCalculator":{"title":"IP Range Calculator","description":"Calculate the total hosts and CIDR blocks between a Start and End IP address.","startIp":"Start IP Address","endIp":"End IP Address","placeholder":"e.g., 192.168.1.1","calculate":"Calculate","error":"Invalid IP address range. Start IP must be less than or equal to End IP.","results":{"title":"Calculation Results","totalHosts":"Total Host Count","cidrBlocks":"CIDR Blocks"},"guide":{"title":"How to use IP Range Calculator","items":["Enter the starting IPv4 address in the first field.","Enter the ending IPv4 address in the second field.","Click 'Calculate' to see the number of hosts and the CIDR blocks that cover this range."]},"knowledge":{"title":"About IP Ranges","items":[{"title":"IP Range","content":"An IP range is a contiguous block of IP addresses defined by a start and end address. It can often be represented by one or more CIDR blocks."},{"title":"CIDR Aggregation","content":"CIDR aggregation is the process of combining valid adjacent network blocks into a single larger block, or representing a range as a minimal set of CIDR blocks."}],"featuresTitle":"Features","features":["Calculate total IP count","Convert Range to CIDR list","Input validation"],"applicationsTitle":"Applications","applications":["Network auditing","Firewall rule creation","IP allocation planning"]}},"ipToBinary":{"title":"IP to Binary Converter","description":"Convert an IPv4 address to its 32-bit binary representation.","input":"IP Address","inputPlaceholder":"Enter an IP address (e.g., 192.168.1.1)","convert":"Convert","error":"Invalid IP address. Please enter a valid IPv4 address.","results":{"title":"Binary Representation","binary":"Binary","decimal":"Decimal Value"},"guide":{"title":"How to use IP to Binary Converter","items":["Enter a valid IPv4 address in the input field.","Click the 'Convert' button.","View the binary representation of each octet and the full 32-bit binary string."]},"knowledge":{"title":"About IP to Binary","items":[{"title":"IPv4 Structure","content":"An IPv4 address consists of 32 bits, divided into 4 octets of 8 bits each."},{"title":"Binary Conversion","content":"Each decimal octet (0-255) is converted to an 8-digit binary number. For example, 192 becomes 11000000."}],"featuresTitle":"Features","features":["Instant conversion","Breakdown by octet","Full 32-bit view"],"applicationsTitle":"Applications","applications":["Subnetting calculations","Network engineering","Understanding IP structure"]}},"ipToDecimal":{"title":"IP to Decimal Converter","description":"Convert an IPv4 address to its decimal (integer) representation.","input":"IP Address","inputPlaceholder":"Enter an IP address (e.g., 192.168.1.1)","convert":"Convert","error":"Invalid IP address. Please enter a valid IPv4 address.","results":{"title":"Decimal Representation","decimal":"Decimal Value","binary":"Binary Value"},"guide":{"title":"How to use IP to Decimal Converter","items":["Enter a valid IPv4 address in the input field.","Click the 'Convert' button.","View the decimal integer representation of the IP address."]},"knowledge":{"title":"About IP to Decimal","items":[{"title":"Decimal IP","content":"An IPv4 address is essentially a 32-bit number. It is usually represented in dot-decimal notation for readability, but computers process it as a single integer."},{"title":"Conversion Logic","content":"To convert IP to decimal: (first octet * 256^3) + (second octet * 256^2) + (third octet * 256) + (fourth octet)."}],"featuresTitle":"Features","features":["Instant conversion","Accurate integer calculation","Copy result to clipboard"],"applicationsTitle":"Applications","applications":["Database storage (storing IPs as integers is more efficient)","IP range calculations","Network programming"]}},"ipv4ToIpv6":{"title":"IPv4 to IPv6 Converter","description":"Convert an IPv4 address to its IPv6 mapped representation.","input":"IP Address","inputPlaceholder":"Enter an IPv4 address (e.g., 192.168.1.1)","convert":"Convert","error":"Invalid IPv4 address. Please enter a valid address.","results":{"title":"IPv6 Representation","ipv6":"IPv6 Address","short":"Short Notation","long":"Long Notation"},"guide":{"title":"How to use IPv4 to IPv6 Converter","items":["Enter a valid IPv4 address in the input field.","Click the 'Convert' button.","View the standard and compressed IPv6 representations."]},"knowledge":{"title":"About IPv4 to IPv6","items":[{"title":"IPv4-Mapped IPv6 Address","content":"This is a format to represent an IPv4 address as an IPv6 address. It allows IPv4-only nodes to be represented in an IPv6 address space."},{"title":"Format","content":"The format is ::ffff:x.x.x.x, where x.x.x.x is the IPv4 address. Internally, the first 80 bits are zeros, the next 16 bits are ones, and the last 32 bits are the IPv4 address."}],"featuresTitle":"Features","features":["Standard notation","Compressed notation","Explains the mapping"],"applicationsTitle":"Applications","applications":["IPv6 migration","Network configuration","Socket programming in dual-stack systems"]}},"iso8601Converter":{"title":"ISO 8601 Converter","description":"Convert dates and timestamps to and from ISO 8601 standard format.","converter":{"input":{"title":"Input Time","placeholder":"Enter ISO 8601 string, timestamp, or any date","currentTime":"Use Current Time"},"results":{"title":"ISO 8601 Formats","utc":"UTC (Z)","local":"Local Timezone","basic":"Basic Format","extended":"Extended Format","dateOnly":"Date Only","timeOnly":"Time Only","weekDate":"Week Date","ordinalDate":"Ordinal Date","timestamp":"Unix Timestamp","copy":"Copy"},"error":{"invalidDate":"Invalid date or timestamp","empty":"Please enter a value"}},"knowledge":{"title":"About ISO 8601","sections":[{"title":"What is ISO 8601?","content":"ISO 8601 is an international standard covering the worldwide exchange and communication of date and time-related data. It is maintained by the ISO."},{"title":"The 'T' and 'Z'","content":"The 'T' is just a literal to separate the date from the time. The 'Z' stands for 'Zero timezone' (UTC). Other timezones are indicated by an offset from UTC, like +08:00."},{"title":"Basic vs Extended Format","content":"Basic format minimizes the number of characters (e.g., 20240514T103000Z). Extended format incorporates separators to enhance human readability (e.g., 2024-05-14T10:30:00Z)."}]}},"iso8859Encoder":{"convert":{"title":"ISO-8859 Encoding Converter","input":"Input","output":"Output","isoToUtf8":"ISO-8859 → UTF-8","utf8ToIso":"UTF-8 → ISO-8859","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter ISO-8859 encoded hex data...","textInputPlaceholder":"Enter text to convert...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["Select ISO-8859 variant (Latin-1 to Latin-16)","ISO to UTF-8: Enter hex data","UTF-8 to ISO: Enter Unicode text"]},"knowledge":{"title":"ISO-8859 Knowledge","items":[{"title":"What is ISO-8859?","content":"ISO-8859 is a series of single-byte character encodings for European languages, with 15 parts (1-16, excluding 12)."},{"title":"Common Variants","content":"ISO-8859-1 (Latin-1) is most common for Western European; ISO-8859-5 for Cyrillic; ISO-8859-15 adds Euro symbol."}],"featuresTitle":"Key Features","features":["Single-byte encoding","Multi-language European support","ASCII compatible"],"applicationsTitle":"Common Applications","applications":["Legacy web pages","European documents","Legacy systems"]}},"jpgToPng":{"title":"JPG to PNG Converter","description":"Convert JPG/JPEG images to PNG format with transparency support","uploadTitle":"Upload JPG/JPEG Image","resultTitle":"Converted PNG Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop a JPG/JPEG image file","The image will be displayed as a preview after upload","Click the 'Convert' button to convert to PNG format","The converted PNG image will be shown with a preview","Click 'Download' to save the PNG file to your device","PNG format supports transparency, but JPG does not have transparency information","The conversion preserves the original image dimensions and quality"]},"knowledge":{"title":"About JPG to PNG Conversion","items":[{"title":"Why Convert JPG to PNG?","content":"PNG (Portable Network Graphics) supports lossless compression and transparency (alpha channel), making it ideal for graphics, logos, screenshots, and images that require crisp edges. Unlike JPG, PNG does not introduce compression artifacts, so converting from JPG to PNG is useful when you need to edit or layer images without further quality loss."},{"title":"JPG vs PNG Format Comparison","content":"JPG uses lossy compression optimized for photographs with smooth color gradients. PNG uses lossless compression suited for images with sharp edges, text, or transparency. JPG files are typically smaller than PNG for photos, but PNG maintains better quality for graphics and ensures no additional compression artifacts are introduced."},{"title":"When to Use PNG Format","content":"Use PNG when you need transparency support, such as logos and icons on web pages. PNG is also preferred for screenshots, diagrams, and illustrations where text clarity is important. Web designers often use PNG for UI elements that need to overlay different backgrounds."},{"title":"Browser-Based Conversion","content":"This tool processes images entirely in your browser using HTML5 Canvas API. No files are uploaded to any server, ensuring complete privacy and security. The conversion works offline once the page is loaded, making it fast and reliable for sensitive images."}],"featuresTitle":"Key Features","features":["Instant JPG to PNG conversion in your browser","No file upload — 100% client-side processing for privacy","Preserves original image dimensions and quality","Supports large image files up to 50MB"],"applicationsTitle":"Common Use Cases","applications":["Converting photos for web design requiring transparency","Preparing images for graphic design and editing software","Converting screenshots and diagrams for documentation","Creating high-quality images for presentations and reports"]}},"jsFormatter":{"title":"JavaScript Formatter & Minifier","description":"Format and beautify JavaScript code, or minify it for production.","format":"Format JS","minify":"Minify JS","clear":"Clear","history":"History","copy":"Copy","copied":"Copied!","darkTheme":"Dark Theme","formatSuccess":"Formatted successfully","formatError":"Formatting failed","minifySuccess":"Minified successfully","minifyError":"Minification failed","guide":{"title":"How to use","items":["Paste your JavaScript code into the editor.","Click 'Format JS' to beautify the code.","Click 'Minify JS' to compress and obfuscate.","Use the copy button to get the result.","Check History for previous versions."]},"knowledge":{"title":"About JavaScript Formatting","introduction":"JavaScript formatting improves code readability and adherence to style guides. Minification reduces file size by removing whitespace and renaming variables.","items":[{"title":"Why Format JavaScript?","content":"Consistent formatting makes code easier to understand and debug. It enforces standard coding styles (like indentation, semicolons) automatically."},{"title":"What does Minification do?","content":"Minification removes comments and whitespace, and shortens variable names (mangling), making the code much lighter for browsers to download and parse."}],"featuresTitle":"Key Features","features":["Prettier-based JS formatting","Terser-based minification","Supports ES6+ syntax","Syntax highlighting","Local history support"],"applicationsTitle":"Common Applications","applications":["Debugging obfuscated code (by formatting)","Preparing scripts for production","Standardizing code style","Learning JavaScript patterns"]}},"jsObfuscator":{"title":"JS Obfuscator","description":"Protect your JavaScript code by obfuscating variable names and logic.","input":"Input JavaScript","output":"Obfuscated Code","compact":"Compact Code","controlFlow":"Control Flow Flattening","obfuscate":"Obfuscate Code","copy":"Copy","copied":"Copied to clipboard","success":"Obfuscated successfully","error":"Error obfuscating code"},"jsonCsv":{"title":"JSON <-> CSV Converter","description":"Convert between JSON and CSV formats easily.","jsonLabel":"JSON","csvLabel":"CSV","toCsv":"To CSV","toJson":"To JSON","clear":"Clear","copy":"Copy","sample":"Sample","features":{"title":"Features","items":["Bidirectional conversion between JSON and CSV","Table view support","Download as file","Instant copy"]},"guide":{"title":"How to Use","items":["Paste your JSON array or CSV data.","Click convert to transform the data.","Result will be displayed in the adjacent editor."]},"knowledge":{"title":"About JSON and CSV","items":[{"title":"JSON","content":"JSON is a popular data format used for asynchronous browser/server communication."},{"title":"CSV","content":"Comma-Separated Values (CSV) is a simple file format used to store tabular data, such as a spreadsheet or database."}]}},"jsonDiff":{"title":"JSON Diff Tool","compare":"Compare","swap":"Swap","clear":"Clear","original":"Original JSON","modified":"Modified JSON","invalidJson":"Invalid JSON","diffCalculated":"Diff calculated successfully","guide":{"title":"Usage Guide","items":["Compare two JSON objects side-by-side","Visual highlighting of differences","Support for deep nested structures","Swap original and modified content","Syntax error detection"]},"knowledge":{"title":"JSON Diff Knowledge","introduction":"JSON Diff is a utility to compute and visualize differences between two JSON objects.","items":[{"title":"Comparison Types","content":"Structural Comparison: Checks if keys and depth match.\nValue Comparison: Checks if values for the same keys match."},{"title":"Diff Output","content":"Additions (Green), Deletions (Red), Modifications (Yellow/Mod)"}],"featuresTitle":"Key Features","features":["Visual difference indicators","Inline and Side-by-Side modes","Ignore whitespace options"],"applicationsTitle":"Applications","applications":["API response validation","Configuration file auditing","Data migration verification"]}},"jsonFormatter":{"title":"JSON Formatter","format":"Format","compress":"Compress","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","invalidJson":"Invalid JSON format","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format, compress and edit JSON data","Automatic syntax checking and error detection","Support code folding and expansion","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"JSON Knowledge","introduction":"JSON (JavaScript Object Notation) is a lightweight data interchange format. It is based on a subset of JavaScript but is language independent.","items":[{"title":"Basic Syntax","content":"JSON is built on two structures: collections of key-value pairs (objects) and ordered lists of values (arrays). It supports data types including strings, numbers, booleans, null, objects, and arrays."},{"title":"Data Types","content":"String: Enclosed in double quotes\nNumber: Integer or floating point\nBoolean: true or false\nNull: null\nObject: Key-value pairs enclosed in {}\nArray: Ordered list enclosed in []"},{"title":"Common Uses","content":"API data transfer, configuration files, data storage, frontend-backend communication, etc."}],"featuresTitle":"Key Features","features":["Simple syntax, easy to read and write","Supports nested structures for complex data","Language independent, widely supported","Lightweight with efficient transmission"],"applicationsTitle":"Applications","applications":["Web API response format","Application configuration files","Data storage and exchange","Cross-language data transfer","Frontend-backend interface communication"]},"expand":"Expand All","fold":"Fold All"},"jsonMinify":{"title":"JSON Minifier","description":"Compress JSON data by removing whitespace and comments.","input":"Input JSON","output":"Minified JSON","minify":"Minify JSON","copy":"Copy","copied":"Copied to clipboard","success":"JSON minified successfully","invalidJson":"Invalid JSON"},"jsonPath":{"title":"JSONPath Tester","evaluate":"Evaluate","copy":"Copy Result","clear":"Clear","input":"JSON Input","expression":"JSONPath Expression","result":"Evaluation Result","invalidJson":"Invalid JSON","invalidPath":"Invalid JSONPath expression","noMatch":"No match found","examples":"Examples","guide":{"title":"Usage Guide","items":["Enter JSON data and a JSONPath expression","Evaluate to see the query result","Use standard JSONPath syntax (e.g., $.store.book[*])","Click examples to load common patterns"]},"knowledge":{"title":"JSONPath Knowledge","introduction":"JSONPath is a query language for JSON, similar to XPath for XML.","items":[{"title":"Basic Syntax","content":"$$ : Root object\n@ : Current object\n. : Child operator\n[] : Subscript operator\n* : Wildcard"},{"title":"Filters","content":"[?()] : Filter expression. Example: [?(@.price < 10)]"}],"featuresTitle":"Key Features","features":["Extract data from complex JSON","Filter arrays based on conditions","Traverse nested structures"],"applicationsTitle":"Applications","applications":["Data extraction","API testing","Configuration validation"]}},"jsonXml":{"title":"JSON <-> XML Converter","description":"Convert between JSON and XML formats easily.","jsonLabel":"JSON","xmlLabel":"XML","toXml":"To XML","toJson":"To JSON","clear":"Clear","copy":"Copy","sample":"Sample","features":{"title":"Features","items":["Bidirectional conversion between JSON and XML","Attribute support","Syntax highlighting","Error validation"]},"guide":{"title":"How to Use","items":["Paste your JSON or XML code into the appropriate editor.","Click the conversion button.","Copy the result from the output editor."]},"knowledge":{"title":"About JSON and XML","items":[{"title":"JSON","content":"JSON (JavaScript Object Notation) is a lightweight format for storing and transporting data."},{"title":"XML","content":"XML (eXtensible Markup Language) is a markup language largely used for data representation and exchange."}]}},"jsonYaml":{"title":"JSON <-> YAML Converter","description":"Convert between JSON and YAML formats easily.","jsonLabel":"JSON","yamlLabel":"YAML","toYaml":"To YAML","toJson":"To JSON","clear":"Clear","copy":"Copy","sample":"Sample","features":{"title":"Features","items":["Bidirectional conversion between JSON and YAML","Syntax highlighting","Error validation","Instant copy to clipboard"]},"guide":{"title":"How to Use","items":["Paste your JSON or YAML code into the left editor.","Click the conversion button to translate to the other format.","The result will appear in the right editor.","Use the Copy button to copy the result to your clipboard."]},"knowledge":{"title":"About JSON and YAML","items":[{"title":"JSON","content":"JavaScript Object Notation (JSON) is a lightweight data-interchange format. It is easy for humans to read and write and easy for machines to parse and generate."},{"title":"YAML","content":"YAML Ain't Markup Language (YAML) is a human-friendly data serialization standard for all programming languages. It is often used for configuration files."}]}},"julianDate":{"title":"Julian Date Converter","description":"Convert between Julian Date (JD), Modified Julian Date (MJD), and standard date/time formats accurately.","inputJdLabel":"Julian Date (JD / MJD)","inputJdPlaceholder":"e.g., 2460200.5","inputDateLabel":"Local Date & Time","inputDatePlaceholder":"Select date and time","convertToDate":"Convert to Date","convertToJd":"Convert to Julian","resultTitle":"Conversion Result","resultJd":"Julian Date (JD)","resultMjd":"Modified Julian Date (MJD)","resultUtc":"UTC Time","resultLocal":"Local Time","copySuccess":"Copied successfully","clearForm":"Clear","now":"Current Time","aboutTitle":"About Julian Date","aboutContent":"The Julian Date (JD) is the continuous count of days since the beginning of the Julian Period (January 1, 4713 BC). It is widely used in astronomy and software to easily calculate the difference between two dates. The Modified Julian Date (MJD) was introduced to save space and reduce the number of digits; it is defined as JD - 2400000.5.","errorInvalidJd":"Please enter a valid Julian Date number","errorInvalidDate":"Please select a valid date and time","guide":{"title":"How to Use","items":["To convert a Julian Date to a calendar date, enter the JD value (e.g. 2460200.5) in the Julian Date field and click 'Convert to Date'.","To convert a calendar date to Julian Date, select the date and time using the date picker, then click 'Convert to Julian'.","Click 'Current Time' to instantly populate both fields with the current moment's Julian Date and calendar date.","All results include the Julian Date (JD), Modified Julian Date (MJD), UTC time, and your local time.","Use the copy buttons next to each result to copy the value to your clipboard."]},"knowledge":{"title":"About Julian Date","sections":[{"title":"What is a Julian Date?","content":"The Julian Date (JD) is a continuous count of days and fractions since noon on January 1, 4713 BC (Julian calendar). It is the standard time format used in astronomy, space science, and software to easily calculate the difference between two dates without calendar arithmetic."},{"title":"Modified Julian Date (MJD)","content":"The Modified Julian Date (MJD) is defined as JD − 2400000.5. It was introduced to reduce the number of digits in calculations and make timestamps fit in smaller data types. The MJD epoch begins at midnight on November 17, 1858."},{"title":"Common Applications","content":"Julian Dates are widely used in astronomy to record the timing of observations, in satellite operations, in timekeeping standards like GPS and NTP, and in programming to calculate date differences without dealing with months and leap years."}]}},"jwtDecoder":{"title":"JWT Decoder","description":"Decode JSON Web Tokens (JWT) to view their header, payload, and signature status.","jwtToken":"JWT Token","pasteTokenPlaceholder":"Paste your JWT here (e.g. eyJhbGciOi...)","invalidToken":"Invalid JWT format","header":"Header","payload":"Payload","active":"Active","expired":"Expired","claims":{"title":"Standard Claims"},"guide":{"title":"How to use","items":["Paste your JWT string into the input area.","The tool will automatically decode the Header and Payload.","View standard claims (exp, iat, sub, etc.) in the detailed view.","Check if the token is expired based on the 'exp' claim."]},"knowledge":{"title":"About JWT","introduction":"JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.","items":[{"title":"Structure","content":"A JWT consists of three parts separated by dots: Header, Payload, and Signature."},{"title":"Header","content":"typically consists of two parts: the type of the token, which is JWT, and the signing algorithm being used, such as HMAC SHA256 or RSA."},{"title":"Payload","content":"Contains the claims. Claims are statements about an entity (typically, the user) and additional data."},{"title":"Signature","content":"Used to verify the message wasn't changed along the way, and, in the case of tokens signed with a private key, it can also verify that the sender of the JWT is who it says it is."}]}},"jwtGenerator":{"title":"JWT Generator","description":"Generate signed JSON Web Tokens (JWT) with custom payloads and signing algorithms.","algorithm":"Algorithm","secret":"Secret Key","privateKey":"Private Key","secretPlaceholder":"Enter your secret key...","privateKeyPlaceholder":"Enter your private key (PEM/JWK)...","payload":"Payload (JSON)","generate":"Generate Token","generatedToken":"Generated Token","invalidPayloadJson":"Invalid Payload JSON","invalidPrivateKey":"Invalid Private Key","generationError":"Error generating token","guide":{"title":"How to use","items":["Select a signing algorithm (e.g., HS256, RS256).","Enter your Secret Key (for HS algorithms) or Private Key (for RS/ES algorithms).","Edit the Payload JSON to include your desired claims.","Click 'Generate Token' to create the signed JWT.","Copy the generated token for use in your application."]},"knowledge":{"title":"About JWT Generation","introduction":"Generating a JWT involves creating a JSON payload, specifying claims, and signing it with a secret or private key.","items":[{"title":"Algorithms","content":"HS256 (HMAC with SHA-256) uses a symmetric secret key. RS256 (RSA Signature with SHA-256) uses an asymmetric private key."},{"title":"Security","content":"Never share your secret key or private key. This tool runs entirely in your browser; keys are not sent to any server."},{"title":"Expiration","content":"It is best practice to include an expiration (exp) claim to limit the token's lifetime."}]}},"key-generator":{"title":"Secure Key & Password Generator","settings":{"title":"Generator Settings","type":"Generation Type","length":"Length","quantity":"Quantity","types":{"password":"Random Password","hex":"Hexadecimal (128/192/256-bit)","base64":"Base64 Config Key","wep_wpa":"WEP/WPA Key"},"options":{"uppercase":"Uppercase (A-Z)","lowercase":"Lowercase (a-z)","numbers":"Numbers (0-9)","symbols":"Symbols (!@#$)","excludeSimilar":"Exclude Similar (i, l, 1, L, o, 0, O)"},"generateBtn":"Generate Keys"},"results":{"title":"Generated Results","copyAll":"Copy All","clear":"Clear"}},"lcmCalculator":{"title":"LCM Calculator","description":"Calculate the Least Common Multiple (LCM) of numbers.","keywords":"lcm calculator, least common multiple, lowest common multiple","category":"Math","numbers":"Numbers","numbersPlaceholder":"Enter numbers separated by commas (e.g., 4, 6, 8)","calculate":"Calculate","result":"LCM","clear":"Clear","guide":{"title":"How to Use","items":["Enter two or more integers separated by commas.","Click 'Calculate'.","The Least Common Multiple will be displayed."]},"knowledge":{"title":"About LCM","introduction":"The least common multiple (LCM) of two integers is the smallest positive integer that is divisible by both integers.","items":[{"title":"Relationship with GCD","content":"LCM(a, b) = |a * b| / GCD(a, b)"}],"featuresTitle":"Features","features":["Calculate LCM of multiple numbers","Instant results"],"applicationsTitle":"Applications","applications":["Adding fractions with different denominators","Scheduling problems","Number theory"]}},"leapYearChecker":{"title":"Leap Year Checker","description":"Check whether a given year is a leap year according to the Gregorian calendar rules.","inputYearLabel":"Enter Year","inputYearPlaceholder":"e.g., 2024","checkBtn":"Check","resultTitle":"Result","isLeapYear":"is a leap year!","isNotLeapYear":"is NOT a leap year.","daysCountTitle":"Total Days in Year:","daysCountLeap":"366 days","daysCountNotLeap":"365 days","clearForm":"Clear","aboutTitle":"About Leap Years","aboutContent":"A leap year has 366 days instead of 365. The extra day, February 29th, is added to keep our calendar aligned with the Earth's revolutions around the Sun. To be a leap year, the year number must be divisible by four, except for end-of-century years, which must be divisible by 400. For example, the year 2000 was a leap year, but 1900 was not.","errorInvalidYear":"Please enter a valid numeric year (e.g., a number > 0)","guide":{"title":"How to Use","items":["Enter any year (e.g. 2024) in the year input field.","Click 'Check' to instantly see whether the year is a leap year or not.","The result shows a clear leap year / not a leap year indicator with the day count (366 or 365).","You can enter any year from 1 to 9999 to check the Gregorian calendar leap year status.","Click 'Clear' to reset the form and check another year."]},"knowledge":{"title":"About Leap Years","sections":[{"title":"Gregorian Leap Year Rules","content":"A year is a leap year in the Gregorian calendar if: (1) it is divisible by 4 AND (2) if divisible by 100, it must also be divisible by 400. So 2000 was a leap year, but 1900 was not. This adjustment keeps the calendar aligned with Earth's solar orbit of approximately 365.2425 days."},{"title":"Why Leap Years Exist","content":"Earth takes about 365.25 days to orbit the Sun. Without leap years, the calendar would drift by about 6 hours per year — after 100 years, seasons would be off by 25 days. Julius Caesar introduced the Julian calendar with a leap year every 4 years; Pope Gregory XIII refined it in 1582 with the century rules to further reduce the drift."},{"title":"Leap Year in Different Calendars","content":"The Julian calendar adds a leap year every 4 years without exception. The Hebrew calendar uses a 19-year cycle with 7 leap years (adding an extra month, not a day). The Islamic calendar is purely lunar and does not have leap years in the solar sense. The Chinese calendar is lunisolar with its own intercalation rules."}]}},"linkExtractor":{"title":"Link Extractor","description":"Extract all internal and external links from a webpage.","inputLabel":"URL","inputPlaceholder":"https://example.com","buttonLabel":"Extract Links","internalLinks":"Internal Links","externalLinks":"External Links","totalLinks":"Total Links","errorLabel":"Error","noLinks":"No links found.","copy":"Copy","copied":"Copied"},"logarithmCalculator":{"title":"Logarithm Calculator","description":"Calculate logarithms with any base, including natural logarithm (ln) and common logarithm (log10).","keywords":"logarithm calculator, log calculator, natural log, ln calculator","category":"Math","base":"Base","number":"Number","calculate":"Calculate","result":"Result","clear":"Clear","commonBase":"Common Bases","base2":"Binary (Base 2)","baseE":"Natural (Base e)","base10":"Common (Base 10)","guide":{"title":"How to use","items":["Enter the base and the number.","Or select a common base from the quick options.","The result will be calculated automatically."]},"knowledge":{"title":"About Logarithms","introduction":"The logarithm is the inverse function to exponentiation.","items":[{"title":"Definition","content":"If b^y = x, then log_b(x) = y"}],"featuresTitle":"Features","features":["Support for any positive base","Quick access to ln, log10, log2","High precision calculation"],"applicationsTitle":"Applications","applications":["Acoustics (decibels)","Chemistry (pH)","Information theory"]}},"lrc":{"title":"LRC Checksum Calculator","inputFormat":"Input Format","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate LRC..."},"results":{"hex":"LRC Result (Hex)","dec":"LRC Result (Dec)","oct":"LRC Result (Oct)","bin":"LRC Result (Bin)"},"knowledge":{"title":"LRC Knowledge","description":"LRC (Longitudinal Redundancy Check) is a data verification method that calculates the two's complement of the sum of all bytes.","features":{"title":"Features","items":["Simple calculation: Addition and two's complement","Better error detection than simple checksum","Commonly used in MODBUS ASCII protocol","Can detect odd number of bit errors"]},"applications":{"title":"Applications","items":["MODBUS ASCII communication","Industrial protocols","Serial data transmission","Message integrity verification","Terminal communication"]},"security":{"title":"Security Recommendations","items":["Not suitable for data security purposes","Consider using CRC for better error detection","Use with other verification methods for critical data","Be aware of its limitations in error detection"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"macFormatter":{"title":"MAC Address Formatter","description":"Convert MAC addresses between different formats (colon, dash, dot, no separator).","input":{"label":"Input MAC Address","placeholder":"e.g., 00:50:56:C0:00:08","format":"Detect Format"},"settings":{"title":"Format Settings","case":"Case","separator":"Separator"},"format":"Format MAC Address","error":"Invalid MAC address format. Please check your input.","cases":{"upper":"Uppercase","lower":"Lowercase"},"separators":{"colon":"Colon (MM:MM:MM:SS:SS:SS)","dash":"Dash (MM-MM-MM-SS-SS-SS)","dot":"Dot (MMMM.MMSS.SSSS)","none":"None (MMMMMMSSSSSS)"},"results":{"title":"Formatted MAC Address","copy":"Copy"},"guide":{"title":"How to use MAC Address Formatter","items":["Enter a MAC address in any common format (e.g., 00:50:56:C0:00:08, 00-50-56-C0-00-08, 0050.56c0.0008).","Select the desired output case (Uppercase or Lowercase).","Select the desired output separator style.","The formatted MAC address will appear instantly."]},"knowledge":{"title":"MAC Address Formats","items":[{"title":"EUI-48","content":"The standard format for MAC addresses is EUI-48, typically represented as six groups of two hexadecimal digits."},{"title":"Common Separators","content":"Colons (:) are common in Linux/macOS. Dashes (-) are often used in Windows. Cisco systems frequently use dots (.) grouping 4 digits."}],"featuresTitle":"Features","features":["Accepts multiple input formats","Instant conversion","Case conversion support"],"applicationsTitle":"Applications","applications":["Standardizing inventory data","Configuring network equipment","Cross-platform compatibility"]}},"macGenerator":{"title":"MAC Address Generator","description":"Generate random MAC addresses with custom prefixes and formats.","settings":{"title":"Generator Settings","quantity":"Quantity","prefix":"Prefix (Optional)","prefixPlaceholder":"e.g., 00:50:56","format":"Format","case":"Case","separator":"Separator"},"generate":"Generate MAC Addresses","formats":{"colon":"Colon (MM:MM:MM:SS:SS:SS)","dash":"Dash (MM-MM-MM-SS-SS-SS)","dot":"Dot (MMMM.MMSS.SSSS)","none":"None (MMMMMMSSSSSS)"},"cases":{"upper":"Uppercase","lower":"Lowercase"},"results":{"title":"Generated MAC Addresses"},"guide":{"title":"How to use MAC Address Generator","items":["Select the desired quantity of MAC addresses.","Optionally enter a specific OUI prefix (e.g., 00:50:56 for VMware).","Choose the output format (separator) and letter case.","Click 'Generate' to create the list of MAC addresses."]},"knowledge":{"title":"About MAC Addresses","items":[{"title":"Structure","content":"A MAC address is a 48-bit unique identifier. The first 24 bits (OUI) identify the manufacturer, and the last 24 bits are assigned by the manufacturer."},{"title":"Unicast vs Multicast","content":"The least significant bit of the first octet determines if the address is unicast (0) or multicast (1). Generated addresses are typically unicast."},{"title":"Local vs Universal","content":"The second least significant bit of the first octet determines if the address is universally administered (0) or locally administered (1)."}],"featuresTitle":"Features","features":["Custom OUI prefix support","Multiple output formats","Bulk generation"],"applicationsTitle":"Applications","applications":["Network testing","Software licensing testing","Virtual machine configuration"]}},"macLookup":{"title":"MAC Address Lookup","description":"Identify the manufacturer (OUI) of a device from its MAC address.","inputLabel":"MAC Address","inputPlaceholder":"00:1A:2B:3C:4D:5E","buttonLabel":"Lookup MAC","vendor":"Vendor","address":"Address","country":"Country","errorLabel":"Error","invalidMac":"Invalid MAC address format.","notFound":"Vendor not found."},"matrixCalculator":{"seoTitle":"Matrix Calculator | Add, Subtract, Multiply Matrices Online - TE Cyber","seoDescription":"Free online matrix calculator. Perform matrix addition, subtraction, and multiplication step-by-step. Handles matrices of various dimensions.","title":"Matrix Calculator","description":"Perform basic arithmetic operations on two matrices, including addition, subtraction, and multiplication.","matrixA":"Matrix A","matrixB":"Matrix B","operation":"Operation","add":"Addition (A + B)","subtract":"Subtraction (A - B)","multiply":"Multiplication (A × B)","calculate":"Calculate","clear":"Clear","result":"Result Matrix","invalidMatrix":"Please enter valid numeric matrices.","dimensionMismatchAddSub":"Matrices must have the same dimensions for addition or subtraction.","dimensionMismatchMul":"The number of columns in Matrix A must equal the number of rows in Matrix B for multiplication.","guide":{"title":"How to Use","items":["Enter the elements of Matrix A and Matrix B in the text areas.","Use spaces or commas to separate numbers in a row, and use new lines for each row.","Example: \n1 2\n3 4","Select the desired operation (Addition, Subtraction, or Multiplication).","Click 'Calculate' to view the resulting matrix."]},"knowledge":{"title":"About Matrix Arithmetic","introduction":"Matrix operations are fundamental in linear algebra, used to perform calculations on multidimensional grids of numbers.","items":[{"title":"Matrix Addition and Subtraction","content":"Addition and subtraction are performed element-wise. Therefore, both matrices must have exactly the same dimensions (number of rows and columns). If A and B are m×n matrices, their sum A+B (or difference A-B) is also an m×n matrix."},{"title":"Matrix Multiplication","content":"To multiply Matrix A by Matrix B, the number of columns in A must equal the number of rows in B. If A is an m×n matrix and B is an n×p matrix, their product AB is an m×p matrix. The element in the i-th row and j-th column of AB is computed by taking the dot product of the i-th row of A and the j-th column of B."}],"featuresTitle":"Key Properties","features":["Addition is commutative: A + B = B + A","Addition is associative: (A + B) + C = A + (B + C)","Multiplication is NOT generally commutative: AB ≠ BA","Multiplication is associative: (AB)C = A(BC)"],"applicationsTitle":"Applications","applications":["Computer Graphics: 2D and 3D transformations (rotation, scaling, translation).","Physics: Quantum mechanics and structural analysis.","Economics: Input-output models.","Machine Learning: Neural network weight transformations and optimization algorithms."]}},"matrixDeterminant":{"seoTitle":"Matrix Determinant Calculator | 2x2, 3x3, NxN - TE Cyber","seoDescription":"Free online matrix determinant calculator. Calculate the determinant of square matrices accurately and quickly.","title":"Matrix Determinant Calculator","description":"Calculate the determinant of a square matrix. The determinant is a scalar value that is a function of the entries of a square matrix.","matrix":"Input Square Matrix","calculate":"Calculate Determinant","clear":"Clear","result":"Determinant","invalidMatrix":"Please enter a valid numeric matrix.","notSquare":"Matrix must be a square (same number of rows and columns) to calculate the determinant.","guide":{"title":"How to Use","items":["Enter the elements of a square matrix in the text area.","Ensure the number of rows matches the number of columns (e.g., 2x2, 3x3, 4x4).","Use spaces or commas to separate numbers in a row, and use new lines for each row.","Click 'Calculate Determinant' to compute the value."]},"knowledge":{"title":"About Determinants","introduction":"The determinant is a special scalar value defined only for square matrices that contains significant information about the matrix and the linear transformation it represents.","items":[{"title":"Geometric Meaning","content":"In geometry, the absolute value of the determinant of real vectors is equal to the volume of the parallelepiped spanned by those vectors. If the determinant is zero, the volume is zero, indicating the vectors are linearly dependent."},{"title":"Invertibility","content":"A square matrix is invertible (non-singular) if and only if its determinant is non-zero. If the determinant is exactly zero, the matrix is singular and does not have an inverse."}],"featuresTitle":"Properties of Determinants","features":["The determinant of the identity matrix is 1: det(I) = 1.","The determinant of a transpose is the same: det(Aᵀ) = det(A).","Multiplicativity: det(AB) = det(A)det(B).","Swapping two rows (or columns) negates the determinant."],"applicationsTitle":"Applications","applications":["Solving systems of linear equations (Cramer's Rule).","Finding the inverse of a matrix.","Determining linear independence of a set of vectors.","Calculating volumes and areas in calculus (Jacobian determinant)."]}},"matrixInverse":{"seoTitle":"Matrix Inverse Calculator | Find Inverse Matrices Online - TE Cyber","seoDescription":"Free online inverse matrix calculator. Calculate the multiplicative inverse of square matrices step-by-step.","title":"Matrix Inverse Calculator","description":"Calculate the inverse of a square matrix. Multiplying a matrix by its inverse results in the identity matrix.","matrix":"Input Square Matrix","calculate":"Calculate Inverse","clear":"Clear","result":"Inverse Matrix","invalidMatrix":"Please enter a valid numeric matrix.","notSquare":"Matrix must be a square (same number of rows and columns) to calculate the inverse.","singularMatrix":"The matrix is singular (its determinant is zero) and therefore cannot be inverted.","guide":{"title":"How to Use","items":["Enter the elements of a square matrix in the text area.","Ensure the number of rows matches the number of columns.","Use spaces or commas to separate numbers in a row, and use new lines for each row.","Click 'Calculate Inverse' to view the inverse matrix."]},"knowledge":{"title":"About Inverse Matrices","introduction":"In linear algebra, an n-by-n square matrix A is called invertible (also nonsingular or nondegenerate), if there exists an n-by-n square matrix B such that AB = BA = I, where I is the n-by-n identity matrix.","items":[{"title":"Condition for Invertibility","content":"A square matrix is invertible if and only if its determinant is non-zero. If the determinant is zero, the matrix is called singular or degenerate, meaning it squishes space into a lower dimension, and this process cannot be reversed to uniquely retrieve the original space."},{"title":"The Identity Matrix","content":"The identity matrix, I, is a square matrix with 1s on the main diagonal and 0s elsewhere. It acts as the multiplicative identity in matrix algebra, analogous to the number 1 in regular multiplication."}],"featuresTitle":"Properties of Inverses","features":["If A is invertible, its inverse is unique.","(A⁻¹)⁻¹ = A","(AB)⁻¹ = B⁻¹A⁻¹ (Notice the reversed order)","(Aᵀ)⁻¹ = (A⁻¹)ᵀ"],"applicationsTitle":"Applications","applications":["Cryptography: Encrypting and decrypting messages (e.g., Hill cipher).","Computer Graphics: Reversing transformations like scaling, rotation, and translation.","Solving linear systems equations of the form Ax = b (x = A⁻¹b).","Control theory and signal processing."]}},"matrixTranspose":{"seoTitle":"Matrix Transpose Calculator | Transpose Matrices Online - TE Cyber","seoDescription":"Free online matrix transpose calculator. Easily find the transpose of any matrix by swapping its rows and columns.","title":"Matrix Transpose Calculator","description":"Calculate the transpose of a matrix by reflecting its elements along its main diagonal.","matrix":"Input Matrix","calculate":"Calculate Transpose","clear":"Clear","result":"Transposed Matrix","invalidMatrix":"Please enter a valid numeric matrix.","guide":{"title":"How to Use","items":["Enter the elements of the matrix in the text area.","Use spaces or commas to separate numbers in a row, and use new lines for each row.","Example: \n1 2 3\n4 5 6","Click 'Calculate Transpose' to view the swapped rows and columns."]},"knowledge":{"title":"About Matrix Transposition","introduction":"The transpose of a matrix is an operator which flips a matrix over its diagonal, switching the row and column indices of the matrix.","items":[{"title":"Definition","content":"The transpose of an m×n matrix A, denoted as Aᵀ, is an n×m matrix. The element at the i-th row and j-th column of Aᵀ is equal to the element at the j-th row and i-th column of A."},{"title":"Symmetric Matrices","content":"A square matrix that is equal to its transpose (A = Aᵀ) is called a symmetric matrix. For symmetric matrices, the elements are totally symmetric across the main diagonal."}],"featuresTitle":"Properties of Transpose","features":["(Aᵀ)ᵀ = A","(A + B)ᵀ = Aᵀ + Bᵀ","(cA)ᵀ = cAᵀ, where c is a scalar","(AB)ᵀ = BᵀAᵀ (Notice the reversed order of multiplication)"],"applicationsTitle":"Applications","applications":["Solving systems of linear equations.","Data analysis techniques like Principal Component Analysis (PCA).","Representing graphs and networks in computer science as adjacency matrices."]}},"memeGenerator":{"title":"Meme Generator","description":"Meme Generator is used to process images.","uploadTitle":"Upload Image to Make Meme","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Meme Generator","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"topText":"Top Text","bottomText":"Bottom Text","generate":"Generate Meme","settings":"Meme Settings","fontSize":"Font Size","textColor":"Text Color","outlineColor":"Outline Color","apply":"Download Meme","enterTop":"Enter top text...","enterBottom":"Enter bottom text..."},"metaTagGenerator":{"title":"Meta Tag Generator","description":"Generate SEO and social media meta tags for your website.","configuration":"Configuration","basic":"Basic Info","settings":"Settings","openGraph":"Open Graph (Social)","siteTitle":"Site Title","siteDescription":"Description","siteKeywords":"Keywords","siteAuthor":"Author","charset":"Charset","viewport":"Viewport","robots":"Robots","result":"Result","copy":"Copy","copied":"Copied to clipboard"},"metadata":{"title":"Online Calculator Toolbox | Free Online Tools Collection","template":"%s | Online Calculator Toolbox","description":"Professional online calculation tools collection: Time & Date Converters (Timestamp, Unix, GPS/BeiDou), Date Calculator, Batch Time Converter, Online Encryption/Decryption Tools (RSA, AES with ECB/CBC/CFB/OFB/CTR/GCM modes, SM2/SM4), Base64 Encoder/Decoder, Hash Calculators (MD5, SHA, SM3), Checksum Tools (CRC8/16/32, BCC/LRC, Fletcher/Adler32), JSON Formatter, and Modbus Tools. Free to use, no download needed.","keywords":["timestamp to date converter,unix time converter,gps time conversion,beidou time converter,date difference calculator","time format converter,bulk time conversion,timezone converter,time calculator,date range calculator","satellite time converter,gps week calculator,beidou time tools,utc converter,leap second calculator","online tools,calculator tools,free tools online,file converter","rsa encryption tool,rsa decryption tool,aes encryption online,aes decryption online,sm2 encryption tool,sm2 decryption tool,sm4 encryption,sm4 decryption","aes ecb encryption,aes cbc encryption,aes cfb encryption,aes ofb encryption,aes ctr encryption,aes gcm encryption","base64 encoder,base64 decoder,utf8 converter,hex converter online","md5 hash generator,sha1 generator,sha256 calculator,sha512 generator,sha3 hash,sm3 hash calculator,ripemd160 hash","hmac calculator,hmac md5 generator,hmac sha1 generator,hmac sha256 generator","crc calculator,crc8 checksum,crc16 calculator,crc32 generator,xor calculator,bcc checksum,lrc calculator","fletcher checksum,adler32 calculator,parity bit calculator","chinese cryptography,sm2 cryptography,sm3 hash tool,sm4 cipher,commercial encryption","morse code translator,morse code generator,password converter","developer tools online,programming utilities,cryptography tools","json formatter online,json beautifier,json minifier,json editor tool","modbus tool,modbus rtu calculator,modbus command tool,modbus parser","online toolset,free web tools,developer utilities,coding tools","encryption utilities,decryption tools,encoding tools,decoding utilities,checksum calculators"],"openGraph":{"title":"Online Calculator Toolbox - Free Online Tools Collection","description":"Professional online tools featuring Time & Date Converters (Timestamp, GPS/BeiDou), Date Calculator, Batch Time Converter, plus Encryption/Decryption Tools (RSA/AES/SM2/SM4), supporting various encryption modes, Base64 Encoding/Decoding, Hash Generation (MD5/SHA/SM3), Checksum Calculation (CRC/BCC/LRC), JSON Formatter, and Modbus Tools. All tools are free to use, no download required, works on both mobile and desktop.","locale":"en_US"},"category":"Online Tools","applicationName":"Online Calculator Toolbox"},"moduloCalculator":{"title":"Modulo Calculator","description":"Calculate the remainder of a division operation.","keywords":"modulo calculator, remainder calculator, mod calculator","category":"Math","dividend":"Dividend","divisor":"Divisor","calculate":"Calculate","result":"Result","clear":"Clear","guide":{"title":"How to use","items":["Enter the dividend (number to be divided).","Enter the divisor.","The tool will show the remainder (modulo)."]},"knowledge":{"title":"About Modulo","introduction":"The modulo operation returns the remainder or signed remainder of a division, after one number is divided by another.","items":[{"title":"Operator","content":"Often denoted by % (e.g., 5 % 2 = 1)"}],"featuresTitle":"Features","features":["Calculate remainder","Handle negative numbers"],"applicationsTitle":"Applications","applications":["Computer science (hash functions)","Cryptography","Clock arithmetic"]}},"morse":{"title":"Morse Code Converter","convert":{"title":"Morse Code Conversion","input":"Input","output":"Output","inputPlaceholder":"Enter text to convert...","outputPlaceholder":"Conversion result will appear here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap"},"knowledge":{"title":"Morse Code Knowledge","introduction":"Morse code is a method of encoding text characters using standardized sequences of dots (.) and dashes (-) . It was invented by Alfred Vail in 1837.","alphabetTitle":"Alphabet Reference","numbersTitle":"Numbers Reference","punctuationTitle":"Punctuation Reference","rulesTitle":"Usage Rules","rules":["Dot (.) represents short signal, dash (-) represents long signal","No space between dots and dashes within the same character","One space between characters","Two spaces between words","A dash should be three times the length of a dot"],"tableHeaders":{"letter":"Letter","number":"Number","symbol":"Symbol","morse":"Morse Code"}}},"mxLookup":{"title":"MX Record Lookup","description":"Find the Mail Exchange (MX) records for a domain to see which mail servers handle its email.","input":{"label":"Domain Name","placeholder":"e.g., gmail.com","button":"Lookup MX Records"},"result":{"priority":"Priority","exchange":"Mail Server (Exchange)","noRecords":"No MX records found.","error":"Error"},"guide":{"title":"How to use MX Record Lookup","items":["Enter the domain name you want to check (e.g., outlook.com).","Click 'Lookup MX Records'.","The tool will list the mail servers responsible for accepting email for that domain, ordered by priority."]},"knowledge":{"title":"About MX Records","items":[{"title":"What is an MX Record?","content":"A Mail Exchange (MX) record specifies the mail server responsible for accepting email messages on behalf of a domain."},{"title":"Priority","content":"Lower priority values indicate higher preference. Mail is delivered to the server with the lowest priority number first."},{"title":"Redundancy","content":"Multiple MX records are used to provide redundancy and load balancing for email delivery."}]}},"myIp":{"title":"My IP Address","description":"Check your public IP address, location, and ISP information instantly.","ipAddress":"Your IP Address","location":"Location","isp":"ISP","copy":"Copy","copied":"Copied","ipv4":"IPv4","ipv6":"IPv6","userAgent":"User Agent","guide":{"title":"About IP Addresses","items":["An IP (Internet Protocol) address is a unique numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.","IPv4 addresses are 32-bit numbers, typically displayed as four decimal numbers separated by dots (e.g., 192.168.1.1).","IPv6 addresses are 128-bit numbers, represented as eight groups of four hexadecimal digits (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334).","This tool shows your public IP address as seen by web servers."]},"knowledge":{"title":"IP Address Knowledge","items":[{"title":"Public vs Private IP","content":"Public IP addresses are used on the internet, while private IP addresses are used within local networks (LANs)."},{"title":"Static vs Dynamic IP","content":"Static IP addresses never change, while dynamic IP addresses can change each time you connect to the internet."}],"featuresTitle":"Features","features":["Instant IP detection","IPv4 and IPv6 support","User Agent display","One-click copy"],"applicationsTitle":"Applications","applications":["Troubleshooting network connectivity","Configuring firewalls and access controls","Verifying VPN or proxy connections","Geolocation services"]}},"nanoidGenerator":{"title":"NanoID Generator","description":"Generate tiny, secure, URL-friendly unique string IDs.","configuration":"Configuration","length":"Length","count":"Count","alphabet":"Alphabet (Optional)","customAlphabetPlaceholder":"Custom alphabet characters...","uppercase":"Uppercase Output","generate":"Generate NanoIDs","generatedIds":"Generated IDs","copy":"Copy","copied":"Copied!","guide":{"title":"How to use","items":["Set the desired length for your IDs (default 21).","Adjust the count of IDs to generate.","Optionally, customize the alphabet or toggle Uppercase Output.","Click 'Generate NanoIDs' to create them.","Copy the result to clipboard."]},"knowledge":{"title":"About NanoID","introduction":"NanoID is a tiny, secure, URL-friendly, unique string ID generator.","items":[{"title":"Small and Fast","content":"NanoID is lightweight and faster than UUID. It uses a larger alphabet so shorter IDs can have the same collision resistance."},{"title":"Secure","content":"It uses hardware random generator. Can be used in clusters."},{"title":"Customizable","content":"You can change the alphabet and length to suit your needs, making it very flexible."}]}},"ntpTimestamp":{"title":"NTP Timestamp Converter","description":"Convert Network Time Protocol (NTP) timestamps to standard date/time formats and vice versa.","inputTypeSelection":"Conversion Direction","typeNtpToDate":"NTP to Date","typeDateToNtp":"Date to NTP","inputNtpLabel":"NTP Timestamp (Seconds since Jan 1, 1900)","inputNtpPlaceholder":"e.g., 3886561140","inputNtpFractionLabel":"Fractional Precision (Optional)","inputNtpFractionPlaceholder":"e.g., 2147483648 (1/2 second)","inputDateLabel":"Local Date & Time","inputDatePlaceholder":"Select date and time","convertBtn":"Convert","resultTitle":"Conversion Result","resultNtp":"NTP Timestamp","resultNtpHex":"NTP Hex Format","resultUtc":"UTC Time","resultLocal":"Local Time","copySuccess":"Copied successfully","clearForm":"Clear","now":"Current Time","aboutTitle":"About NTP Timestamp","aboutContent":"The Network Time Protocol (NTP) uses a 64-bit timestamp consisting of a 32-bit part for seconds and a 32-bit part for fractional seconds. The NTP epoch began on January 1, 1900 (00:00:00 UTC). Because the 32-bit seconds field will overflow in 2036 (known as the Year 2036 problem), NTPv4 introduced mechanisms to handle different 'Eras', but standard timestamp values count seconds from exactly 1900-01-01T00:00:00Z. For instance, UNIX epoch starts 70 years after NTP epoch.","errorInvalidNtp":"Please enter a valid NTP timestamp","errorInvalidDate":"Please select a valid date and time","guide":{"title":"How to Use","items":["Select the conversion direction: 'NTP → Date' to convert an NTP timestamp to a human-readable date, or 'Date → NTP' to get the NTP value for a date.","For NTP → Date: enter the NTP seconds value and optionally the NTP fraction field, then click Convert.","For Date → NTP: use the date/time picker to select a moment and click Convert.","Click 'Current Time' to fill in the current NTP timestamp and date automatically.","The result shows the NTP value in both decimal and hex, along with UTC and local time."]},"knowledge":{"title":"About NTP Timestamps","sections":[{"title":"What is an NTP Timestamp?","content":"Network Time Protocol (NTP) timestamps are 64-bit fixed-point numbers representing time as seconds since January 1, 1900 00:00:00 UTC. The upper 32 bits are the integer seconds count, and the lower 32 bits represent fractions of a second, giving a resolution of about 232 picoseconds."},{"title":"NTP Era and Rollover","content":"The 32-bit seconds field wraps around every 2^32 seconds (approximately 136 years). The first NTP era (Era 0) ends around February 7, 2036. NTP version 4 handles this with 128-bit timestamps, but most implementations manage era rollover through context. The NTP epoch differs from Unix epoch by 70 years (2,208,988,800 seconds)."},{"title":"NTP vs Other Timestamps","content":"Unlike Unix timestamps (seconds from 1970) or Windows FILETIME (100ns from 1601), NTP uses 1900 as its epoch. To convert NTP to Unix time, subtract 2,208,988,800 from the NTP seconds. NTP is primarily used for network time synchronization in servers, routers, and all internet-connected devices."}]}},"numberBaseConverter":{"title":"Base Converter","description":"Powerful number base conversion tool supporting conversion between any bases from 2 to 36","inputLabel":"Input Number","inputPlaceholder":"Enter the number to convert","sourceBase":"Source Base","targetBase":"Target Base","result":"Conversion Result","convertButton":"Convert","copyResult":"Copy Result","clearInput":"Clear Input","invalidInput":"Input number does not match the specified base format","commonResults":"Common Base Conversion Results","customConversion":"Custom Base Conversion","quickExamples":"Quick Examples","validChars":"Valid Characters","conversionError":"Conversion Failed","resultPlaceholder":"Conversion result will be displayed here","decimalValue":"Decimal Value","commonBases":"Common Bases","noInput":"Please enter a number","guide":{"title":"Usage Guide","items":["Select source base and enter the number to convert","In the common base results section, check the base types you want to view","Common bases will automatically display conversion results with one-click copy","In the custom conversion section, select any base from 2-36 for conversion","Click quick examples to quickly input common test values","Supported characters: 0-9 digits, A-Z letters (case insensitive)"]},"knowledge":{"title":"Number Base Knowledge","items":[{"title":"What is a Number Base?","content":"A number base (also called radix) is a counting system that determines how many different symbols can be used in each position of a number representation. The base number equals the count of available symbols. For example, decimal has 10 symbols (0-9), binary has 2 symbols (0-1), and hexadecimal has 16 symbols (0-9, A-F). Positional notation is the foundation of modern number systems, where each position's value equals the base raised to a power."},{"title":"Binary System","content":"Binary is the fundamental language of computers, using only two digits: 0 and 1. This corresponds to circuit states: 0 represents off, 1 represents on. Binary invention can be traced back to 17th-century Leibniz, but it wasn't widely used in computer science until the 20th century. Each binary digit (bit) can represent 2 states, and n binary digits can represent 2^n different values."},{"title":"Octal System","content":"Octal uses 8 digits (0-7) and was widely used in early computing because 3 binary bits correspond exactly to 1 octal digit (2³=8). In Unix and Unix-like systems, octal is commonly used for file permissions, such as 755 meaning the owner has read-write-execute permissions, while group and other users have read-execute permissions. Although less used now, it can still be found in some embedded systems and legacy code."},{"title":"Decimal System","content":"Decimal is the most commonly used counting system by humans, using 10 digits (0-9). This likely originates from humans having 10 fingers. The positional notation of decimal first appeared in ancient India, then spread to the Arab world, and later to Europe. In decimal, each position's weight is a power of 10, such as 2023 = 2×10³ + 0×10² + 2×10¹ + 3×10⁰."},{"title":"Hexadecimal System","content":"Hexadecimal uses 16 symbols (0-9 and A-F) and is extremely important in computer science. Each hexadecimal digit corresponds to 4 binary digits (2⁴=16), making conversion between binary and hexadecimal very intuitive. Hexadecimal is widely used for memory addresses, color codes (like #FF0000 for red), machine code, Unicode character encoding, etc. Programmers often use hexadecimal to simplify long strings of binary data."},{"title":"Base Conversion Principles","content":"Base conversion is based on the mathematical principle of positional notation. Any number can be represented as: N = aₙ×Bⁿ + aₙ₋₁×Bⁿ⁻¹ + ... + a₁×B¹ + a₀×B⁰, where B is the base and aᵢ are the digits in each position. Conversion methods include: 1) Any base to decimal: weighted sum expansion; 2) Decimal to any base: successive division with remainder; 3) Binary to octal/hexadecimal conversion: using the relationships 2³=8 and 2⁴=16 for grouping conversion."},{"title":"Higher Base Systems","content":"Systems beyond base 16 typically use 0-9 and A-Z to represent larger values. The highest commonly seen is base 36, using the complete alphabet. These higher base systems are useful in certain special applications, such as generating short unique identifiers or compressed data representation. For example, YouTube's video IDs use a similar high-base encoding method to generate short identifiers."},{"title":"Historical Development","content":"Different civilizations developed different base systems: Babylonians used base 60 (still used in time and angle measurements today), Mayans used base 20, and ancient China sometimes used base 16. The development of modern computer science made bases 2, 8, and 16 particularly important. In the 1940s, computer pioneers like John von Neumann established binary as the standard for internal computer representation."},{"title":"Practical Applications","content":"Base conversion is ubiquitous in modern technology: IP address conversion in network programming, hash value representation in cryptography, pixel values in image processing, primary key generation in databases, register operations in embedded systems, color values in web development, bitwise operation optimization in game development, etc. Mastering base conversion is important for understanding computer underlying principles and optimizing program performance."}]},"bases":{"binary":"Binary","octal":"Octal","decimal":"Decimal","hexadecimal":"Hexadecimal","baseUnit":"-base"}},"numberToWords":{"seoTitle":"Number to Words Converter | Spell Out Numbers - TE Cyber","seoDescription":"Free online converter to spell out numbers into words. Supports English numbers for check writing, amounts, and spelling checks.","title":"Number to Words Converter","description":"Convert numerical digits into their exact English word representations instantly.","numberInput":"Number Input","convert":"Convert to Words","clear":"Clear","result":"Words Result","invalidInput":"Please enter a valid number.","guide":{"title":"How to Use","items":["Enter a number into the text field (e.g., 1234.56).","Click the 'Convert to Words' button.","The spelled-out text will appear in the result box, ready to copy."]},"knowledge":{"title":"About Number Spelling","introduction":"Converting numbers to words is often required in legal and financial documents to prevent ambiguity or tampering.","items":[{"title":"Check Writing","content":"When writing checks, standard practice requires writing the numerical amount both in digits and spelled out in words to ensure the correct intended value is cleared."},{"title":"Decimal Fractions","content":"When decimals are included, they are traditionally spelled out individually or expressed as a fraction over 100 for currencies."}],"featuresTitle":"Linguistic Quirks","features":["The hyphen is usually placed between tens and units from 21-99 (e.g., 'twenty-one').","American English typically omits the word 'and' after hundred (e.g., 'one hundred ten'), while British English includes it ('one hundred and ten')."],"applicationsTitle":"Applications","applications":["Writing checks or bank drafts.","Drafting legal contracts and formal agreements.","Assisting individuals learning English numbers."]}},"octalEncoder":{"convert":{"title":"Octal Encode/Decode","input":"Input","output":"Output","clear":"Clear","inputPlaceholder":"Enter text or Octal values...","outputPlaceholder":"Result will be displayed here...","encodeButton":"To Octal","decodeButton":"To Text","swapButton":"Swap"},"guide":{"title":"Instructions","items":["To Octal: Convert each character to its corresponding octal numeric representation","To Text: Convert octal number sequences back to readable text characters","Supports space, comma, and other delimiters between octal values","Octal values use only digits 0-7","Each octal digit represents exactly 3 binary bits","Commonly used for Unix file permissions and programming escape sequences"]},"knowledge":{"title":"Octal Knowledge","items":[{"title":"What is Octal?","content":"Octal is a base-8 numeral system using digits 0 through 7. Each octal digit represents exactly 3 binary bits (2³=8), making it an efficient shorthand for binary data. In early computing history, octal was widely adopted due to its natural alignment with hardware architectures."},{"title":"Historical Background","content":"Octal was widely used in computer systems from the 1950s through 1970s, particularly in machines with 6-bit, 12-bit, 24-bit, or 36-bit word lengths, such as UNIVAC, PDP-8, and IBM mainframes. These machines' word lengths were multiples of 3, making octal the natural display and input format."},{"title":"Octal and Binary","content":"Conversion between octal and binary is straightforward: each group of 3 binary digits corresponds to 1 octal digit. For example, binary 111 = octal 7, binary 001000 = octal 10. This simple mapping makes octal a convenient way to read and input binary data."},{"title":"Unix File Permissions","content":"The most famous modern use of octal is Unix/Linux file permissions. The chmod command uses three octal digits to represent permissions: 7=rwx (read/write/execute), 6=rw- (read/write), 5=r-x (read/execute), 4=r-- (read only). For example, chmod 755 means owner can read/write/execute, others can read/execute."}],"featuresTitle":"Key Features","features":["Base-8 system using digits 0-7","Natural fit with binary (each digit = 3 binary bits)","Better than decimal for representing bit patterns","Standard representation for Unix/Linux file permissions","Supported as literal format in many programming languages (0o or 0 prefix)"],"applicationsTitle":"Common Applications","applications":["Unix/Linux file permission settings (chmod 755, etc.)","C language octal escape characters (\\012 for newline)","Data representation in legacy computing systems","Digital electronics and embedded systems debugging","Network protocols and hardware register configuration"]}},"palette-generator":{"title":"Color Palette Generator","description":"Generate harmonious and professional color schemes with one click based on color theory.","baseColor":"Base Color","schemes":{"title":"Color Models","monochromatic":"Monochromatic","analogous":"Analogous","complementary":"Complementary","splitComplementary":"Split Complementary","triadic":"Triadic","tetradic":"Tetradic"},"generate":"Regenerate","setAsBase":"Set as Base","guide":{"title":"Usage Guide","items":["Click on 'Base Color' to select a starting color.","The page will automatically display various color schemes based on classic color theory.","Click on any color in the scheme to set it as the new base color or copy the code directly.","Use these schemes to quickly build visual systems for websites or designs."]},"knowledge":{"title":"Intro to Color Theory","items":[{"title":"Complementary Colors","content":"Two colors opposite each other on the color wheel. Using complementary colors can create a strong visual contrast."},{"title":"Analogous Colors","content":"Colors adjacent to each other on the color wheel, usually appearing very harmonious and suitable for creating a comfortable visual atmosphere."}]}},"pantone-converter":{"title":"Pantone Color Converter","description":"Convert regular color codes to the closest Pantone standard color matching.","input":"Base Color","closest":"Closest Pantone Color","match":"Match Accuracy","guide":{"title":"Usage Guide","items":["Enter a HEX or RGB color.","The system compares the color with the Pantone library using the Delta E algorithm.","Returns the visually closest Pantone matching and its RGB values."]}},"parity":{"title":"Parity Check Calculator","inputFormat":"Input Format","parityType":"Parity Type","clear":"Clear","even":"even","odd":"odd","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate parity..."},"results":{"parity":"Parity Result"},"knowledge":{"title":"Parity Check Knowledge","description":"Parity check is a simple error detection method that counts the number of 1s in the data to determine if an error has occurred.","features":{"title":"Features","items":["Simple calculation: Only counts the number of 1s","Two types: Odd parity and even parity","Low resource usage: Suitable for simple systems","Cannot detect even number of bit errors"]},"applications":{"title":"Applications","items":["Serial communication","Data transmission verification","Simple error detection","Embedded systems"]},"security":{"title":"Security Recommendations","items":["Not suitable for data security purposes","Cannot detect even number of bit errors","Consider using more robust error detection methods","Combine with other methods for critical data"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"password-generator":{"title":"Password Generator","settings":{"title":"Generator Settings","length":"Password Length","quantity":"Quantity","options":{"uppercase":"Uppercase (A-Z)","lowercase":"Lowercase (a-z)","numbers":"Numbers (0-9)","symbols":"Symbols (!@#$)","excludeSimilar":"Exclude Similar Characters (i, l, 1, L, o, 0, O)"},"generateBtn":"Generate Passwords"},"results":{"title":"Generated Passwords","copyAll":"Copy All","clear":"Clear"}},"password-strength":{"title":"Password Strength Checker","input":{"title":"Test Your Password","placeholder":"Type a password to test...","show":"Show","hide":"Hide"},"results":{"score":"Overall Score","scores":["Too Guessable","Very Weak","Weak","Safely Acceptable","Strong"],"crackTime":"Estimated Crack Time","onlineC":"Online Attack (Throttled)","onlineP":"Online Attack (Unthrottled)","offlineFast":"Offline Attack (Fast Hash)","offlineSlow":"Offline Attack (Slow Hash)","feedback":"Feedback & Suggestions","warnings":"Warnings:","suggestions":"Suggestions:"}},"pdfCompress":{"title":"Compress PDF","description":"Reduce PDF file size without significant quality loss by optimizing document structure and images. All processing is done in your browser.","uploadTitle":"Upload PDF File","compressLevel":"Compression Level","low":"Less Compression (Highest Quality)","medium":"Balanced (Recommended)","high":"Maximum (Smallest Size)","compress":"Compress PDF","compressing":"Optimizing structure...","compressSuccess":"PDF compressed! Size reduced by {percent}%.","compressError":"Compression failed.","originalSize":"Original Size","newSize":"Compressed Size","processing":"Optimizing structure...","download":"Download Compressed PDF","guide":{"title":"How to Use","items":["Upload the PDF file you want to shrink.","Choose a compression level. 'Balanced' is usually the best choice.","Click 'Compress PDF' and wait for the optimization to finish.","Compare the sizes and download your optimized document."]}},"pdfExtractImages":{"title":"Extract Images from PDF","description":"Automatically find and extract embedded original image resources from PDF documents. No quality loss. All processing happens in your browser.","uploadTitle":"Upload PDF File","extract":"Extract Images Now","extracting":"Scanning resources...","extractSuccess":"Successfully found and extracted {count} images!","extractError":"An error occurred, or no embedded images were found.","noImages":"No embedded image objects found in this PDF.","resultTitle":"Extracted Image Resources","downloadAll":"Download All (ZIP)","downloadAs":"Download as {format}","preview":"Preview","scanLocal":"Scanning browser local resources","foundImages":"Successfully extracted {count} images","guide":{"title":"How to Use","items":["Upload a PDF file containing images (e.g., illustrated reports, ebooks).","Click 'Extract Images Now' to scan the internal object stream.","Preview or download all extracted original images in a ZIP package.","Note: This extracts raw image data from the PDF file, distinct from 'PDF to Image' conversion."]}},"pdfExtractText":{"title":"Extract Text from PDF","description":"Extract text content from PDF documents. Copy the extracted text to clipboard or download as a text file. All processing is done in your browser.","uploadTitle":"Upload PDF File","extract":"Extract Text","extracting":"Extracting...","extractSuccess":"Text extracted successfully!","extractError":"Failed to extract text. The PDF may contain images only.","resultTitle":"Extracted Text","copyAll":"Copy All","downloadTxt":"Download as TXT","noText":"No text content found in this PDF.","limitation":"Note: This tool extracts text from standard PDF files. Scanned documents (image-only PDFs) may not yield results. For scanned PDFs, please use OCR tools.","pageLabel":"Page","totalChars":"Total Characters","detectScan":"No machine-readable text found on some pages. They might be scanned images.","tryOcr":"Try OCR (Image Recognition)","ocrProgress":"Recognizing text via OCR: Page {current} of {total}...","ocrLanguage":"OCR Language","ocrSuccess":"OCR recognition complete!","ocrError":"OCR recognition failed. Please ensure the document is clear.","guide":{"title":"How to Use","items":["Upload a PDF file by clicking the upload area or dragging and dropping.","Click 'Extract Text' to begin the extraction process.","The extracted text will be displayed organized by page.","Use 'Copy All' to copy all extracted text to your clipboard.","Click 'Download as TXT' to save the text as a plain text file.","Note: Scanned PDFs (image-based) may not contain extractable text."]},"knowledge":{"title":"About PDF Text Extraction","items":[{"title":"How Text Extraction Works","content":"PDF text extraction reads the text streams embedded in PDF pages. PDFs store text as a series of text operators that position and render characters. The extraction process parses these operators to reconstruct readable text. This works well for digitally created PDFs but may have limitations with complex layouts or fonts."},{"title":"Digital vs. Scanned PDFs","content":"Digital PDFs (created from word processors, design tools, or web pages) contain machine-readable text that can be directly extracted. Scanned PDFs contain only images of text and require Optical Character Recognition (OCR) to convert the images into text. This tool works best with digital PDFs."},{"title":"Text Encoding and Fonts","content":"PDFs can use various text encoding methods and embedded fonts. Some PDFs use standard encoding (like UTF-8 or WinAnsi), while others use custom font encodings that map character codes to glyphs differently. Complex encodings may affect extraction accuracy, particularly with non-Latin scripts or special symbols."},{"title":"Privacy and Security","content":"All text extraction is performed entirely in your browser. Your PDF files are never uploaded to any server, ensuring complete privacy and security of your documents. The pdf-lib library processes the files locally, making this tool safe for handling confidential or sensitive documents."}],"featuresTitle":"Key Features","features":["Extract text from any standard PDF file","Page-by-page text organization","Copy extracted text to clipboard","Download text as a .txt file","100% client-side processing","Character count display"],"applicationsTitle":"Common Use Cases","applications":["Extracting content from PDF reports for analysis","Copying text from PDF documents for editing","Converting PDF content to plain text format","Extracting data from PDF forms and tables","Creating searchable text versions of PDF documents"]}},"pdfFromImage":{"title":"Image to PDF","description":"Combine multiple images (JPG/PNG) into a single PDF document. Adjust layout, margins, and order easily. All processing happens in your browser.","uploadTitle":"Add Images (JPG/PNG)","pageSettings":"Page Settings","pageSize":"Page Size","orientation":"Orientation","margin":"Margin","portrait":"Portrait","landscape":"Landscape","auto":"Auto (Fit to Image)","convert":"Generate PDF","converting":"Processing images...","convertSuccess":"PDF generated successfully!","convertError":"Failed to generate PDF. Please check image formats.","resultTitle":"Preview PDF","download":"Download PDF Now","reorder":"Drag to reorder images","addMore":"Add More","dropImages":"Drop Images Here","imageCount":"{count} Images Selected","ready":"READY","guide":{"title":"How to Use","items":["Upload one or more images in common formats like JPG, PNG, or WebP.","Drag the preview thumbnails to adjust their order in the document.","Configure page size (e.g., A4), orientation, or use 'Auto' to match image size.","Click 'Generate PDF' and download your document once ready."]},"knowledge":{"title":"About Image to PDF","items":[{"title":"Supported Formats?","content":"We support JPG/JPEG, PNG, and WebP. We preserve high quality by embedding original image data directly into the PDF."},{"title":"Privacy and Security","content":"Your photos never leave your device. Everything is processed locally in your browser for 100% privacy."}]}},"pdfMerge":{"title":"Merge PDF Files","description":"Combine multiple PDF files into a single document. Drag and drop to reorder files before merging. All processing is done in your browser — no files are uploaded to any server.","uploadTitle":"Upload PDF Files","addMore":"Add More Files","fileList":"File List","mergeAll":"Merge All","merging":"Merging...","mergeSuccess":"PDF files merged successfully!","mergeError":"Failed to merge PDF files. Please try again.","noFiles":"Please add at least 2 PDF files to merge.","totalPages":"Total Pages","dragToReorder":"Drag to reorder files","resultTitle":"Merged PDF","guide":{"title":"How to Use","items":["Click the upload area or drag and drop PDF files to add them.","Add at least 2 PDF files for merging.","Drag and drop files in the list to rearrange their order.","Click the 'Merge All' button to combine the files.","Download the merged PDF file once processing is complete.","All files are processed locally in your browser — nothing is uploaded to any server."]},"knowledge":{"title":"About PDF Merging","items":[{"title":"What is PDF Merging?","content":"PDF merging is the process of combining two or more separate PDF documents into a single file. This is useful for organizing related documents, creating compilations, or combining scanned pages into one cohesive document. The merged PDF preserves all original formatting, images, and text from each source file."},{"title":"Client-Side Processing","content":"This tool processes all PDF files entirely in your browser using JavaScript. No files are uploaded to any server, ensuring complete privacy and security of your documents. The pdf-lib library handles all PDF manipulation operations locally, making it fast and reliable without internet dependency."},{"title":"Preserving Document Quality","content":"When merging PDFs, the original quality of each document is preserved. Text remains searchable, images maintain their resolution, and all formatting stays intact. Unlike some tools that re-render PDFs, this merger copies pages directly, ensuring zero quality loss in the merged output."},{"title":"File Order and Organization","content":"The order in which files appear in the merged document matters. This tool allows you to drag and drop files to rearrange them before merging. The final PDF will contain pages in the exact order you specified, making it easy to create well-organized compilations."}],"featuresTitle":"Key Features","features":["Merge unlimited PDF files into one document","Drag-and-drop file reordering before merge","100% client-side processing — no file uploads","Preserves original formatting and quality","Fast processing with instant download","Works with any standard PDF file"],"applicationsTitle":"Common Use Cases","applications":["Combining multiple scanned documents into one file","Merging report sections into a complete document","Creating PDF compilations from separate chapters","Consolidating invoices or receipts into one file","Assembling presentation materials from multiple sources"]}},"pdfRotate":{"title":"Rotate PDF Pages","description":"Rotate PDF pages by 90°, 180°, or 270°. Select specific pages or rotate the entire document. All processing happens in your browser.","uploadTitle":"Upload PDF File","rotateAngle":"Rotation Angle","rotateScope":"Apply To","allPages":"All Pages","selectedPages":"Selected Pages","pageSelection":"Page Selection","pageSelectionPlaceholder":"e.g., 1, 3-5, 8","rotate":"Rotate PDF","rotating":"Rotating...","rotateSuccess":"PDF rotated successfully!","rotateError":"Failed to rotate PDF. Please try again.","totalPages":"Total Pages","resultTitle":"Rotated PDF","clockwise90":"90° Clockwise","clockwise180":"180°","clockwise270":"270° (90° Counter-clockwise)","guide":{"title":"How to Use","items":["Upload a PDF file by clicking the upload area or dragging and dropping.","Select the desired rotation angle: 90°, 180°, or 270°.","Choose whether to rotate all pages or specific pages.","If rotating specific pages, enter the page numbers (e.g., '1, 3-5, 8').","Click 'Rotate PDF' to apply the rotation.","Download the rotated PDF file."]},"knowledge":{"title":"About PDF Rotation","items":[{"title":"Why Rotate PDF Pages?","content":"PDF page rotation is commonly needed when documents are scanned in the wrong orientation, when combining pages from different sources with varying orientations, or when preparing documents for specific printing requirements. Rotation corrects the viewing angle without affecting the content."},{"title":"Rotation Angles Explained","content":"Pages can be rotated by 90° (clockwise quarter turn), 180° (upside down flip), or 270° (counter-clockwise quarter turn, equivalent to 90° counter-clockwise). The rotation is applied to the entire page including all content, images, and annotations."},{"title":"Selective vs. Full Rotation","content":"You can choose to rotate all pages in the document at once, or select specific pages to rotate. This is particularly useful when only certain pages in a mixed-orientation document need correction, such as landscape tables within a portrait document."},{"title":"Non-Destructive Processing","content":"PDF rotation is a metadata-level operation that changes the page display angle without re-rendering the content. This means all text, images, and vector graphics maintain their original quality. The rotation information is stored in the PDF page dictionary."}],"featuresTitle":"Key Features","features":["Rotate pages by 90°, 180°, or 270°","Rotate all pages or select specific pages","Flexible page selection with ranges","100% client-side processing","Non-destructive rotation preserves quality","Instant processing and download"],"applicationsTitle":"Common Use Cases","applications":["Correcting scanned documents with wrong orientation","Fixing landscape pages in portrait documents","Preparing documents for printing","Adjusting page orientation for presentations","Standardizing orientation across merged documents"]}},"pdfSplit":{"title":"Split PDF Files","description":"Split a PDF document into multiple files. Extract specific pages or split by page ranges. All processing is done locally in your browser.","uploadTitle":"Upload PDF File","splitMode":"Split Mode","splitByRange":"By Page Range","splitEveryN":"Every N Pages","splitAll":"Every Page","pageRange":"Page Range","pageRangePlaceholder":"e.g., 1-3, 5, 8-10","pagesPerFile":"Pages Per File","split":"Split PDF","splitting":"Splitting...","splitSuccess":"PDF split successfully!","splitError":"Failed to split PDF. Please try again.","totalPages":"Total Pages","resultTitle":"Split Results","downloadAll":"Download All","pages":"pages","guide":{"title":"How to Use","items":["Upload a PDF file by clicking the upload area or dragging and dropping.","Choose a split mode: by page range, every N pages, or every single page.","For page range mode, enter the pages you want to extract (e.g., '1-3, 5, 8-10').","For every N pages mode, specify how many pages each split file should contain.","Click 'Split PDF' to process the document.","Download individual split files or all files at once."]},"knowledge":{"title":"About PDF Splitting","items":[{"title":"What is PDF Splitting?","content":"PDF splitting is the process of dividing a single PDF document into multiple smaller files. This is useful when you need to extract specific pages, break a large document into chapters, or separate combined scans into individual documents. Each resulting file is a fully independent PDF."},{"title":"Page Range Syntax","content":"The page range syntax allows flexible page selection. Use hyphens for ranges (e.g., '1-5') and commas to separate multiple selections (e.g., '1-3, 7, 10-12'). Pages are numbered starting from 1. You can combine individual pages and ranges in any order."},{"title":"Browser-Based Processing","content":"This tool processes PDF files entirely in your web browser using the pdf-lib JavaScript library. Your documents never leave your device, ensuring complete privacy and data security. The processing is fast and works offline once the page is loaded."},{"title":"Quality Preservation","content":"When splitting PDFs, all original content quality is maintained. Text, images, vector graphics, and annotations are preserved exactly as they appear in the source document. The splitting process copies pages directly without re-rendering, ensuring no quality degradation."}],"featuresTitle":"Key Features","features":["Three split modes: by range, every N pages, or single pages","Flexible page range syntax with ranges and individual pages","100% client-side processing for privacy","Preserves original document quality","Download individual files or all at once","Supports large PDF documents"],"applicationsTitle":"Common Use Cases","applications":["Extracting specific chapters from a book PDF","Separating individual pages from a scanned document","Breaking a large report into smaller sections","Extracting forms or certificates from a multi-page PDF","Creating page samples from lengthy documents"]}},"pdfToImage":{"title":"PDF to Image","description":"Convert PDF pages into high-quality JPG or PNG images online. Support for batch export and ZIP download. All processing happens in your browser.","uploadTitle":"Upload PDF File","format":"Export Format","quality":"Image Quality","convert":"Convert Now","converting":"Converting page {current} of {total}...","convertSuccess":"PDF converted successfully!","convertError":"Error occurred during PDF conversion.","resultTitle":"Converted Images","downloadAll":"Download All (ZIP)","downloadAs":"Download as {format}","preview":"Preview","page":"Page {number}","qualityLow":"Small Size","qualityHigh":"Best Quality","processingLocal":"Processing in browser local","imagesGenerated":"{count} Images Generated","guide":{"title":"How to Use","items":["Upload or drag your PDF file into the box.","Choose your desired export format (JPG or PNG) and quality.","Click 'Convert Now' to start rendering each page.","Once done, preview the images or download them all as a ZIP file.","Note: Complex PDFs may take longer to process."]},"knowledge":{"title":"About PDF to Image","items":[{"title":"JPG vs PNG?","content":"JPG is best for photo content with smaller file size. PNG is a lossless format that preserves transparency and is ideal for text-heavy documents."},{"title":"Quality Settings","content":"For JPG, you can adjust quality from 0.1 to 1.0. Higher quality means clearer images but larger ZIP files."}]}},"pdfWatermark":{"title":"Add Watermark to PDF","description":"Add customizable text watermarks to your PDF documents. Set font size, color, opacity, and rotation angle. All processing is done in your browser.","uploadTitle":"Upload PDF File","watermarkText":"Watermark Text","watermarkTextPlaceholder":"Enter watermark text...","fontSize":"Font Size","opacity":"Opacity","rotation":"Rotation Angle","color":"Text Color","position":"Position","positionCenter":"Center","positionTiled":"Tiled","addWatermark":"Add Watermark","adding":"Adding watermark...","watermarkSuccess":"Watermark added successfully!","watermarkError":"Failed to add watermark. Please try again.","noText":"Please enter watermark text.","resultTitle":"Watermarked PDF","guide":{"title":"How to Use","items":["Upload a PDF file by clicking the upload area or dragging and dropping.","Enter the watermark text you want to add.","Customize the appearance: font size, opacity, rotation angle, and color.","Choose the watermark position: center or tiled across the page.","Click 'Add Watermark' to apply the watermark to all pages.","Download the watermarked PDF file."]},"knowledge":{"title":"About PDF Watermarks","items":[{"title":"What are PDF Watermarks?","content":"PDF watermarks are text or image overlays placed on document pages to indicate ownership, confidentiality, or draft status. They serve as visual markers that convey important information about the document without obscuring the main content. Common watermark texts include 'CONFIDENTIAL', 'DRAFT', 'SAMPLE', and company names."},{"title":"Text vs. Image Watermarks","content":"This tool supports text-based watermarks, which are created by drawing text directly on each PDF page. Text watermarks are lightweight, easily customizable, and can be adjusted for size, color, opacity, and angle. They are ideal for marking documents with status labels, dates, or ownership information."},{"title":"Opacity and Visibility","content":"Watermark opacity controls how transparent the watermark appears over the document content. Lower opacity values make the watermark more subtle and less intrusive, while higher values make it more prominent. A typical opacity setting of 20-30% provides good visibility without significantly obscuring the underlying text."},{"title":"Tiled vs. Centered Watermarks","content":"Centered watermarks place a single large watermark in the middle of each page, ideal for clear status indicators. Tiled watermarks repeat the text across the entire page in a grid pattern, providing more thorough coverage that's harder to crop out, making them better for copyright protection."}],"featuresTitle":"Key Features","features":["Customizable text watermarks on all pages","Adjustable font size, color, and opacity","Configurable rotation angle","Center or tiled watermark placement","100% client-side processing for security","Works with any standard PDF document"],"applicationsTitle":"Common Use Cases","applications":["Marking documents as CONFIDENTIAL or DRAFT","Adding company branding to shared documents","Protecting intellectual property and copyrights","Indicating document review status","Adding date stamps or version numbers to PDFs"]}},"percentageCalculator":{"title":"Percentage Calculator","description":"Calculate percentages, percentage change, and percentage difference easily.","keywords":"percentage calculator, calculate percentage, percentage change, percent off","category":"Math","type":"What is {0}% of {1}?","result":"Result","calculate":"Calculate","clear":"Clear","commonCalculations":"Common Calculations","whatIsPercentageOf":"What is {0}% of {1}?","percentageOfWhatIs":"{0} is what % of {1}?","percentageIncreaseDecrease":"Percentage Increase/Decrease from {0} to {1}?","guide":{"title":"How to use","items":["Select the type of percentage calculation you want to perform.","Enter the required numbers in the input fields.","The result will be calculated automatically."]},"knowledge":{"title":"About Percentages","introduction":"A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, \"%\"","items":[{"title":"Formula","content":"P% of X = (P/100) * X"}],"featuresTitle":"Features","features":["Calculate percentage value","Calculate percentage change (increase/decrease)","Reverse percentage calculation"],"applicationsTitle":"Applications","applications":["Financial calculations (interest, discounts)","Statistics and data analysis","Academic grading"]}},"percentileCalculator":{"title":"Percentile Calculator","description":"Calculate the value at a specific percentile for a given dataset.","dataset":"Dataset","datasetPlaceholder":"e.g., 10, 20, 30, 40, 50","percentile":"Percentile (0-100)","percentilePlaceholder":"e.g., 90","calculate":"Calculate","clear":"Clear","result":"Result","invalidDataset":"Please enter a valid sequence of numbers.","invalidPercentile":"Percentile must be a number between 0 and 100.","guide":{"title":"How to Use","items":["Enter a sequence of numbers representing your dataset.","Enter the target percentile (between 0 and 100).","Click 'Calculate' to find the value at that percentile."]},"knowledge":{"title":"About Percentiles","introduction":"A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls.","items":[{"title":"Definition","content":"For example, the 20th percentile is the value below which 20% of the observations may be found. The 50th percentile is the median."},{"title":"Calculation Method","content":"This calculator uses the linear interpolation method between closest ranks (also known as the R-6 or continuous sample method), which is common in statistical software."}],"featuresTitle":"Key Features","features":["Calculates any percentile from 0 to 100.","Uses standard linear interpolation for continuous data."],"applicationsTitle":"Applications","applications":["Standardized test scores analysis.","Growth charts in pediatrics.","Salary benchmarking."]}},"pgp-key-generator":{"title":"PGP Key Generator","config":{"title":"PGP Identity & Parameters","name":"Full Name","email":"Email Address","passphrase":"Passphrase","algorithm":"Encryption Type","generateBtn":"Generate PGP Keys"},"results":{"title":"PGP Keys Generated (ASCII Armor)","publicKey":"Public PGP Block","privateKey":"Private PGP Block"}},"picker":{"title":"Online Color Picker","description":"An intuitive and fast online color selection tool, supporting code export in multiple formats.","selectColor":"Select Color","hex":"HEX","rgb":"RGB","hsl":"HSL","hsv":"HSV","presets":"Preset Colors","copySuccess":"Color code copied","guide":{"title":"Usage Guide","items":["Use the color wheel or sliders to choose your desired color.","The HEX, RGB, HSL, and HSV codes for that color will be displayed in real-time below.","Click the copy button next to each format to quickly get the color code.","You can also click the preset colors below to quickly select common colors."]},"knowledge":{"title":"About Color Picker","items":[{"title":"What is a Color Picker?","content":"A color picker is a graphical user interface component that allows users to select colors from the visible spectrum in an intuitive way, commonly used in design, web development, and image processing."},{"title":"Common Color Models","content":"HEX (Hexadecimal), RGB (Red, Green, Blue), HSL (Hue, Saturation, Lightness), and HSV (Hue, Saturation, Value) are the most commonly used color representation methods in computing. Each model has its advantages in different application scenarios."}]}},"pingTool":{"title":"Ping Tool","description":"Test connectivity to a server or website using ICMP packets.","input":"Host / IP Address","inputPlaceholder":"Enter a host or IP (e.g., google.com)","ping":"Ping","loading":"Pinging...","error":"Ping failed. Please check the host and try again.","results":{"title":"Ping Results","packetsTransmitted":"Packets Transmitted","packetsReceived":"Packets Received","packetLoss":"Packet Loss","time":"Time","roundTrip":"Round Trip (min/avg/max/mdev)"},"guide":{"title":"How to use Ping Tool","items":["Enter a hostname or IP address in the input field.","Click the 'Ping' button.","Wait for the results to see packet loss and latency statistics."]},"knowledge":{"title":"About Ping","items":[{"title":"ICMP","content":"Ping uses the Internet Control Message Protocol (ICMP) Echo Request messages to test reachability."},{"title":"Latency","content":"The time it takes for a packet to travel from source to destination and back is called Round-Trip Time (RTT) or latency."}],"featuresTitle":"Features","features":["Standard ICMP Ping","Packet loss calculation","Latency measurement"],"applicationsTitle":"Applications","applications":["Testing network connectivity","Diagnosing network issues","Measuring server response time"]}},"placeholderGenerator":{"title":"Placeholder Generator","description":"Placeholder Generator is used to process images.","uploadTitle":"Upload Image","guide":{"title":"Guide","items":["Click to upload or drag and drop an image into the area.","Adjust parameters as needed.","View the result and download it."]},"knowledge":{"title":"Knowledge","items":[{"title":"What is Placeholder Generator","content":"Processing image features for specific purposes."}],"featuresTitle":"Features","features":["Processed locally in the browser, secure and fast.","No file size limit (limited by device memory)."],"applicationsTitle":"Applications","applications":["Daily image processing needs."]},"settings":"Placeholder Settings","bgColor":"Background Color","textColor":"Text Color","text":"Custom Text","format":"Format","generate":"Generate","copyUrl":"Copy Image URL"},"pngToJpg":{"title":"PNG to JPG Converter","description":"Convert PNG images to JPG/JPEG format with adjustable quality","uploadTitle":"Upload PNG Image","resultTitle":"Converted JPG Image","guide":{"title":"How to Use","items":["Click the upload area or drag and drop a PNG image file","The image will be displayed as a preview after upload","Adjust the quality slider to set JPG compression level (higher = better quality, larger file)","Click the 'Convert' button to convert to JPG format","The converted JPG image will be shown with a preview and file size","Click 'Download' to save the JPG file to your device","Note: PNG transparency will be replaced with a white background in JPG"]},"knowledge":{"title":"About PNG to JPG Conversion","items":[{"title":"Why Convert PNG to JPG?","content":"JPG (JPEG) uses lossy compression that significantly reduces file size compared to PNG, especially for photographs and images with smooth color gradients. This makes JPG ideal for web usage, email attachments, and storage optimization where smaller file sizes are more important than perfect quality preservation."},{"title":"Understanding JPG Quality Settings","content":"The quality slider controls the compression ratio of the JPG output. At 100%, minimal compression is applied, preserving most detail but with larger files. At lower settings (60-80%), significant size reduction is achieved with minimal visible quality loss for most photos. Settings below 50% may show noticeable compression artifacts."},{"title":"Transparency Handling","content":"JPG format does not support transparency (alpha channel). When converting PNG images with transparent areas, those areas are automatically filled with a white background. If you need to preserve transparency, consider keeping the image in PNG or WebP format instead."},{"title":"Privacy & Security","content":"All image processing happens entirely in your browser using HTML5 Canvas API. No files are uploaded to any server, ensuring your images remain completely private. The tool works offline once loaded, making it safe for sensitive or confidential images."}],"featuresTitle":"Key Features","features":["Adjustable JPG quality from 10% to 100%","Real-time file size preview for converted images","100% browser-based processing for complete privacy","Supports large PNG files up to 50MB"],"applicationsTitle":"Common Use Cases","applications":["Reducing image file size for web pages and email","Converting screenshots to JPG for documentation","Batch-preparing photos for social media upload","Optimizing storage by converting large PNG archives"]}},"pomodoro":{"title":"Pomodoro Focus Timer","description":"Increase productivity using the Pomodoro technique.","focus":"Focus","shortBreak":"Short Break","longBreak":"Long Break","start":"Start","pause":"Pause","resume":"Resume","reset":"Reset","settings":"Timer Settings","focusDuration":"Focus Duration (min)","shortBreakDuration":"Short Break Duration (min)","longBreakDuration":"Long Break Duration (min)","longBreakInterval":"Long Break Interval (sessions)","currentSession":"Current Session","completedSessions":"Completed Sessions","taskName":"What are you working on?","volumeOn":"Sound On","volumeOff":"Sound Off","save":"Save","cancel":"Cancel","autoStart":"Auto-start next session","notification":"Browser notifications","notifyPermissionDenied":"Notification permission denied","notifyTitle":"Pomodoro Complete","notifyFocusDone":"Focus session complete! Time for a break.","notifyBreakDone":"Break is over! Ready to focus?","startFocus":"Start Focus","startShortBreak":"Start Short Break","startLongBreak":"Start Long Break","guide":{"title":"How to Use","items":["Click the Play button to start a 25-minute focus session.","When the session ends, a popup appears — choose to start a short or long break.","After every 4 focus sessions, a long break is automatically suggested.","Use the gear icon to customize durations, enable auto-start, and toggle notifications.","Enter a task name in the text field to track what you are working on."]},"knowledge":{"title":"About the Pomodoro Technique","sections":[{"title":"Origin","content":"The Pomodoro Technique was developed by Francesco Cirillo in the late 1980s using a tomato-shaped kitchen timer ('pomodoro' in Italian) to track 25-minute work intervals."},{"title":"Why It Works","content":"Short focused sessions with scheduled breaks prevent mental fatigue, improve concentration, and make large tasks manageable by breaking them into timed intervals."},{"title":"Customization Tips","content":"Adjust focus duration (15–50 min) and break lengths to match your rhythm. Many find 25/5 ideal for coding, while 50/10 suits deep reading or writing."}]}},"portChecker":{"title":"Port Checker","description":"Check if a specific TCP port is open on a server or a device.","input":{"hostLabel":"Host","hostPlaceholder":"e.g., google.com or 8.8.8.8","portLabel":"Port","portPlaceholder":"e.g., 80, 443","button":"Check Port"},"result":{"open":"Port is OPEN","closed":"Port is CLOSED or Filtered","error":"Error"},"guide":{"title":"How to use Port Checker","items":["Enter the hostname or IP address of the target server.","Enter the port number you want to check (1-65535).","Click 'Check Port' to see if the port is accessible."]},"knowledge":{"title":"About Port Scanning","items":[{"title":"Open Port","content":"An open port accepts TCP connections. It usually indicates a service is listening on that port."},{"title":"Closed/Filtered Port","content":"A closed port rejects connections, while a filtered port drops packets (often due to a firewall)."},{"title":"Common Ports","content":"80 (HTTP), 443 (HTTPS), 21 (FTP), 22 (SSH), 25 (SMTP), 3306 (MySQL)."}]}},"primeChecker":{"title":"Prime Checker","description":"Check if a number is prime or composite. Find factors of composite numbers.","keywords":"prime checker, is prime, prime number test, factor finder","category":"Math","number":"Number","check":"Check","result":"Result","clear":"Clear","isPrime":"{0} is a Prime Number.","isComposite":"{0} is a Composite Number.","factors":"Factors: {0}","guide":{"title":"How to Use","items":["Enter a positive integer.","Click 'Check' to see if it's prime.","If composite, its factors will be displayed."]},"knowledge":{"title":"About Prime Numbers","introduction":"A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers.","items":[{"title":"Definition","content":"A number greater than 1 with exactly two factors: 1 and itself."}],"featuresTitle":"Features","features":["Instant prime verification","Factor listing for composite numbers","Support for large integers"],"applicationsTitle":"Applications","applications":["Cryptography (RSA)","Number Theory","Computer Science"]}},"primeFactorization":{"title":"Prime Factorization","description":"Decompose an integer into its prime factors.","keywords":"prime factorization, prime factors, factor calculator, decomposition","category":"Math","number":"Number","calculate":"Calculate","result":"Prime Factors","clear":"Clear","guide":{"title":"How to Use","items":["Enter a positive integer.","Click 'Calculate'.","The tool will show the product of its prime factors."]},"knowledge":{"title":"About Prime Factorization","introduction":"Prime factorization is the process of determining which prime numbers multiply together to make the original number.","items":[{"title":"Fundamental Theorem of Arithmetic","content":"Every integer greater than 1 is either a prime itself or can be represented as the product of prime numbers in a unique way."}],"featuresTitle":"Features","features":["Decompose numbers into primes","Canonical representation (e.g., 2^3 * 3)"],"applicationsTitle":"Applications","applications":["Cryptography","Simplifying fractions","Finding GCD and LCM"]}},"primeGenerator":{"title":"Prime Number Generator","description":"Generate a list of prime numbers within a range.","keywords":"prime number generator, list of primes, generate primes","category":"Math","start":"Start","end":"End","count":"limit","generate":"Generate","clear":"Clear","result":"Prime Numbers","countResult":"Count: {0}","guide":{"title":"How to Use","items":["Enter the start and end of the range.","Click 'Generate'.","All prime numbers within the range will be listed."]},"knowledge":{"title":"About Primes","introduction":"A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.","items":[{"title":"Sieve of Eratosthenes","content":"An efficient algorithm for finding all prime numbers up to any given limit."}],"featuresTitle":"Features","features":["Generate primes in a specific range","Count total primes found","Copy list to clipboard"],"applicationsTitle":"Applications","applications":["Cryptography","Mathematical research","Programming problems"]}},"privacy":{"title":"Privacy Policy","lastUpdated":"Last Updated: July 17, 2025","introduction":{"title":"Privacy Policy Overview","content":"Online Calculator Tools highly values user privacy protection. This Privacy Policy details how we collect, use, store, and protect your personal information. We are committed to handling your personal information in accordance with this policy and applicable laws and regulations.\n\nPlease read this Privacy Policy carefully. If you do not agree with any content of this policy, please do not use our services. Continued use of our services indicates your agreement to this Privacy Policy."},"sections":[{"title":"1. Information Collection","content":"We may collect the following types of information:","items":["Automatically collected information: Access IP addresses, browser types, operating systems, access times, page browsing records, and other technical information","Usage data: Tool usage frequency, feature preferences, error logs, and other anonymized usage statistics","Contact information: Email addresses and related inquiry content provided when you actively contact us","Cookies information: Necessary cookies data used to improve user experience and website functionality"]},{"title":"2. Information Usage Purposes","content":"We collect information for the following purposes:","items":["Provide and maintain website service functionality","Analyze website usage to optimize user experience","Provide technical support and problem solving","Send important service notifications and updates","Prevent security threats and malicious behavior","Comply with legal and regulatory requirements"]},{"title":"3. Data Processing Principles","content":"We follow these data processing principles:","items":["Local priority: Tool functions prioritize processing on user devices locally, reducing data transmission","Minimize collection: Only collect the minimum information necessary to provide services","Anonymization processing: Anonymize statistical data so specific individuals cannot be identified","Transparency principle: Clearly inform about data collection and usage purposes","User control: Users can choose whether to provide certain information"]},{"title":"4. Information Sharing and Disclosure","content":"We do not sell, rent, or trade your personal information. Information may be shared only in the following circumstances:","items":["With your explicit consent","As required by laws and regulations or government departments","To protect our or users' legitimate interests","In cooperation with trusted third-party service providers (such as website hosting services), provided these providers agree to protect your information","Anonymized statistical data that cannot identify specific individuals"]},{"title":"5. Data Security Protection","content":"We take the following measures to protect your information security:","items":["Use HTTPS encryption transmission technology","Implement access control and identity authentication","Regularly conduct security assessments and vulnerability fixes","Data backup and disaster recovery mechanisms","Employee data protection training and confidentiality agreements","Third-party security audits and monitoring"]},{"title":"6. Cookies Usage Description","content":"We use Cookies to improve user experience:","items":["Necessary Cookies: Maintain normal operation of basic website functions","Functional Cookies: Remember user preference settings, such as language selection","Analytics Cookies: Understand website usage to optimize service quality","You can control Cookie usage through browser settings, but disabling may affect some functions"]},{"title":"7. User Rights","content":"You have the following rights regarding personal information:","items":["Right to know: Understand how we collect and use your information","Access right: Request to view personal information we hold about you","Correction right: Request correction of inaccurate or incomplete personal information","Deletion right: Request deletion of certain personal information","Processing restriction right: Request limitation of processing of your personal information","Data portability right: Request to obtain your personal information in structured format"]},{"title":"8. Children's Privacy Protection","content":"We take children's privacy protection very seriously:","items":["This website does not provide services to children under 16 years old","We do not knowingly collect children's personal information","If we inadvertently collect children's information, we will delete it immediately","If you are a child's guardian and discover we have collected your child's information, please contact us"]},{"title":"9. International Data Transfer","content":"As our services may involve cross-border data transfer:","items":["We ensure recipients provide adequate data protection levels","Use legal mechanisms such as standard contractual clauses to protect your rights","Prioritize data processing in your local region","Comply with relevant data export laws and regulations"]},{"title":"10. Policy Updates","content":"We may update this Privacy Policy from time to time:","items":["Major changes will be notified through website announcements or emails","Updated policies will be published on the website","Continued use of services is deemed as agreement to updated policies","We recommend regularly checking the latest version of this policy"]},{"title":"11. Contact Us","content":"If you have any questions about this Privacy Policy or need to exercise your rights, please contact us through the following method:","contact":{"email":"support@calctools.online","subject":"Privacy Policy Inquiry","responseTime":"We will respond to you within 7 business days after receiving the request"}}]},"punycodeEncoder":{"convert":{"title":"Punycode Converter","input":"Input","output":"Output","encodeButton":"Encode to ASCII","decodeButton":"Decode to Unicode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter domain or text...","outputPlaceholder":"Result will be displayed here...","mode":"Mode","modes":{"domain":"Domain Name (Handles dots)","text":"Raw Text"}},"error":{"encodeFailed":"Encoding Failed","decodeFailed":"Decoding Failed"},"guide":{"title":"Instructions","items":["Convert Unicode domains (IDN) to ASCII Punycode (xn--...)","Convert Punycode back to Unicode domains","Domain mode automatically handles parts separated by dots"]},"knowledge":{"title":"Punycode Knowledge","items":[{"title":"What is Punycode?","content":"Punycode is a representation of Unicode with the limited ASCII character subset used for Internet hostnames."},{"title":"Internationalized Domain Names (IDN)","content":"Allows domain names to contain characters from local languages (e.g., Chinese, Arabic) while remaining compatible with the DNS system."}],"featuresTitle":"Key Features","features":["Uniquely and reversibly transforms Unicode strings to ASCII","Prefixed with 'xn--' in domain names","Standardized in RFC 3492"],"applicationsTitle":"Common Applications","applications":["Registering international domain names","Email systems supporting internationalization","DNS configuration"]}},"pythagorean":{"seoTitle":"Pythagorean Theorem Calculator | TE Cyber","seoDescription":"Free online Pythagorean Theorem calculator. Calculate the hypotenuse or one of the legs of a right-angled triangle.","title":"Pythagorean Theorem Calculator","description":"Calculate the length of a hypotenuse or leg of a right triangle using the Pythagorean Theorem.","solveFor":"Solve For","hypotenuse":"Hypotenuse (c)","legA":"Leg (a)","legB":"Leg (b)","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter valid positive numbers.","invalidTriangle":"The hypotenuse must be longer than the other leg.","guide":{"title":"How to Use","items":["Select what you want to solve for (Hypotenuse, Leg a, or Leg b).","Enter the lengths of the two known sides.","Click 'Calculate' to find the length of the unknown side."]},"knowledge":{"title":"About Pythagorean Theorem","introduction":"In mathematics, the Pythagorean theorem is a fundamental relation in Euclidean geometry among the three sides of a right triangle.","items":[{"title":"Formula","content":"The theorem states that the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares on the other two sides: a² + b² = c²."},{"title":"Finding a Leg","content":"To find the length of one of the shorter sides (legs), use the formula rearranging: a = √(c² - b²) or b = √(c² - a²)."}],"featuresTitle":"Properties","features":["Applies only to right-angled triangles.","The hypotenuse is always the longest side.","Pythagorean triples are integer sets that perfectly fit the equation (e.g., 3, 4, 5)."],"applicationsTitle":"Applications","applications":["Construction and architecture to ensure square corners.","Navigation to find the shortest distance between two points.","Surveying and cartography."]}},"qrReader":{"title":"QR Code Reader & Decoder","description":"Upload or paste images containing QR codes to quickly decode their content. Supports multiple image formats.","labels":{"dragDrop":"Click or drag image to scan","uploadHint":"Supports single file upload. You can also paste an image directly from your clipboard.","preview":"Image Preview","result":"Recognition Result"},"buttons":{"paste":"Paste from Clipboard","openLink":"Open Link"},"messages":{"scanSuccess":"QR Code recognized!","analyzing":"Analyzing image...","uploadInstruction":"Upload an image to start decoding","noImageInClipboard":"No image found in clipboard."},"errors":{"noQrFound":"No QR Code found in this image.","clipboardRead":"Failed to read clipboard."},"guide":{"title":"How to use","items":["Supported formats: JPG, PNG, WebP, etc.","Ensure the QR code is clearly visible and not too distorted.","If recognition fails, try taking a clearer screenshot or cropping the image to focus on the QR code."]},"knowledge":{"title":"About QR Recognition","items":[{"title":"Static Image Decoding","content":"Unlike real-time scanning, decoding from an image allows for deeper pre-processing like binarization and noise reduction to extract data from static files."},{"title":"Error Correction","content":"QR codes feature built-in error correction (levels L, M, Q, H). This allows the data to be recovered even if the image is partially damaged or obscured (up to 30% loss)."}]}},"qrScanner":{"title":"Online QR Code Scanner","description":"Use your camera to scan and decode QR codes in real-time. Secure and privacy-focused.","labels":{"selectCamera":"Select Camera","cameraDefault":"Camera {id}","result":"Scan Result"},"placeholders":{"selectCamera":"Select a camera"},"buttons":{"start":"Start Scanning","stop":"Stop Camera","openLink":"Open Link","refresh":"Refresh Cameras","clear":"Clear Result"},"messages":{"scanSuccess":"QR Code scanned successfully!","waiting":"Waiting for a QR code..."},"errors":{"cameraPermission":"Unable to access camera. Please check permissions.","cameraStart":"Failed to start camera"},"scannerView":{"inactive":"Camera is inactive. Choose a camera and click start."},"guide":{"title":"User Guide","items":["Grant camera permissions when prompted.","Select the appropriate camera from the list.","Point the QR code towards the center of the camera view.","Hold steady until the code is recognized."]},"knowledge":{"title":"About QR Scanning","items":[{"title":"How it works","content":"The scanner captures video frames and looks for positioning patterns (the three large squares). Once found, it corrects perspective, decodes the bitmask, and applies Reed-Solomon error correction."},{"title":"Scanning Tips","content":"Ensure good lighting and avoid glare. If recognition is slow, try moving the camera closer or further until the focus locks on the pattern."}]}},"qrcodeCommon":{"customization":"Customization","size":"Size","color":"Color","bgColor":"Background Color","errorCorrection":"Error Correction","logoLabel":"QR Code Logo","logoUpload":"Upload Image","logoSize":"Logo Size","bordered":"Show Border","removeLogo":"Remove Logo","download":"Download QR Code"},"qrcodeEmail":{"title":"Email QR Code","description":"Generate an Email QR code with recipient, subject, and body for instant emailing","emailLabel":"Recipient Email","emailPlaceholder":"example@domain.com","subjectLabel":"Email Subject","subjectPlaceholder":"Enter email subject","bodyLabel":"Email Body","bodyPlaceholder":"Enter email message","customization":"Customization","size":"Size","color":"Color","bgColor":"Background Color","errorCorrection":"Error Correction","logoLabel":"QR Code Logo","logoUpload":"Upload Image","logoSize":"Logo Size","bordered":"Show Border","download":"Download QR Code","guide":{"title":"How to Use","items":["Enter the recipient's email address.","Fill in the email subject and body content (optional).","Customize the QR code size, color, and Logo as needed.","Click the download button to save the generated QR code image."]},"knowledge":{"title":"About Email QR Code","items":[{"title":"Email QR Format","content":"It usually uses MATMSG or mailto: protocol. When a phone scans this type of QR code, it will automatically open the default email app and pre-fill details."},{"title":"Use Cases","content":"Perfect for customer support, event registration, or resume submission, simplifying the messaging process by scanning."}]}},"qrcodeGenerator":{"title":"QR Code Generator","description":"Custom generate various text and link QR codes","inputLabel":"Content","inputPlaceholder":"Enter text or link to generate QR code...","customization":"Styles","size":"Size (px)","errorCorrection":"Error Level","color":"Foreground","bgColor":"Background","bordered":"Show Border","logoLabel":"Center Logo","logoUpload":"Upload Image","logoSize":"Logo Size","download":"Download QR Code","downloadSize":"Download Size"},"qrcodeLocation":{"title":"Location QR Code","description":"Generate a QR code based on geographic location (lat/lon) for direct navigation","latLabel":"Latitude","latPlaceholder":"e.g., 39.9042","lonLabel":"Longitude","lonPlaceholder":"e.g., 116.4074","customization":"Customization","size":"Size","color":"Color","bgColor":"Background Color","errorCorrection":"Error Correction","logoLabel":"QR Code Logo","logoUpload":"Upload Image","logoSize":"Logo Size","bordered":"Show Border","download":"Download QR Code","guide":{"title":"How to Use","items":["Enter the latitude and longitude coordinates of the destination.","You can get precise coordinates via map tools or a phone compass.","Set the QR code style to match your brand vision.","Download the QR code and display it in physical stores or event flyers."]},"knowledge":{"title":"About Location QR Code","items":[{"title":"GEO Protocol","content":"Usually uses the geo:lat,lon format. After scanning, the system asks to open a map app (Google Maps, Apple Maps, etc.) for positioning."},{"title":"Accuracy","content":"Ensure coordinates are accurate. If coordinates are off, navigation may lead to the wrong place."}]}},"qrcodePhone":{"title":"Phone QR Code","description":"Create a dialing QR code that automatically jumps to the phone dialer after scanning","phoneLabel":"Phone Number","phonePlaceholder":"Enter phone number to dial","customization":"Customization","size":"Size","color":"Color","bgColor":"Background Color","errorCorrection":"Error Correction","logoLabel":"QR Code Logo","logoUpload":"Upload Image","logoSize":"Logo Size","bordered":"Show Border","download":"Download QR Code","guide":{"title":"How to Use","items":["Fill in the complete phone number in the input box (including area code suggested).","Adjust the QR code style, color, or upload your brand Logo.","Click download once you are satisfied with the generated QR code.","Test scanning to ensure it opens the dialer correctly."]},"knowledge":{"title":"About Phone QR Code","items":[{"title":"TEL Protocol","content":"Phone QR codes use the tel: link format. This is a standard format supported by almost all modern smartphones for scanning and dialing."},{"title":"Advantages","content":"Scanning avoids typing errors manually, especially useful on billboards or business cards."}]}},"qrcodeSms":{"title":"SMS QR Code","description":"Generate a QR code with phone number and message for instant SMS sending","phoneLabel":"Recipient Phone","phonePlaceholder":"Enter phone number","messageLabel":"SMS Content","messagePlaceholder":"Enter preset SMS message","customization":"Customization","size":"Size","color":"Color","bgColor":"Background Color","errorCorrection":"Error Correction","logoLabel":"QR Code Logo","logoUpload":"Upload Image","logoSize":"Logo Size","bordered":"Show Border","download":"Download QR Code","guide":{"title":"How to Use","items":["Enter the recipient's phone number.","Enter the preset SMS text content.","You can customize the QR code and add an icon in the center.","Click download to save the image for printing or online sharing."]},"knowledge":{"title":"About SMS QR Code","items":[{"title":"How it Works","content":"Uses the SMSTO protocol. After scanning, the phone prepares to send an SMS with specific content to the designated number, requiring only a click to send."},{"title":"Security","content":"The QR code itself doesn't send the SMS, it only triggers the phone's dialer/SMS function. Security depends on the user's confirmation."}]}},"qrcodeUrl":{"title":"URL QR Code","description":"Quickly generate QR codes with Logo for web links","urlLabel":"URL","urlPlaceholder":"https://example.com","customization":"Styles","size":"Size (px)","errorCorrection":"Error Level","color":"Foreground","bgColor":"Background","bordered":"Show Border","logoLabel":"Center Logo","logoUpload":"Upload Image","logoSize":"Logo Size","download":"Download QR Code"},"qrcodeVcard":{"title":"vCard QR Code","description":"Create personal vCard QR codes to save to address book instantly","firstName":"First Name","lastName":"Last Name","organization":"Organization","titleName":"Position","phone":"Phone","email":"Email","url":"Website","address":"Address","customization":"Styles","size":"Size (px)","errorCorrection":"Error Level","color":"Foreground","bgColor":"Background","bordered":"Show Border","logoLabel":"Center Logo","logoUpload":"Upload Image","logoSize":"Logo Size","download":"Download QR Code"},"qrcodeWifi":{"title":"WiFi QR Code","description":"Scan to connect directly to specified WiFi network","networkName":"Network (SSID)","networkNamePlaceholder":"Your WiFi Name","password":"Password","passwordPlaceholder":"Leave blank if no password","encryption":"Encryption","hidden":"Hidden Network","customization":"Styles","size":"Size (px)","errorCorrection":"Error Level","color":"Foreground","bgColor":"Background","bordered":"Show Border","logoLabel":"Center Logo","logoUpload":"Upload Image","logoSize":"Logo Size","download":"Download QR Code"},"quotedPrintableEncoder":{"convert":{"title":"Quoted-Printable Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"Instructions","items":["Encode text to Quoted-Printable format","Decode QP encoded strings back to text","Commonly used for email MIME encoding"]},"knowledge":{"title":"Quoted-Printable Knowledge","items":[{"title":"What is Quoted-Printable?","content":"Quoted-Printable is part of the MIME standard, used to encode 8-bit data as 7-bit ASCII, primarily for email transmission."},{"title":"Encoding Rules","content":"Printable ASCII characters are transmitted directly, non-ASCII characters are encoded as =XX format (XX being hexadecimal value), with a maximum of 76 characters per line."}],"featuresTitle":"Key Features","features":["MIME standard (RFC 2045)","ASCII text remains readable","Soft line break support (=CRLF)"],"applicationsTitle":"Common Applications","applications":["Email body encoding","MIME multipart messages","HTTP form data"]}},"random-address":{"title":"Random Address Generator","description":"Generate random addresses based on real-world geographical logic, including streets, cities, zip codes, and countries.","settings":{"title":"Settings","quantity":"Quantity","locale":"Select Locale","locales":{"zh_CN":"China","en_US":"USA","en_GB":"UK","es_ES":"Spain","fr_FR":"France","de_DE":"Germany","ja_JP":"Japan"},"generate":"Generate Now","copyAll":"Copy All"},"results":{"title":"Results","empty":"Click the button above to start generating","clear":"Clear"},"guide":{"title":"How to Use","items":["Set the quantity of addresses to generate.","Select a target country/region. Formatting rules like state/province and zip codes vary by locale.","Click 'Generate Now' to get simulated geographical data.","Address components are algorithmically generated for development and design purposes."]},"knowledge":{"title":"About Random Addresses","items":[{"title":"Realism and Accuracy","content":"Addresses contain real city names, street suffixes, and valid zip code patterns, but the specific combination of street and house number is synthetic."},{"title":"Use Cases","content":"Perfect for e-commerce prototyping, Map API debugging, database seeding, and privacy demonstrations."}],"featuresTitle":"Key Features","features":["Follows local address formatting order","Accurate zip code logic based on locale","Covers 10+ major linguistic environments","Includes Full-suite data: Country, State, City, and Street"]}},"random-chinese-name":{"title":"Random Chinese Name Generator","description":"Generate realistic random Chinese names including surnames and given names.","settings":{"title":"Name Settings","quantity":"Number of Names","gender":"Gender Preference","both":"Both","male":"Male","female":"Female","style":"Name Style","modern":"Modern","classical":"Classical","book":"Classical Source","books":{"shijing":"Shijing (Book of Songs)","chuci":"Chu Ci (Songs of Chu)","tangshi":"Tang Poetry","songci":"Song Ci","yuefu":"Yuefu Folk Songs","gushi":"300 Ancient Poems","cifu":"Famous Rhapsodies"},"source":"Source","customSurname":"Specify Surname (Optional)","surnamePlaceholder":"e.g. Wang","generate":"Generate","classical_chars":["子","墨","逸","白","寒","轩","羽","灵","清","弦","锦","笙","云","风","月","芷","若","瑶","琰","琛","瑾","瑜","璇","玑","晔","昭","晏","卿","宸","寰","翊","邈","溯","岚","岫","川","岳","峥","嵘","浩"]},"results":{"title":"Generated Chinese Names","copyAll":"Copy All","clear":"Clear","empty":"Click the button above to start generating","error":"Generation failed, please try again"},"guide":{"title":"How to use","items":["Select how many Chinese names you want to generate.","Set gender preference for the given names.","Choose between 'Modern' or 'Classical' naming styles.","Click 'Generate' and copy your favorite names."]},"knowledge":{"title":"Chinese Naming Culture","items":[{"title":"Structure","content":"Chinese names typically consist of a family name (usually one character) followed by a given name (one or two characters)."},{"title":"Meaning","content":"Given names are carefully chosen based on their meanings and literary connotations, often reflecting parents' wishes."}],"featuresTitle":"Key Features","features":["Natural-sounding name generation","Gender-specific name variants","Large database of common surnames","Cultural style options","High-speed generation"]}},"random-coin-flip":{"settings":{"title":"Coin Flip Settings","quantity":"Number of Flips","flip":"Flip Coin","flipping":"Flipping..."},"results":{"title":"Flip Results","clear":"Clear","empty":"Click the button to flip a coin","heads":"Heads","tails":"Tails","stats":"Total: {total} | Heads: {heads} | Tails: {tails}"},"guide":{"title":"How to Use","steps":["Choose how many times you want to flip the coin.","Click the 'Flip Coin' button to start.","Watch the animation and see the results below.","You can clear the results at any time using the Clear button."]},"knowledge":{"title":"About Coin Flipping","items":[{"title":"Is it truly 50/50?","content":"In a perfect world with a perfectly balanced coin, the probability is exactly 50% for heads and 50% for tails. Our tool uses a secure random number generator to simulate this balance."},{"title":"Use Cases","content":"Coin flipping is a simple way to resolve disputes or make decisions between two equally desirable (or undesirable) options."}]}},"random-color":{"title":"Random Color Generator","description":"Quickly generate random colors in various formats with real-time visual previews.","colorCount":"Number of Colors","maxLimit":"Maximum of 50 colors per generation","generateCount":"Generate {count} Colors","generate":"Random Generate","guide":{"title":"How to Use","items":["Use the slider to set the number of colors you want to generate (1-50).","Click 'Random Generate' to refresh the color list.","When set to 1, a detailed single-color card with immersive preview is shown.","Click HEX, RGB, or HSL buttons on any color card to copy its value."]},"knowledge":{"title":"Color Insights","items":[{"title":"HSL Randomization","content":"We use HSL (Hue, Saturation, Lightness) for generation to ensure perceived color vibrantness and harmony, avoiding dull or overly harsh results."},{"title":"Color Formats","content":"HEX is standard for web; RGB represents the additive primary colors; HSL defines color by its human-perceived properties."}]}},"random-date":{"title":"Random Date Generator","description":"Generate random dates and times within a specified range, supporting customizable output formats.","settings":{"title":"Settings","quantity":"Quantity","startDate":"Start Date","endDate":"End Date","format":"Output Format","generate":"Generate Now","copyAll":"Copy All"},"formats":{"YYYY-MM-DD":"YYYY-MM-DD (2024-03-12)","YYYY/MM/DD":"YYYY/MM/DD (2024/03/12)","MM-DD-YYYY":"MM-DD-YYYY (03-12-2024)","DD-MM-YYYY":"DD-MM-YYYY (12-03-2024)","YYYY-MM-DD HH:mm:ss":"Full Time (2024-03-12 14:30:00)","timestamp":"Timestamp (1710222600000)"},"results":{"title":"Results","empty":"Click the button above to start generating","clear":"Clear"},"guide":{"title":"How to Use","items":["Set the quantity of random dates to generate (up to 100).","Select the start and end date for the random range.","Choose your preferred date display format (ISO, Traditional, or Timestamp).","Click 'Generate Now' and copy individual results or use 'Copy All'."]},"knowledge":{"title":"About Random Dates","items":[{"title":"Uniform Distribution","content":"Dates are generated with uniform random distribution across your specified window, down to the millisecond precision."},{"title":"Testing Utility","content":"Essential for testing database queries, UI date pickers, or time-series charts with large volumes of mock data."}],"featuresTitle":"Key Features","features":["Infinite range support with custom limits","Multiple standard international date formats","Unix milliseconds timestamp support","Fast, private, and client-side only"]}},"random-dice-roller":{"settings":{"title":"Dice Roller Settings","diceCount":"Number of Dice","diceSides":"Number of Sides","roll":"Roll Dice","rolling":"Rolling..."},"results":{"title":"Roll Results","clear":"Clear","empty":"Click the button to roll the dice","total":"Total Sum: {sum}","individual":"Individual Dice: {values}"},"guide":{"title":"How to Use","steps":["Select the number of dice you want to roll.","Choose the number of sides for the dice (common is 6).","Click 'Roll Dice' to generate random numbers.","The total sum and individual results will be shown."]},"knowledge":{"title":"About Dice Rolling","items":[{"title":"Common Dice Types","content":"Standard dice have 6 sides (d6), but role-playing games often use d4, d8, d10, d12, and d20."},{"title":"Probability","content":"Rolling multiple dice changes the probability distribution. For example, with two d6, the most likely sum is 7."}]}},"random-email":{"title":"Random Email Generator","description":"Generate standard random email addresses for testing, registration, or privacy protection.","settings":{"title":"Settings","quantity":"Quantity","domain":"Custom Domain (Optional)","domainPlaceholder":"e.g., example.com","generate":"Generate Now","copyAll":"Copy All"},"results":{"title":"Results","empty":"Click the button above to start generating","clear":"Clear"},"guide":{"title":"How to Use","items":["Set the quantity of emails to generate (supports 1-100).","Optional: specify a custom domain suffix (e.g., gmail.com).","Click 'Generate Now' to get your random email list.","Copy individual results or use 'Copy All' to grab everything at once."]},"knowledge":{"title":"About Random Emails","items":[{"title":"What is a Random Email?","content":"Random emails are virtual addresses generated by combining random usernames and domains following email protocols. They may not exist and are primarily used for testing or placeholders."},{"title":"Privacy Protection","content":"Using random emails on untrusted sites can prevent your primary email from being exposed to spammers."}],"featuresTitle":"Key Features","features":["Fully RFC compliant email formats","Supports custom domain injection","Instant results at high speed","Client-side generation for absolute privacy"]}},"random-guid":{"settings":{"title":"GUID Settings","format":"Format","formats":{"standard":"Standard (with dashes)","noDashes":"No Dashes","braces":"With Braces '{…}'","parentheses":"With Parentheses (…)"},"uppercase":"Uppercase","quantity":"Number of GUIDs","generate":"Generate"},"results":{"title":"Generated GUIDs","clear":"Clear","empty":"Click the button above to generate GUIDs"},"guide":{"title":"How to Use","steps":["Select the desired output format.","Toggle uppercase or lowercase.","Set the number of GUIDs to generate.","Click 'Generate' to create random UUIDs.","Click any GUID to copy it to clipboard."]},"knowledge":{"title":"About GUIDs","items":[{"title":"What is a GUID/UUID?","content":"A GUID (Globally Unique Identifier) or UUID (Universally Unique Identifier) is a 128-bit label used for uniquely identifying information. Version 4 UUIDs are generated randomly."},{"title":"UUID v4 Format","content":"The standard format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where x is a random hexadecimal digit and y is one of 8, 9, A, or B."},{"title":"Use Cases","content":"GUIDs are widely used as database primary keys, session identifiers, API tokens, distributed system IDs, and file naming in systems that require globally unique identifiers."}]}},"random-ip-address":{"settings":{"title":"IP Settings","version":"IP Version","versions":{"ipv4":"IPv4","ipv6":"IPv6"},"quantity":"Number of Addresses","generate":"Generate"},"results":{"title":"Generated IP Addresses","clear":"Clear","empty":"Click the button above to generate random IP addresses"},"guide":{"title":"How to Use","steps":["Select the IP version (IPv4 or IPv6).","Choose the number of addresses to generate.","Click 'Generate' to create random IP addresses.","Click any address to copy it to clipboard."]},"knowledge":{"title":"About IP Addresses","items":[{"title":"IPv4","content":"IPv4 addresses are 32-bit numbers, typically shown as four octets (e.g. 192.168.1.1). There are approximately 4.3 billion possible addresses."},{"title":"IPv6","content":"IPv6 addresses are 128-bit numbers, shown as eight groups of four hex digits (e.g. 2001:0db8:85a3::8a2e:0370:7334). The address space is vastly larger than IPv4."},{"title":"Testing Use","content":"Random IP addresses are commonly used for testing network configurations, firewalls, logging systems, and data anonymization."}]}},"random-list-picker":{"settings":{"title":"List Picker Settings","inputLabel":"Enter items (one per line)","inputPlaceholder":"Item 1\nItem 2\nItem 3...","pickCount":"Number of items to pick","allowDuplicates":"Allow duplicates","pick":"Pick Randomly"},"results":{"title":"Picked Items","clear":"Clear","empty":"Add items and click the button to pick"},"guide":{"title":"How to Use","steps":["Enter your list of items in the text area, one per line.","Specify how many items you want to pick from the list.","Choose whether you want to allow the same item to be picked multiple times.","Click 'Pick Randomly' to see the selected items."]},"knowledge":{"title":"About Random Picking","items":[{"title":"Fairness","content":"Random picking ensures every item in your list has an equal chance of being selected, which is essential for fair drawings and giveaways."},{"title":"With vs. Without Replacement","content":"'Allow duplicates' is known as picking with replacement. If disabled, once an item is picked, it cannot be picked again in the same session."}]}},"random-lottery-picker":{"settings":{"title":"Lottery Settings","lotteryType":"Lottery Type","types":{"ssq":"Double Color Ball (6+1)","dlt":"Super Lotto (5+2)","custom":"Custom"},"mainCount":"Main Numbers","mainRange":"Main Number Range","bonusCount":"Bonus Numbers","bonusRange":"Bonus Number Range","sets":"Number of Sets","generate":"Generate Numbers"},"results":{"title":"Generated Numbers","clear":"Clear","empty":"Click the button above to generate lottery numbers","setLabel":"Set {number}","main":"Main","bonus":"Bonus"},"guide":{"title":"How to Use","steps":["Select a lottery type or customize your own number format.","Choose how many sets of numbers to generate.","Click 'Generate Numbers' to get your lucky picks.","Each set guarantees no duplicate numbers within main and bonus pools."]},"knowledge":{"title":"About Lottery Numbers","items":[{"title":"Random Selection","content":"This tool uses cryptographically secure random number generation to ensure each number combination is equally likely."},{"title":"Double Color Ball","content":"China's most popular lottery. Select 6 red balls from 1-33 and 1 blue ball from 1-16."},{"title":"Super Lotto","content":"Select 5 front numbers from 1-35 and 2 back numbers from 1-12."},{"title":"Disclaimer","content":"This tool is for entertainment purposes only. Lottery numbers are random and past results do not predict future outcomes."}]}},"random-mac-address":{"settings":{"title":"MAC Settings","separator":"Separator","separators":{"colon":"Colon (:)","dash":"Dash (-)","none":"None"},"uppercase":"Uppercase","quantity":"Number of Addresses","generate":"Generate"},"results":{"title":"Generated MAC Addresses","clear":"Clear","empty":"Click the button above to generate random MAC addresses"},"guide":{"title":"How to Use","steps":["Choose the separator format (colon, dash, or none).","Toggle uppercase or lowercase output.","Set the number of addresses to generate.","Click 'Generate' to create random MAC addresses."]},"knowledge":{"title":"About MAC Addresses","items":[{"title":"MAC Address Format","content":"A MAC (Media Access Control) address is a 48-bit (6-byte) hardware identifier assigned to network interfaces. It is typically displayed as six pairs of hexadecimal digits."},{"title":"OUI","content":"The first three bytes of a MAC address represent the Organizationally Unique Identifier (OUI), which identifies the manufacturer. Randomly generated MACs do not correspond to real OUIs."},{"title":"Testing Use","content":"Random MAC addresses are useful for testing network applications, simulating devices, and data anonymization in network logs."}]}},"random-name":{"title":"Random Name Generator","description":"Generate random names for characters, users, or creative projects.","settings":{"title":"Name Settings","quantity":"Number of Names","gender":"Gender Preference","both":"Both","male":"Male","female":"Female","generate":"Generate"},"results":{"title":"Generated Names","copyAll":"Copy All","clear":"Clear","empty":"Click the button above to start generating"},"guide":{"title":"How to use","items":["Select the number of names you want to generate.","Choose a gender preference or select 'Both' for a mix.","Click 'Generate' to see the random names list.","Copy the names you like using the copy icon."]},"knowledge":{"title":"Random Names","items":[{"title":"Naming Diversity","content":"This generator uses a database of common first names and surnames to create realistic combinations."},{"title":"Privacy","content":"Using random names for testing or non-essential accounts can help protect your real identity online."}],"featuresTitle":"Key Features","features":["Realistic name combinations","Gender filtering support","Fast batch generation","Creative character naming","Simple copy functionality"]}},"random-number":{"title":"Random Number Generator","description":"Generate random numbers within a specified range (min/max).","settings":{"title":"Generator Settings","min":"Minimum Value","max":"Maximum Value","quantity":"Number of Results","unique":"Unique Results","generate":"Generate"},"results":{"title":"Generated Numbers","copyAll":"Copy All","clear":"Clear","empty":"Click the button above to start generating"},"guide":{"title":"How to use","items":["Set the minimum and maximum range for the random numbers.","Choose how many random numbers you want to generate.","Optionally enable 'Unique Results' to avoid duplicates.","Click 'Generate' to get your random numbers.","Use the copy button to copy individual results or 'Copy All' for the list."]},"knowledge":{"title":"About Random Numbers","items":[{"title":"True Random vs Pseudo-Random","content":"Most computer-generated random numbers are pseudo-random, meaning they are determined by an algorithm but appear random. This tool uses cryptographically secure random values (window.crypto) for higher quality randomness."},{"title":"Probability","content":"In a truly random sequence, every number within the range has an equal probability of being selected."}],"featuresTitle":"Key Features","features":["Support for large number ranges","Cryptographically secure randomness","Unique result option","Batch generation","Easy one-click copying"]}},"random-password":{"title":"Random Password Generator","description":"Create strong and secure passwords instantly to protect your online accounts.","settings":{"title":"Password Settings","length":"Password Length","quantity":"Number of Passwords","uppercase":"Uppercase (A-Z)","lowercase":"Lowercase (a-z)","numbers":"Numbers (0-9)","symbols":"Symbols (!@#$)","excludeSimilar":"Exclude Similar (i, l, 1, L, o, 0, O)","generate":"Generate"},"results":{"title":"Generated Passwords","copyAll":"Copy All","clear":"Clear","empty":"Click the button above to start generating","strength":"Strength (Sample)"},"guide":{"title":"How to use","items":["Adjust the slider to choose your desired password length (recommend 16+).","Select how many passwords you want to generate at once.","Check the boxes to include different character types for better security.","Use 'Exclude Similar' to avoid confusing characters like 'l' and '1'.","Click 'Generate' and use the copy buttons to save your new passwords."]},"knowledge":{"title":"Password Security Ideas","items":[{"title":"What makes a password strong?","content":"A strong password is long (12+ characters), uses a mix of types (uppercase, lowercase, numbers, symbols), and is not based on personal information or common dictionary words."},{"title":"Password Managers","content":"Instead of remembering all your strong passwords, use a password manager to store them securely. You only need to remember one master password."}],"featuresTitle":"Key Features","features":["Secure browser-side generation","Adjustable length up to 64 characters","Visual strength indicator","Bulk generation","No data sent to server"]}},"random-phone":{"title":"Random Phone Generator","description":"Generate random phone numbers formatted for different countries, perfect for form testing and development.","settings":{"title":"Settings","quantity":"Quantity","locale":"Select Locale","locales":{"zh_CN":"China","en_US":"USA","en_GB":"UK","es_ES":"Spain","fr_FR":"France","de_DE":"Germany","ja_JP":"Japan"},"type":"Phone Type","types":{"all":"All","mobile":"Mobile","fixed":"Landline"},"generate":"Generate Now","copyAll":"Copy All"},"results":{"title":"Results","empty":"Click the button above to start generating","clear":"Clear"},"guide":{"title":"How to Use","items":["Select the number of phone numbers you need to generate.","Choose a target country/region from the dropdown to ensure correct formatting.","Choose the phone type (Mobile or Landline).","Click 'Generate Now' to get the list of localized numbers.","Copy individual numbers or use 'Copy All' for the entire list."]},"knowledge":{"title":"About Random Phone Numbers","items":[{"title":"Validity Note","content":"Generated numbers follow standard formatting logic (prefixes, length, dividers) but are not necessarily active or dialable. Use for testing purposes only."},{"title":"Use Cases","content":"Ideal for developers validating form inputs and ensuring UI layouts handle various international phone formats correctly."}],"featuresTitle":"Key Features","features":["Supports major country/region formats","Simulates country-specific prefix rules","Includes various formatting styles (dashes, parentheses, etc.)","Blazing fast local generation"]}},"random-string":{"title":"Random String Generator","description":"Generate random strings with custom length and character sets.","settings":{"title":"Generator Settings","length":"String Length","quantity":"Number of Results","include":"Included Characters","uppercase":"ABC (Uppercase)","lowercase":"abc (Lowercase)","numbers":"123 (Numbers)","symbols":"!@# (Symbols)","custom":"Custom Characters","generate":"Generate"},"results":{"title":"Generated Strings","copyAll":"Copy All","clear":"Clear","empty":"Click the button above to start generating"},"guide":{"title":"How to use","items":["Choose the length for each random string.","Select the number of strings to generate.","Toggle the character sets you want to include (Letters, Numbers, Symbols).","You can also add a custom set of characters to the generator.","Click 'Generate' to see the results."]},"knowledge":{"title":"String Randomization","items":[{"title":"Character Entropy","content":"Entropy is a measure of randomness. Using more character types (mixed case, numbers, symbols) increases the entropy and makes the string harder to guess."},{"title":"Use Cases","content":"Random strings are commonly used for unique identifiers, temporary filenames, or testing data in software development."}],"featuresTitle":"Key Features","features":["Customizable string length","Multiple character set selection","Custom character support","Bulk generation","Instant results preview"]}},"random-team-generator":{"settings":{"title":"Team Generator Settings","inputLabel":"Enter names (one per line)","inputPlaceholder":"Participant 1\nParticipant 2\nParticipant 3...","mode":"Generation Mode","modeTeams":"Number of Teams","modeMembers":"Members per Team","count":"Value","generate":"Generate Teams"},"results":{"title":"Generated Teams","clear":"Clear","empty":"Add participants and click the button to generate teams","teamLabel":"Team {number}"},"guide":{"title":"How to Use","steps":["Enter the names of all participants, one per line.","Choose between generating a specific number of teams or a specific number of members per team.","Enter the desired value for your chosen mode.","Click 'Generate Teams' to see the random groups."]},"knowledge":{"title":"About Team Generation","items":[{"title":"Random Balancing","content":"The tool shuffles the list of names randomly before assigning them to teams to ensure variety and fairness."},{"title":"Uneven Groups","content":"If the number of participants doesn't divide evenly, the remaining members will be distributed among the teams."}]}},"random-wheel-spinner":{"settings":{"title":"Wheel Settings","inputLabel":"Options (one per line)","inputPlaceholder":"Pizza\nBurger\nSushi\nTacos\nSalad","spin":"Spin the Wheel","spinning":"Spinning..."},"results":{"title":"Result","clear":"Clear","empty":"Add options and spin the wheel to get a result","winner":"Winner","spinAgain":"Spin Again"},"guide":{"title":"How to Use","steps":["Enter your options in the text area, one per line.","Click 'Spin the Wheel' to start the animation.","The wheel will slow down and land on a random option.","Previous results are shown in the history below."]},"knowledge":{"title":"About the Wheel Spinner","items":[{"title":"Fair Selection","content":"Each option has an equal probability of being selected. The visual animation is purely aesthetic — the result is determined by a cryptographically secure random number."},{"title":"Use Cases","content":"Perfect for deciding where to eat, picking a winner in a contest, choosing activities, or making any group decision fun."},{"title":"Customizable","content":"You can add as many options as you like. The wheel automatically adjusts to accommodate all entries."}]}},"random-yes-no":{"settings":{"title":"Decision Settings","questionLabel":"Optional: Enter your question","questionPlaceholder":"Should I go out today?","includeMaybe":"Include 'Maybe'","decide":"Ask Question"},"results":{"title":"The Answer Is...","clear":"Clear History","empty":"Click the button to get an answer","yes":"YES","no":"NO","maybe":"MAYBE"},"guide":{"title":"How to Use","steps":["Enter an optional question to help you focus on the decision.","Choose whether you want to include 'Maybe' as a possible outcome.","Click 'Ask Question' to receive a randomized answer.","The history of your decisions will be tracked in the results area."]},"knowledge":{"title":"About Yes/No Decisions","items":[{"title":"Overcoming Indecision","content":"Sometimes we get stuck in 'analysis paralysis'. A simple random answer can help break the cycle and force us to confront our gut feeling about an option."},{"title":"The Coin Toss Method","content":"A common trick is to flip a coin, and while it's in the air, you often realize which side you're actually rooting for."}]}},"ratioCalculator":{"title":"Ratio Calculator","description":"Solve ratio problems, simplify ratios, and resize images or screens while maintaining aspect ratio.","keywords":"ratio calculator, ratio solver, aspect ratio, simplify ratio","category":"Math","a":"A","b":"B","c":"C","d":"D","calculate":"Calculate","result":"Result","clear":"Clear","solveFor":"Solve for","guide":{"title":"How to use","items":["Enter any three values in the ratio equation A : B = C : D.","The tool will calculate the missing fourth value.","Alternatively, enter A and B to simplify the ratio."]},"knowledge":{"title":"About Ratios","introduction":"A ratio indicates how many times one number contains another.","items":[{"title":"Representation","content":"Ratios are often written as A:B or A/B."}],"featuresTitle":"Features","features":["Solve for missing value","Simplify ratios","Aspect ratio calculation"],"applicationsTitle":"Applications","applications":["Screen resolutions","Cooking recipes scaling","Financial analysis"]}},"rc4":{"title":"RC4 Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"1-256 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"RC4 Knowledge","sections":[]}},"rectangleCalculator":{"title":"Rectangle Calculator","description":"Calculate area, perimeter, and diagonal of a rectangle.","keywords":"rectangle calculator, area of rectangle, perimeter calculator, diagonal calculator","category":"Math","length":"Length (l)","width":"Width (w)","calculate":"Calculate","result":"Results","area":"Area","perimeter":"Perimeter","diagonal":"Diagonal","clear":"Clear","guide":{"title":"How to Use","items":["Enter the length and width.","Click 'Calculate'.","Area, Perimeter, and Diagonal will be displayed."]},"knowledge":{"title":"About Rectangles","introduction":"A rectangle is a quadrilateral with four right angles.","items":[{"title":"Formulas","content":"Area = length * width\nPerimeter = 2 * (length + width)\nDiagonal = √(length^2 + width^2)"}],"featuresTitle":"Features","features":["Calculate basic properties","Diagonal calculation using Pythagorean theorem"],"applicationsTitle":"Applications","applications":["Land measurement","Construction","Interior design"]}},"redirectChecker":{"title":"Redirect Checker","description":"Analyze the URL redirect chain and status codes (301, 302) to troubleshoot links.","inputLabel":"URL","inputPlaceholder":"https://example.com","buttonLabel":"Check Redirects","resultLabel":"Redirect Chain","errorLabel":"Error","statusCode":"Status Code","location":"Location","redirectLoop":"Redirect Loop Detected","tooManyRedirects":"Too Many Redirects"},"reverseDns":{"title":"Reverse DNS Lookup","description":"Perform a reverse DNS lookup to find the hostname associated with an IP address.","input":{"label":"IP Address","placeholder":"e.g., 8.8.8.8","button":"Lookup"},"result":{"title":"Hostname","error":"Error"},"guide":{"title":"How to use Reverse DNS","items":["Enter a valid IPv4 or IPv6 address.","Click 'Lookup' to query the DNS system.","View the hostname(s) associated with the IP address."]},"knowledge":{"title":"About Reverse DNS","items":[{"title":"What is Reverse DNS?","content":"Reverse DNS (rDNS) resolves an IP address to a domain name, unlike standard DNS which resolves domain names to IP addresses."},{"title":"PTR Records","content":"Reverse DNS lookups use Pointer (PTR) records stored in the DNS system."},{"title":"Use Cases","content":"Commonly used for network troubleshooting, spam filtering, and verifying the identity of email servers."}]}},"robotsTxtGenerator":{"title":"Robots.txt Generator","description":"Create a robots.txt file to control how search engines crawl your site.","configuration":"Configuration","defaultRules":"Default Rules (*)","userAgent":"User Agent","allow":"Allow Path","disallow":"Disallow Path","addAllow":"Add Allow Rule","addDisallow":"Add Disallow Rule","crawlDelay":"Crawl Delay (seconds)","sitemaps":"Sitemaps","addSitemap":"Add Sitemap URL","result":"Result","copy":"Copy","copied":"Copied to clipboard"},"romanNumerals":{"seoTitle":"Roman Numerals Converter | Convert Numbers to Roman - TE Cyber","seoDescription":"Free online Roman numerals converter. Quickly translate between Arabic numbers (decimals) and Roman numerals.","title":"Roman Numerals Converter","description":"Convert numbers to Roman numerals or Roman numerals to regular decimal numbers.","numberInput":"Decimal Number (e.g., 2024)","romanInput":"Roman Numeral (e.g., MMXXIV)","toRoman":"Convert to Roman Numeral","toNumber":"Convert to Number","clear":"Clear","result":"Conversion Result","invalidNumber":"Please enter a valid number between 1 and 3999.","invalidRoman":"Please enter a valid Roman numeral.","guide":{"title":"How to Use","items":["To find a Roman Numeral: Enter a regular number (1-3999) and click 'Convert to Roman Numeral'.","To find a regular number: Enter a Roman Numeral (e.g., XIV) and click 'Convert to Number'."]},"knowledge":{"title":"About Roman Numerals","introduction":"The numeric system represented by Roman numerals originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages.","items":[{"title":"Basic Symbols","content":"Numbers are written with combinations of letters from the Latin alphabet: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000)."},{"title":"Subtractive Notation","content":"To avoid four characters being repeated in succession, subtractive notation is used. E.g., IV is 4 (5-1), rather than IIII. IX is 9 (10-1)."}],"featuresTitle":"Key Rules","features":["No symbol is repeated more than three times consecutively.","V, L, and D are never repeated.","Only I, X, and C can be used for subtraction."],"applicationsTitle":"Modern Applications","applications":["Clocks and watch faces.","Book chapter numbers and appendices.","Movie sequels and Super Bowl editions.","Monarchs and Popes (e.g., Queen Elizabeth II)."]}},"rsa-key-generator":{"title":"RSA Key Pair Generator","config":{"title":"RSA Configuration","keySize":"Key Size (Bits)","format":"Key Format","passphrase":"Optionally Protect with Passphrase","generateBtn":"Generate Key Pair","formats":{"pkcs1":"PKCS#1 (Traditional RSA)","pkcs8":"PKCS#8 (Modern Standard)","jwk":"JSON Web Key (JWK)"}},"results":{"title":"Keys generated successfully","publicKey":"Public Key","privateKey":"Private Key","downloadPub":"Download Public Key","downloadPriv":"Download Private Key"}},"rsa":{"title":"RSA Encryption/Decryption","keyPair":{"title":"Key Pair Management","generate":"Generate Key Pair","keySize":"Key Size","format":"Key Format","publicKey":"Public Key","privateKey":"Private Key","error":"Error generating key pair","publicKeyPlaceholder":"Paste public key here...","privateKeyPlaceholder":"Paste private key here...","bits":{"512":"512 bits (Insecure)","1024":"1024 bits (Not Recommended)","2048":"2048 bits (Recommended)","4096":"4096 bits (High Security)"},"formats":{"pem":"PEM","hex":"HEX"},"clearKey":"Clear Keys"},"crypto":{"title":"RSA Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter text to encrypt...","hex":"Enter hexadecimal data..."},"cipherPlaceholder":"Encrypted result will be displayed here...","encryptButton":"Encrypt","decryptButton":"Decrypt","error":"Operation failed: Please check your input and keys","formatError":"Format conversion failed","paddingMode":"Padding Mode","noInput":"Please enter data","invalidKey":"Invalid key format","noPrivateKey":"Please enter private key first","invalidHex":"Invalid hexadecimal format","invalidBase64":"Invalid Base64 format","invalidInput":"Invalid input data format","invalidPrivateKey":"Invalid private key format","outputError":"Failed to decode result"},"signature":{"title":"RSA Signature/Verification","plainFormat":"Original Format","sigFormat":"Signature Format","plainPlaceholder":{"utf8":"Enter text to sign...","hex":"Enter hexadecimal data..."},"sigPlaceholder":"Signature will be displayed here...","sigVerifyPlaceholder":"Enter signature to verify...","signButton":"Sign","verifyButton":"Verify","hashAlgo":"Hash Algorithm","verifySuccess":"Signature verified successfully","verifyFailed":"Signature verification failed: mismatch or tampered data","error":"Operation failed: Please check your input and keys"},"format":{"utf8":"UTF-8","hex":"HEX"},"guide":{"title":"Usage Guide","items":["1. First generate or import an RSA key pair","2. Use public key for encryption, private key for decryption","3. Ensure the same padding mode is used for encryption and decryption","4. OAEP padding mode is recommended for better security","5. Keep your private key safe and never share it"]},"padding":{"title":"Padding Scheme","label":"Select padding scheme:","pkcs1":"PKCS#1 v1.5","oaep":"OAEP","pss":"PSS","none":"No Padding","pkcs1Info":"Most commonly used padding mode, suitable for most scenarios","oaepInfo":"More secure padding mode, recommended for new systems","pssInfo":"Padding mode typically used for digital signatures","noneInfo":"No padding mode for special cases only. After decryption, manually remove leading null characters (\\x00) to get the original text."},"tips":{"title":"RSA Algorithm Information","knowledge":{"title":"RSA Encryption Knowledge","items":[{"title":"What is RSA?","content":"RSA is an asymmetric encryption algorithm using a key pair: public key for encryption and private key for decryption. Its security is based on the difficulty of factoring large numbers."},{"title":"How it Works","content":"Generates key pairs using the product of two large prime numbers, utilizing number theory concepts like Euler's function and modular arithmetic for encryption and decryption."},{"title":"Key Length","content":"Key length directly affects security. Currently,2048-bit or longer keys are recommended for adequate security."},{"title":"Padding Schemes","content":"Uses padding schemes (like OAEP) to enhance security and prevent various known attacks."},{"title":"Public Key Encryption, Private Key Decryption","content":"This is the most fundamental use of RSA. The sender encrypts data with the receiver's public key, and only the receiver holding the corresponding private key can decrypt it. This ensures confidentiality."},{"title":"Private Key Signing, Public Key Verification","content":"The sender signs data with their own private key, and anyone with the public key can verify the signature's authenticity. This ensures sender reliability and data integrity."},{"title":"Fully Localized Processing","content":"For your data and privacy security, all calculations (including key generation, encryption, decryption, signing, and verification) are performed locally in your browser. No data is sent to the server."}],"featuresTitle":"RSA Features","features":["Asymmetric Encryption: Uses different keys for encryption and decryption","High Security: Based on mathematical problems, difficult to crack","Simple Key Management: Public key can be freely distributed","Digital Signatures: Can be used for authentication and integrity verification"],"applicationsTitle":"Applications","applications":["Secure Communications: Protecting sensitive data transmission","Digital Certificates: Authentication in SSL/TLS protocols","Electronic Signatures: Ensuring document authenticity and integrity","Key Exchange: Securely transmitting symmetric encryption keys","Secure Email: Email encryption and authentication"],"securityTitle":"Security Recommendations","security":["Use sufficiently long keys (minimum 2048 bits)","Choose secure padding schemes (OAEP recommended)","Safeguard private keys against exposure","Regularly update key pairs","Use in conjunction with other security measures"]}}},"scrypt-generator":{"title":"Scrypt Hash Generator","config":{"title":"Scrypt Parameters","password":"Password","salt":"Salt","n":"Cost Factor (N)","r":"Block Size (r)","p":"Parallelization (p)","hashLength":"Output Hash Length (Bytes)","generateBtn":"Generate Scrypt Hash"},"results":{"title":"Scrypt Result","hex":"Derived Key (Hex)"}},"search":{"placeholder":"Search tools..."},"seo-canonicalTag":{"title":"Canonical Tag Generator","description":"Generate canonical link tags and HTTP headers to prevent duplicate content","urlsLabel":"URLs (one per line)","urlsPlaceholder":"https://example.com/page\nhttps://example.com/page?ref=social\nhttps://example.com/page?source=email","canonicalUrlLabel":"Canonical URL (target URL)","canonicalUrlPlaceholder":"https://example.com/page","generateButton":"Generate","copyHtmlButton":"Copy HTML","copyHeaderButton":"Copy HTTP Header","copiedButton":"Copied!","htmlOutputLabel":"HTML Tags","headerOutputLabel":"HTTP Link Headers","batchMode":"Batch Mode (each URL is its own canonical)","guide":{"title":"How to Use","items":["For a single canonical: enter the page URLs in the first field and the canonical target URL in the second field.","For batch mode: toggle 'Batch Mode' and enter multiple URLs — each will generate a self-referencing canonical tag.","Click 'Generate' to create both the HTML tags and HTTP Link header format.","Paste the HTML tags inside the section of your page, or configure the HTTP header on your server.","Use the HTTP Link header format for pages that can't have HTML modified, like PDF files served via HTTP."]},"knowledge":{"title":"About Canonical Tags","items":[{"title":"What is a Canonical Tag?","content":"A canonical tag () tells search engines which version of a URL is the 'master' or preferred version when multiple URLs with similar or identical content exist. For example, https://example.com/page, https://example.com/page?ref=twitter, and https://www.example.com/page are technically different URLs but may show the same content. The canonical tag signals to search engines which version should be indexed and receive link equity."},{"title":"When to Use Canonical Tags","content":"Use canonical tags in these common scenarios: URL parameters creating duplicate content (session IDs, tracking parameters like ?utm_source=), www vs non-www versions, HTTP vs HTTPS versions, trailing slash vs no trailing slash, product pages accessible from multiple category paths, and printer-friendly page versions. Self-referencing canonical tags (a page pointing to itself) are also recommended as a best practice for all pages."},{"title":"Canonical vs 301 Redirect","content":"Both canonical tags and 301 redirects help consolidate duplicate content, but they serve different purposes. A 301 redirect permanently forwards users and search engines to the target URL — the old URL stops working. A canonical tag allows both URLs to remain accessible while signaling the preferred version for indexing. Use 301 redirects when you want to permanently decommission a URL; use canonical tags when you need to keep multiple URL versions accessible."},{"title":"HTTP Link Headers for Canonical","content":"For non-HTML resources like PDFs or documents served via HTTP, you can't add HTML canonical tags inside the file. Instead, use an HTTP Link header: Link: ; rel='canonical'. This achieves the same result as the HTML canonical tag and is fully supported by Google. Configure this via your web server (Apache, Nginx) or CDN settings. This is especially important for canonicalizing document content."}],"featuresTitle":"Key Features","features":["Generates standard HTML tags","Also generates HTTP Link header format for non-HTML resources","Batch mode for generating self-referencing canonicals for multiple URLs","Supports both single canonical target and one-to-one URL mapping"],"applicationsTitle":"Common Applications","applications":["Consolidating duplicate product pages created by URL parameter variations","Setting canonical URLs for paginated content (page 2, 3, etc.) to the first page","Resolving www vs non-www and HTTP vs HTTPS duplicate content issues","Adding self-referencing canonicals to all pages as a preventive SEO measure"]}},"seo-descriptionGenerator":{"title":"Meta Description Generator","description":"Generate compelling meta description suggestions with optimal character counts","topic":"Page Topic / Subject","topicPlaceholder":"e.g., keyword density analysis tool","keywords":"Target Keywords","keywordsPlaceholder":"e.g., keyword density, SEO analysis, content optimization","audience":"Target Audience","audiencePlaceholder":"e.g., SEO professionals, bloggers, content marketers","cta":"Call to Action","ctaPlaceholder":"e.g., Try it free, Get started, Learn more","generateButton":"Generate Descriptions","clearButton":"Clear","resultsTitle":"Description Suggestions","charCount":"chars","copyTip":"Click to copy","optimal":"Optimal","tooShort":"Too short","tooLong":"Too long","noResults":"Fill in the fields and click Generate Descriptions.","guide":{"title":"How to Use","items":["Describe the page topic clearly — be specific about what the page covers.","List your target keywords (comma-separated) to ensure they appear in the descriptions.","Define your target audience to tailor the tone and messaging of the descriptions.","Add a call to action (optional) — CTAs like 'Try free', 'Learn more', 'Get started' can improve CTR.","Click 'Generate Descriptions' to get multiple 150-160 character suggestions, then click any to copy."]},"knowledge":{"title":"About Meta Descriptions","items":[{"title":"Why Meta Descriptions Matter","content":"While meta descriptions are not a direct ranking factor for Google, they appear as the 'snippet' below the title in search results and have a major impact on click-through rates. A well-written description that accurately reflects page content and includes a compelling call to action can significantly increase the percentage of searchers who click your result. Higher CTR improves user engagement signals, which can indirectly influence rankings."},{"title":"Optimal Length and Truncation","content":"Google typically displays 150-160 characters for desktop and fewer for mobile. Descriptions longer than 160 characters get truncated with '...' at the end. Keep the most important information and CTA within the first 150 characters to ensure it's never cut off. Descriptions shorter than 100 characters may appear thin and miss opportunities to attract clicks. Aim for 150-160 characters as the sweet spot."},{"title":"Keyword Inclusion Strategy","content":"Including your target keyword in the meta description has a dual benefit: it helps confirm to searchers that your page is relevant to their query, and Google often bolds matching keywords in the snippet, making your result stand out visually. Use the keyword naturally rather than awkwardly forcing it in. Avoid keyword stuffing in descriptions — it looks spammy and reduces trust with searchers."},{"title":"Google Overriding Your Description","content":"Google will override your custom meta description and use a different snippet from the page if it believes another portion of the page better matches the user's search intent. This happens in approximately 62-63% of searches. To minimize overrides: ensure your description accurately summarizes the page content, match the search intent of your target keywords, and avoid generic descriptions that could apply to any page."}],"featuresTitle":"Key Features","features":["Generates multiple description variations tailored to your topic and audience","Character counter with optimal range indicators (150-160 chars)","Integrates target keywords naturally into each description","Includes effective call-to-action phrases to improve click-through rates"],"applicationsTitle":"Common Applications","applications":["Writing meta descriptions for new pages that maximize click-through rates","Refreshing underperforming page descriptions to improve organic CTR","Creating consistent description templates for large content sites","Testing different description styles for their impact on click-through rates"]}},"seo-hreflangGenerator":{"title":"Hreflang Tag Generator","description":"Generate hreflang link tags for multilingual and multi-regional websites","addLanguage":"Add Language Version","languageLabel":"Language / Region","urlLabel":"URL for this Language","urlPlaceholder":"https://example.com/en/page","includeXDefault":"Include x-default","xDefaultUrl":"x-default URL","xDefaultPlaceholder":"https://example.com/page (default language URL)","removeRow":"Remove","generateButton":"Generate Hreflang Tags","copyHtmlButton":"Copy HTML Tags","copySitemapButton":"Copy Sitemap XML","copiedButton":"Copied!","htmlOutputLabel":"HTML Tags","sitemapOutputLabel":"XML Sitemap Format","languages":{"en":"English","en-US":"English (US)","en-GB":"English (UK)","zh":"Chinese","zh-CN":"Chinese (Simplified)","zh-TW":"Chinese (Traditional)","es":"Spanish","es-ES":"Spanish (Spain)","es-MX":"Spanish (Mexico)","fr":"French","fr-FR":"French (France)","de":"German","ja":"Japanese","ko":"Korean","pt":"Portuguese","pt-BR":"Portuguese (Brazil)","ru":"Russian","ar":"Arabic","it":"Italian","nl":"Dutch"},"guide":{"title":"How to Use","items":["Click 'Add Language Version' to add each language/region URL pair.","Select the language/region code from the dropdown (e.g., 'en-US' for English US).","Enter the full URL for that language version (must be the absolute URL with https://).","Toggle 'Include x-default' to specify the default fallback URL shown to users whose language is not explicitly supported.","Click 'Generate' to create both HTML tags and XML sitemap format — add the HTML tags to the of every language version."]},"knowledge":{"title":"About Hreflang Tags","items":[{"title":"What is Hreflang?","content":"Hreflang is an HTML attribute (and XML sitemap element) that tells Google which language version of a page to serve to users in different locations. It was introduced by Google in 2011 to solve the problem of international SEO — helping Google understand that multiple versions of a page exist for different languages or regions. Without hreflang, Google may show the wrong language version to international users, hurting engagement."},{"title":"Hreflang Tag Requirements","content":"For hreflang to work correctly: every language version must link to all other versions (including itself), the URLs must be absolute (full URL with https://), the hreflang values must use valid ISO 639-1 language codes (e.g., 'en', 'fr') optionally combined with ISO 3166-1 Alpha-2 country codes (e.g., 'en-US', 'fr-FR'), and the x-default tag should point to the page shown when no language-specific version matches the user's language."},{"title":"x-default Attribute","content":"The x-default hreflang value () designates the fallback page shown to users whose language or region does not match any of the explicitly listed language variants. This is typically your homepage or a language selector page. It's optional but strongly recommended as a best practice. Google uses x-default to handle users from regions not explicitly covered by your hreflang annotations."},{"title":"Hreflang in XML Sitemaps","content":"As an alternative to HTML link tags (which must appear on every page), you can include all hreflang annotations in your XML sitemap using the xhtml:link namespace. This is especially useful for large sites where adding HTML tags to every page is impractical. The sitemap must include all language alternatives for each URL. Both methods (HTML and sitemap) are equally valid and recognized by Google — choose based on your site's architecture."}],"featuresTitle":"Key Features","features":["Supports 20+ language and region code combinations","Generates both HTML tags and XML sitemap format","Includes x-default support for fallback language handling","Validates that all required hreflang elements are present"],"applicationsTitle":"Common Applications","applications":["Setting up international SEO for multilingual websites targeting multiple countries","Differentiating between regional content variations (US vs UK English, Brazil vs Spain Spanish)","Fixing Google Search Console errors related to hreflang implementation","Generating sitemap entries for large multilingual sites"]}},"seo-keywordDensity":{"title":"Keyword Density Analyzer","description":"Analyze keyword frequency and density percentage in your content","inputLabel":"Paste Your Text","inputPlaceholder":"Paste your article or web page content here...","minLengthLabel":"Minimum Word Length","ignoreStopwordsLabel":"Ignore Common Words (stopwords)","analyzeButton":"Analyze","clearButton":"Clear","resultsTitle":"Top Keywords","rank":"Rank","word":"Keyword","count":"Count","density":"Density","totalWords":"Total Words","uniqueWords":"Unique Words","noResults":"No results. Please paste some text and click Analyze.","guide":{"title":"How to Use","items":["Paste your article or web page content into the text area above.","Set the minimum word length filter (default: 3 characters) to exclude short words.","Toggle 'Ignore Common Words' to filter out stopwords like 'the', 'and', 'is'.","Click 'Analyze' to see the top 20 keywords with their frequency counts and density percentages.","Use the results to optimize your content — ideal keyword density is typically 1-3% for primary keywords."]},"knowledge":{"title":"About Keyword Density","items":[{"title":"What is Keyword Density?","content":"Keyword density is the percentage of times a keyword appears on a web page compared to the total number of words. It is calculated as: (Number of keyword occurrences / Total word count) × 100. Search engines use keyword density as one of many signals to understand what a page is about, though modern algorithms rely more on context and semantic relevance."},{"title":"Optimal Keyword Density","content":"There is no universally agreed-upon perfect keyword density. Most SEO experts recommend keeping primary keyword density between 1% and 3% for natural-sounding content. Too low density may mean your page doesn't signal relevance clearly; too high density (keyword stuffing) can result in search engine penalties and a poor user experience."},{"title":"Keyword Stuffing Risks","content":"Keyword stuffing is the practice of overloading a webpage with keywords in an attempt to manipulate search engine rankings. Google's algorithms penalize this practice through filters like Panda. Signs of keyword stuffing include unnatural repetition, text blocks that don't make sense for humans, and keywords appearing in meta tags far more than necessary."},{"title":"Using Stopwords","content":"Stopwords are common words like 'the', 'and', 'is', 'in', 'at', 'of' that appear frequently but carry little SEO value. Filtering these out gives you a clearer picture of the meaningful keywords in your content. Most keyword analysis tools offer stopword filtering, and enabling it helps you focus on the terms that actually drive search relevance and user intent."}],"featuresTitle":"Key Features","features":["Analyzes full text and displays top 20 keywords by frequency","Shows occurrence count and density percentage for each keyword","Configurable minimum word length filter to exclude short words","Optional stopword filtering for more meaningful keyword analysis"],"applicationsTitle":"Common Applications","applications":["Auditing existing content for keyword optimization","Comparing your content keyword distribution against competitors","Ensuring target keywords appear with appropriate frequency","Identifying unintentional keyword repetition before publishing"]}},"seo-metaTagsAnalyzer":{"title":"Meta Tags Analyzer","description":"Parse HTML source code to analyze all meta tags and get optimization suggestions","inputLabel":"Paste HTML Source Code","inputPlaceholder":"Paste the full HTML source code of your page here...","analyzeButton":"Analyze","clearButton":"Clear","resultsTitle":"Meta Tags Found","suggestionsTitle":"Optimization Suggestions","tagName":"Tag","tagValue":"Value","tagLength":"Length","noResults":"No results. Paste HTML source code and click Analyze.","noSuggestions":"No suggestions — all detected meta tags look good!","sections":{"basic":"Basic Tags","openGraph":"Open Graph Tags","twitter":"Twitter Card Tags","other":"Other Meta Tags"},"guide":{"title":"How to Use","items":["Open your web page in a browser, right-click, and select 'View Page Source'.","Copy the entire HTML source code (Ctrl+A, Ctrl+C).","Paste the HTML into the text area above.","Click 'Analyze' to extract and display all meta tags in a structured table.","Review the optimization suggestions to improve your page's SEO and social media sharing."]},"knowledge":{"title":"About Meta Tags","items":[{"title":"The title Tag","content":"The tag defines the title displayed in browser tabs and search engine results. It is one of the most important on-page SEO elements. Best practice: keep it between 50-60 characters, include your primary keyword near the beginning, and make it unique and descriptive for each page. Titles that are too long get truncated in search results."},{"title":"Meta Description","content":"The meta description provides a brief summary of the page content and appears below the title in search results (SERP snippets). While not a direct ranking factor, a compelling description improves click-through rates. Aim for 150-160 characters. Include your primary keyword naturally and end with a call to action when appropriate."},{"title":"Open Graph Tags","content":"Open Graph meta tags (og:title, og:description, og:image, og:url) control how your page is displayed when shared on social media platforms like Facebook, LinkedIn, and Slack. Without these tags, social platforms use arbitrary content from the page. The og:image should be at least 1200×630 pixels for best results across all platforms."},{"title":"Twitter Card Tags","content":"Twitter Card meta tags (twitter:card, twitter:title, twitter:description, twitter:image) control tweet previews when your URL is shared on Twitter. The 'summary_large_image' card type provides a large image preview that attracts more engagement. Without Twitter Card tags, Twitter falls back to Open Graph tags, but dedicated Twitter tags give you more control."}],"featuresTitle":"Key Features","features":["Parses and categorizes all meta tags: basic, Open Graph, Twitter, and others","Checks title and description length against SEO best practices","Detects missing critical tags like og:image or twitter:card","Provides actionable optimization suggestions for each issue found"],"applicationsTitle":"Common Applications","applications":["Auditing a page's meta tags before and after optimization","Verifying Open Graph tags are correctly implemented for social sharing","Checking competitor pages to understand their meta tag strategy","Troubleshooting why a page looks wrong when shared on social media"]}},"seo-metaTagsGenerator":{"title":"Meta Tags Generator","description":"Generate complete HTML meta tags code for your web page","pageTitle":"Page Title","pageTitlePlaceholder":"Enter your page title (50-60 chars recommended)","description_field":"Meta Description","descriptionPlaceholder":"Enter your meta description (150-160 chars recommended)","keywords":"Keywords","keywordsPlaceholder":"keyword1, keyword2, keyword3","author":"Author","authorPlaceholder":"Author name or company name","robots":"Robots","viewport":"Viewport","charset":"Charset","generateButton":"Generate Meta Tags","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","charCount":"chars","guide":{"title":"How to Use","items":["Fill in the Page Title field with your page's title (50-60 characters is optimal).","Write a compelling meta description (150-160 characters) that summarizes your page content.","Add relevant keywords separated by commas (optional — modern SEO relies less on meta keywords).","Set the robots directive: 'index, follow' allows search engines to index and follow links.","Click 'Generate Meta Tags' to create the HTML code, then copy and paste it into your page's <head> section."]},"knowledge":{"title":"About Meta Tags Generation","items":[{"title":"Viewport Meta Tag","content":"The viewport meta tag (<meta name='viewport' content='width=device-width, initial-scale=1'>) is essential for mobile-friendly pages. It tells browsers how to control the page's dimensions and scaling. Without it, mobile browsers render the page at a desktop width and then scale it down, resulting in a poor mobile experience and lower rankings in mobile search."},{"title":"Robots Meta Tag","content":"The robots meta tag controls how search engines crawl and index your page. Common values include: 'index, follow' (default — allows indexing and following links), 'noindex, follow' (don't index this page but follow links), 'noindex, nofollow' (block everything — for private pages), and 'noarchive' (don't show cached version in search results)."},{"title":"Charset Declaration","content":"The charset meta tag (<meta charset='UTF-8'>) declares the character encoding for the HTML document. UTF-8 is the universal encoding that supports virtually all characters from all languages and is the recommended charset for all modern websites. It should be the first tag in the <head> section so browsers interpret the document correctly from the start."},{"title":"Meta Keywords Tag","content":"The meta keywords tag was historically used to tell search engines what keywords the page is about. However, Google stopped using it as a ranking signal in 2009 because of widespread abuse (keyword stuffing). Most modern SEO strategies focus on title, description, and actual page content instead. Including meta keywords is harmless but provides no ranking benefit in Google."}],"featuresTitle":"Key Features","features":["Generates all essential meta tags: charset, viewport, title, description, keywords, author, robots","Character counter for title and description to ensure optimal length","One-click copy for the generated HTML code","Configurable robots and viewport options"],"applicationsTitle":"Common Applications","applications":["Setting up meta tags for a new web page from scratch","Standardizing meta tags across multiple pages of a website","Learning which meta tags are needed for a modern, SEO-friendly page","Quickly generating meta tag templates for CMS or framework integration"]}},"seo-mobileFriendly":{"title":"Mobile Friendly Checker","description":"Check HTML code for mobile-friendliness and get optimization recommendations","inputLabel":"Paste HTML Code","inputPlaceholder":"Paste your page's HTML source code here...","checkButton":"Check Mobile Friendliness","clearButton":"Clear","resultsTitle":"Mobile Friendliness Results","scoreLabel":"Mobile Score","checkItems":{"viewport":"Viewport Meta Tag","fontSizes":"Font Sizes","tapTargets":"Tap Target Sizes","flash":"No Flash/Plugins","mediaQueries":"Responsive Media Queries","textSize":"Readable Text Size"},"status":{"pass":"Pass","warning":"Warning","fail":"Fail"},"noInput":"Paste HTML code and click Check Mobile Friendliness.","guide":{"title":"How to Use","items":["View the source code of your web page (right-click → View Page Source) and copy all the HTML.","Paste the HTML into the text area above.","Click 'Check Mobile Friendliness' to run all mobile compatibility checks.","Review the score and the individual check results — green passes, yellow warnings, red failures.","Follow the recommendations for each failed or warned check to improve mobile-friendliness."]},"knowledge":{"title":"About Mobile-Friendly SEO","items":[{"title":"Mobile-First Indexing","content":"Since 2019, Google uses mobile-first indexing for all new websites, meaning it primarily crawls and indexes the mobile version of your content for ranking. Websites that are not mobile-friendly receive lower rankings in both mobile and desktop search results. With over 60% of global web traffic coming from mobile devices, mobile optimization is essential for SEO success and user engagement."},{"title":"Viewport Meta Tag","content":"The viewport meta tag (<meta name='viewport' content='width=device-width, initial-scale=1'>) is the single most critical element for mobile compatibility. Without it, mobile browsers render the page at desktop width (~980px) and then scale it down, resulting in tiny text and elements. The 'width=device-width' value sets the viewport to the device's screen width, and 'initial-scale=1' prevents initial zoom. This tag is required for Google to consider a page mobile-friendly."},{"title":"Tap Target Sizes","content":"Google recommends that all tappable elements (buttons, links, form inputs) should be at least 48×48 CSS pixels in size and have at least 8px of padding between adjacent targets to prevent accidental taps. Small tap targets are a major source of mobile usability issues. If links or buttons are too small or too close together, users must zoom in to tap accurately, leading to frustration and high bounce rates."},{"title":"Responsive Design Techniques","content":"Responsive design uses CSS media queries to adapt layout and content to different screen sizes. Key techniques include: flexible grids (using percentages instead of fixed pixels), flexible images (max-width: 100%), media queries to apply different styles at breakpoints, avoiding fixed-width elements wider than the viewport, and using relative units (em, rem, vw, vh) instead of absolute pixels for font sizes and spacing."}],"featuresTitle":"Key Features","features":["Checks for viewport meta tag presence and correct configuration","Detects small font sizes that may require zooming to read on mobile","Identifies Flash/plugin usage that doesn't work on modern mobile devices","Checks for responsive CSS media queries that indicate responsive design"],"applicationsTitle":"Common Applications","applications":["Auditing existing pages for mobile-friendliness issues before Google indexing","Checking third-party page templates and themes for mobile compatibility","Diagnosing why a page fails Google's Mobile-Friendly Test","Training developers on mobile SEO requirements and best practices"]}},"seo-ogTagsGenerator":{"title":"Open Graph Tags Generator","description":"Generate Open Graph meta tags for social media sharing with live preview","ogTitle":"og:title","ogTitlePlaceholder":"Page title for social media","ogDescription":"og:description","ogDescriptionPlaceholder":"Page description for social media (150-160 chars)","ogImage":"og:image","ogImagePlaceholder":"https://example.com/image.jpg (1200x630px recommended)","ogUrl":"og:url","ogUrlPlaceholder":"https://example.com/page","ogType":"og:type","ogSiteName":"og:site_name","ogSiteNamePlaceholder":"Your Site Name","ogLocale":"og:locale","generateButton":"Generate OG Tags","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","previewTitle":"Social Media Preview","previewImageAlt":"Preview image","guide":{"title":"How to Use","items":["Fill in og:title with the title you want shown when shared on social media (can differ from page title).","Write an og:description that grabs attention — it appears as the excerpt under the title in social previews.","Add an og:image URL pointing to an image at least 1200×630 pixels for best display quality.","Enter the canonical og:url for this page (use the full URL including https://).","Click 'Generate OG Tags' to create the code, check the social media preview, then copy into your HTML <head>."]},"knowledge":{"title":"About Open Graph Protocol","items":[{"title":"What is Open Graph?","content":"Open Graph (OG) is a protocol created by Facebook in 2010 that enables any web page to become a rich object in a social graph. By adding OG meta tags, you control how your content appears when shared on Facebook, LinkedIn, Slack, Discord, WhatsApp, and many other platforms. Without OG tags, these platforms scrape arbitrary content from your page, often with poor results."},{"title":"og:image Best Practices","content":"The og:image tag specifies the image shown in the social share preview card. Best practices: use at least 1200×630 pixels for high-resolution displays, keep file size under 8MB, use JPG or PNG format, avoid text-heavy images since they get cropped on mobile. Facebook caches images heavily — use a unique URL when updating an image to force a cache refresh."},{"title":"og:type Values","content":"The og:type tag describes the type of content. Common values include: 'website' (default, for general web pages), 'article' (for blog posts and news), 'product' (for e-commerce), 'video.movie' or 'video.episode' (for video content), and 'music.song' or 'music.album' (for music). Some platforms like Facebook render richer previews for specific content types."},{"title":"og:locale and Multilingual","content":"The og:locale tag specifies the language and territory of your content using IETF language tags (e.g., 'en_US', 'zh_CN', 'es_ES'). For multilingual sites, you can use og:locale:alternate to list alternative language versions. This helps social platforms serve the correct language version and improves the sharing experience for international audiences."}],"featuresTitle":"Key Features","features":["Generates all essential OG tags: title, description, image, url, type, site_name, locale","Live social media preview card showing how the content will appear when shared","One-click copy of the complete generated HTML code","Supports all og:type values with a dropdown selector"],"applicationsTitle":"Common Applications","applications":["Optimizing how blog posts and articles appear when shared on social media","Creating custom share previews for product pages in e-commerce","Ensuring brand consistency across all social media sharing","Debugging why a page's share preview shows incorrect content"]}},"seo-robotsTxtTester":{"title":"Robots.txt Tester","description":"Test robots.txt rules to see if a crawler can access a specific URL","robotsLabel":"Robots.txt Content","robotsPlaceholder":"User-agent: *\nDisallow: /private/\nAllow: /public/\n\nUser-agent: Googlebot\nDisallow: /no-google/","userAgentLabel":"User-Agent to Test","userAgentPlaceholder":"Googlebot","testUrlLabel":"URL to Test","testUrlPlaceholder":"https://example.com/some/path","testButton":"Test","resultTitle":"Test Result","allowed":"Allowed","disallowed":"Disallowed","matchedRule":"Matched Rule","noMatch":"No matching rule (default: allowed)","guide":{"title":"How to Use","items":["Paste your robots.txt content into the first text area.","Enter the user-agent name you want to test (e.g., 'Googlebot', 'Bingbot', '*' for all).","Enter the full URL you want to test for crawler access.","Click 'Test' to see if the specified crawler is allowed or blocked from the URL.","The result shows the access decision (Allowed/Disallowed) and the specific rule that matched."]},"knowledge":{"title":"About Robots.txt","items":[{"title":"How Robots.txt Works","content":"The robots.txt file is a standard used by websites to communicate with web crawlers about which pages should not be crawled or indexed. It must be placed in the root directory of your website (e.g., https://example.com/robots.txt). Each section starts with 'User-agent:' followed by rules. The wildcard '*' applies to all crawlers. Crawlers check this file before crawling any page on your site."},{"title":"Allow vs Disallow Rules","content":"Disallow rules block crawlers from accessing matching paths. Allow rules explicitly permit access, overriding more general Disallow rules. When multiple rules match a URL, the most specific rule (longest match) wins. For example, 'Disallow: /private/' blocks all paths starting with /private/, but 'Allow: /private/public.html' would allow that specific page even if the parent directory is disallowed."},{"title":"Common Robots.txt Patterns","content":"Common robots.txt patterns include: blocking all crawlers ('User-agent: * / Disallow: /'), blocking only Googlebot ('User-agent: Googlebot / Disallow: /'), blocking specific directories ('Disallow: /admin/'), blocking URL parameters ('Disallow: /*?*'), and including a Sitemap directive ('Sitemap: https://example.com/sitemap.xml'). The Sitemap directive helps search engines find your sitemap automatically."},{"title":"Robots.txt Limitations","content":"Robots.txt prevents crawling but does NOT prevent indexing. A page can be indexed even if blocked in robots.txt if other pages link to it. To prevent indexing, use the 'noindex' meta tag or X-Robots-Tag HTTP header instead. Also note that robots.txt is a voluntary standard — malicious bots may ignore it. Never use robots.txt to hide sensitive content; use proper authentication instead."}],"featuresTitle":"Key Features","features":["Parses robots.txt rules for any user-agent including wildcards","Tests specific URL paths against Allow and Disallow directives","Shows the matched rule that determined the access decision","Handles rule precedence: most specific (longest) rule wins"],"applicationsTitle":"Common Applications","applications":["Verifying that Googlebot can access important pages after updating robots.txt","Debugging why certain pages are not being indexed by search engines","Testing robots.txt rules before deploying changes to production","Confirming that sensitive directories are properly blocked from all crawlers"]}},"seo-schemaGenerator":{"title":"JSON-LD Schema Generator","description":"Generate JSON-LD structured data markup for rich search results","schemaType":"Schema Type","schemaTypes":{"Article":"Article","WebPage":"Web Page","Product":"Product","Organization":"Organization","Person":"Person","FAQ":"FAQ","BreadcrumbList":"Breadcrumb List"},"generateButton":"Generate Schema","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated JSON-LD Code","addFaqItem":"Add FAQ Item","addBreadcrumb":"Add Breadcrumb","removeFaqItem":"Remove","question":"Question","answer":"Answer","name":"Name","url":"URL","articleFields":{"headline":"Headline","author":"Author Name","datePublished":"Date Published","dateModified":"Date Modified","description":"Description","image":"Image URL","publisher":"Publisher Name","publisherLogo":"Publisher Logo URL"},"productFields":{"name":"Product Name","description":"Description","image":"Image URL","brand":"Brand Name","sku":"SKU","price":"Price","currency":"Currency","availability":"Availability","ratingValue":"Rating Value","reviewCount":"Review Count"},"organizationFields":{"name":"Organization Name","url":"Website URL","logo":"Logo URL","description":"Description","telephone":"Telephone","email":"Email","address":"Street Address","city":"City","country":"Country"},"personFields":{"name":"Full Name","url":"Profile URL","image":"Photo URL","jobTitle":"Job Title","email":"Email","description":"Bio / Description"},"guide":{"title":"How to Use","items":["Select the Schema type that best matches your page content (Article for blog posts, Product for shop pages, etc.).","Fill in the form fields — required fields should be completed for valid schema markup.","Click 'Generate Schema' to create the JSON-LD code.","Copy the generated code and paste it into your page's HTML, inside a <script type='application/ld+json'> tag.","Use Google's Rich Results Test (search.google.com/test/rich-results) to validate your schema markup."]},"knowledge":{"title":"About Structured Data / Schema.org","items":[{"title":"What is JSON-LD?","content":"JSON-LD (JavaScript Object Notation for Linked Data) is the recommended format by Google for adding structured data to web pages. It uses a <script type='application/ld+json'> tag in the HTML head or body, keeping the markup separate from the visible content. This makes it easier to maintain than inline Microdata or RDFa formats. Google's official documentation recommends JSON-LD as the preferred structured data format."},{"title":"Rich Results from Schema","content":"Structured data markup can enable rich results (also called rich snippets) in Google Search. These enhanced listings include: star ratings and review counts for products, FAQ dropdowns, recipe details (cooking time, calories), event information (date, location), how-to steps, and more. Rich results significantly increase visibility and click-through rates compared to standard blue link results."},{"title":"FAQ Schema","content":"FAQ (Frequently Asked Questions) schema is one of the most accessible rich result types that directly shows question-and-answer pairs in Google search results as expandable dropdowns. This can double or triple the SERP real estate your result occupies. Use FAQ schema on pages that genuinely answer common questions. Google limits FAQ rich results to authoritative sites and may not show them for all pages."},{"title":"Schema Validation","content":"After adding schema markup, always validate it using Google's Rich Results Test (search.google.com/test/rich-results) or Schema.org's validator (validator.schema.org). Common validation errors include: missing required properties (like 'name' for Organization), incorrect date formats (must be ISO 8601: YYYY-MM-DD), invalid price values, and using non-standard property names. Fix all errors before deployment to ensure eligibility for rich results."}],"featuresTitle":"Key Features","features":["Supports 7 schema types: Article, WebPage, Product, Organization, Person, FAQ, BreadcrumbList","Dynamic form fields that change based on selected schema type","Generates valid JSON-LD wrapped in the correct <script> tag","One-click copy for immediate use in any HTML page"],"applicationsTitle":"Common Applications","applications":["Adding Article schema to blog posts for enhanced search appearances","Setting up Product schema for e-commerce pages to show price and ratings","Adding FAQ schema to support pages to enable expandable questions in SERP","Creating Organization schema for the homepage to establish brand information"]}},"seo-serpPreview":{"title":"SERP Preview Tool","description":"Preview how your page appears in Google search results","urlLabel":"Page URL","urlPlaceholder":"https://example.com/your-page","titleLabel":"Page Title","titlePlaceholder":"Enter your page title...","descriptionLabel":"Meta Description","descriptionPlaceholder":"Enter your meta description...","previewTitle":"Google Search Preview","charCount":"characters","titleStatus":{"tooShort":"Too short (aim for 50-60 chars)","good":"Good length","tooLong":"Too long (will be truncated)"},"descStatus":{"tooShort":"Too short (aim for 150-160 chars)","good":"Good length","tooLong":"Too long (will be truncated)"},"suggestions":"Optimization Tips","guide":{"title":"How to Use","items":["Enter the full URL of your page (including https://).","Type or paste your page title in the Title field — watch the character counter.","Enter your meta description — aim for 150-160 characters for optimal display.","The preview below updates in real-time to show how your result looks in Google.","Review the optimization tips and adjust your title and description until both show 'Good length'."]},"knowledge":{"title":"About SERP Optimization","items":[{"title":"Optimal Title Length","content":"Google typically displays 50-60 characters of a page title in search results. Titles longer than ~60 characters get truncated with '...' at the end. Place your most important keyword near the beginning of the title and include your brand name at the end separated by a dash or pipe character. A well-crafted title directly influences click-through rates and is one of the most impactful on-page SEO elements."},{"title":"Meta Description Best Practices","content":"While meta descriptions are not a direct Google ranking factor, they significantly impact click-through rates from search results. Google displays approximately 150-160 characters for most queries (fewer on mobile). Write descriptions that accurately summarize the page content, include the target keyword naturally, and end with a compelling call to action. Google may override your description with page content if it deems another snippet more relevant."},{"title":"URL Structure in SERP","content":"Google displays the breadcrumb path of the URL below the title. Clean, readable URLs improve click-through rates and help users understand page context. Best practices: use lowercase letters, separate words with hyphens (not underscores), keep URLs short, include the target keyword in the URL slug, and avoid unnecessary parameters. A URL like /seo/keyword-density is far better than /page?id=123."},{"title":"Rich Results and Schema","content":"Beyond standard SERP listings, structured data (Schema.org markup) can earn rich results like star ratings, FAQ dropdowns, recipe details, and event dates that appear directly in search results. Rich results occupy more space on the SERP and typically receive higher click-through rates. Use the Schema Generator tool to add structured data markup to your pages for eligibility."}],"featuresTitle":"Key Features","features":["Real-time Google SERP preview showing title, URL breadcrumb, and description","Character counters with color-coded status indicators for title and description","Optimization tips based on Google's recommended length guidelines","Shows exactly how truncation affects your title and description"],"applicationsTitle":"Common Applications","applications":["Testing title and description variations before publishing a page","Auditing existing pages to identify truncation issues","Training content writers on SEO title and description best practices","A/B testing different meta descriptions for improved click-through rates"]}},"seo-sitemapGenerator":{"title":"XML Sitemap Generator","description":"Generate standard XML sitemap files from a list of URLs","urlsLabel":"URLs (one per line)","urlsPlaceholder":"https://example.com/\nhttps://example.com/about\nhttps://example.com/contact","changefreqLabel":"Change Frequency","changefreqOptions":{"always":"Always","hourly":"Hourly","daily":"Daily","weekly":"Weekly","monthly":"Monthly","yearly":"Yearly","never":"Never"},"priorityLabel":"Priority","lastmodLabel":"Include Last Modified Date","lastmodDateLabel":"Last Modified Date","generateButton":"Generate Sitemap","copyButton":"Copy XML","copiedButton":"Copied!","downloadButton":"Download sitemap.xml","outputLabel":"Generated sitemap.xml","urlCount":"URLs","guide":{"title":"How to Use","items":["Enter all your website URLs in the text area, one URL per line (include the full URL with https://).","Select the default change frequency (how often the content changes) — this is a hint to search engines.","Set the default priority (0.1 to 1.0) — higher means more important; 0.5 is the default for most pages.","Toggle 'Include Last Modified Date' to add today's date as the lastmod for all URLs.","Click 'Generate Sitemap' to create the XML, then copy or download the sitemap.xml file and upload it to your website root."]},"knowledge":{"title":"About XML Sitemaps","items":[{"title":"What is a Sitemap?","content":"A sitemap is an XML file that lists the pages of your website to tell search engines about the pages available for crawling. Sitemaps help search engines discover all your content, especially pages that may not be easily found through internal links. The standard sitemap protocol is defined at sitemaps.org and is supported by Google, Bing, Yahoo, and other search engines."},{"title":"Priority and changefreq Explained","content":"The <priority> tag (0.1 to 1.0) tells search engines the relative importance of pages within your site — it doesn't affect how your pages rank relative to other sites. The <changefreq> tag is a hint about how often a page is updated. Both values are advisory — Google may not strictly follow them. Focus on accurate priority values for important pages like your homepage (1.0) and key landing pages (0.8)."},{"title":"Sitemap Size Limits","content":"A single XML sitemap can contain a maximum of 50,000 URLs and must not exceed 50MB uncompressed (10MB compressed). If your site has more pages, you need to create multiple sitemaps and reference them from a sitemap index file. Most websites with under 50,000 pages only need one sitemap file. After generating and uploading your sitemap, submit it via Google Search Console."},{"title":"Sitemap Index Files","content":"For large websites with many URLs, you can create a sitemap index file that points to multiple individual sitemap files. The sitemap index follows the same XML format but uses <sitemapindex> as the root element with <sitemap> child elements, each containing a <loc> (sitemap URL) and optional <lastmod>. Submit only the sitemap index URL to Google Search Console — it will automatically process all referenced sitemaps."}],"featuresTitle":"Key Features","features":["Generates valid XML sitemap with proper namespace declarations","Configurable changefreq and priority for all URLs","Optional lastmod date for last-modified tracking","Download as sitemap.xml file or copy the XML code"],"applicationsTitle":"Common Applications","applications":["Creating a sitemap for a new website before first Google Search Console submission","Regenerating the sitemap after adding new pages to a website","Creating sitemaps for static sites that don't have automatic sitemap generation","Testing sitemap XML format before uploading to the server"]}},"seo-sitemapValidator":{"title":"XML Sitemap Validator","description":"Validate your XML sitemap format, check URL counts, and list all URLs","inputLabel":"Paste Sitemap XML Content","inputPlaceholder":"Paste your sitemap.xml content here...","validateButton":"Validate","clearButton":"Clear","resultsTitle":"Validation Results","urlListTitle":"URLs Found","status":{"valid":"Valid","invalid":"Invalid","warnings":"Valid with Warnings"},"stats":{"urlCount":"URL Count","hasNamespace":"Namespace","hasLastmod":"Has lastmod","hasPriority":"Has priority","hasChangefreq":"Has changefreq"},"errors":"Errors","warnings":"Warnings","noInput":"Paste sitemap XML content and click Validate.","guide":{"title":"How to Use","items":["Download your sitemap.xml file or copy its content from your web server.","Paste the complete XML content into the text area above.","Click 'Validate' to check the sitemap format, namespace, and URL structure.","Review any errors (must fix) or warnings (recommended to fix) in the results.","The URL list shows all discovered URLs — verify that all important pages are included."]},"knowledge":{"title":"About Sitemap Validation","items":[{"title":"Required Sitemap Elements","content":"A valid XML sitemap must have: the XML declaration (<?xml version='1.0' encoding='UTF-8'?>), the <urlset> root element with the correct xmlns namespace (http://www.sitemaps.org/schemas/sitemap/0.9), and at least one <url> element containing a <loc> tag with a valid absolute URL. All other elements (<lastmod>, <changefreq>, <priority>) are optional but should be properly formatted if present."},{"title":"Common Sitemap Errors","content":"The most common sitemap errors include: missing or incorrect XML namespace declaration, relative URLs in <loc> tags (must be absolute with https://), invalid date format in <lastmod> (must be W3C Datetime like YYYY-MM-DD), priority values outside the 0.0-1.0 range, invalid changefreq values (must be one of: always, hourly, daily, weekly, monthly, yearly, never), and exceeding the 50,000 URL limit per sitemap file."},{"title":"Sitemap Testing Tools","content":"After validating your sitemap locally, submit it to Google Search Console for indexing insights. Google Search Console's Coverage report shows how many URLs from your sitemap are indexed vs. excluded. You can also view sitemap processing status and errors. For Bing, use Bing Webmaster Tools. Always re-submit your sitemap after major website updates to ensure search engines index your new content promptly."},{"title":"Image and Video Sitemaps","content":"Standard sitemaps can be extended with specialized namespaces for images and videos. Image sitemaps use the namespace xmlns:image='http://www.google.com/schemas/sitemap-image/1.1' and <image:image> elements. Video sitemaps use xmlns:video='http://www.google.com/schemas/sitemap-video/1.1'. These extensions help Google better understand rich media content and can improve image and video search visibility."}],"featuresTitle":"Key Features","features":["Validates XML format, namespace declarations, and required elements","Checks URL format validity and ensures all URLs are absolute","Verifies 50,000 URL limit and other sitemap constraints","Lists all discovered URLs for easy verification"],"applicationsTitle":"Common Applications","applications":["Verifying a newly created sitemap before submitting to Google Search Console","Troubleshooting why Google Search Console shows sitemap errors","Auditing a sitemap from an automated generator for quality assurance","Checking that all important pages are included in the sitemap"]}},"seo-titleGenerator":{"title":"SEO Title Generator","description":"Generate multiple SEO-optimized title suggestions using keywords and templates","primaryKeyword":"Primary Keyword","primaryKeywordPlaceholder":"e.g., keyword density","secondaryKeyword":"Secondary Keyword (optional)","secondaryKeywordPlaceholder":"e.g., SEO analysis","brandName":"Brand Name (optional)","brandNamePlaceholder":"e.g., MyTool","generateButton":"Generate Titles","clearButton":"Clear","resultsTitle":"Title Suggestions","charCount":"chars","copyTip":"Click to copy","noResults":"Enter a primary keyword and click Generate Titles.","guide":{"title":"How to Use","items":["Enter your primary keyword — the main topic or term you want the page to rank for.","Optionally add a secondary keyword to diversify the title variations generated.","Enter your brand name if you want it included in some title templates.","Click 'Generate Titles' to get multiple title suggestions based on proven SEO templates.","Review the character count for each suggestion — aim for 50-60 characters, and click any title to copy it."]},"knowledge":{"title":"About SEO Title Optimization","items":[{"title":"Title Tag Impact on Rankings","content":"The HTML title tag is one of the most important on-page SEO factors. Search engines use it to understand the primary topic of a page. Including your target keyword near the beginning of the title increases relevance signals. Google rewrites titles in about 61% of cases when it determines a better title exists, so well-crafted titles that closely match page content are more likely to be preserved."},{"title":"Click-Through Rate Optimization","content":"A great title isn't just for rankings — it's also a primary driver of click-through rates (CTR) from search results. Titles with numbers (e.g., '10 Best...'), power words (Ultimate, Complete, Free, Easy), questions (How to...?), and clear value propositions tend to attract more clicks. Higher CTR also sends positive signals to search engines about the relevance and quality of your page."},{"title":"Title Templates That Work","content":"Proven SEO title templates include: '[Keyword] - [Brand]' (simple and clean), 'How to [Keyword]: A Complete Guide', '[Number] Best [Keyword] Tools/Tips', '[Keyword]: Everything You Need to Know', 'The Ultimate [Keyword] Guide for [Year]', and '[Keyword] vs [Alternative]: Which is Better?'. Each template serves different search intents and can attract different types of searchers."},{"title":"Avoiding Duplicate Titles","content":"Every page on your website should have a unique title tag. Duplicate titles confuse search engines about which page to rank for a given query, leading to keyword cannibalization. Use site:yoursite.com in Google Search to check for duplicate titles, or use a site crawling tool. For e-commerce sites with thousands of product pages, use dynamic title generation based on product attributes like brand, model, and category."}],"featuresTitle":"Key Features","features":["Generates 10+ title variations using proven SEO title templates","Shows character count with color-coded indicators for optimal length","Click-to-copy functionality for each generated title","Combines primary keyword, secondary keyword, and brand name in variations"],"applicationsTitle":"Common Applications","applications":["Brainstorming title options for new blog posts and landing pages","A/B testing different title formats for higher click-through rates","Refreshing old page titles to improve search performance","Training content writers on effective SEO title writing"]}},"seo-twitterCardGenerator":{"title":"Twitter Card Generator","description":"Generate Twitter Card meta tags to control how your content appears on Twitter","cardType":"Card Type","cardTypes":{"summary":"Summary","summary_large_image":"Summary Large Image","app":"App","player":"Player"},"twitterTitle":"twitter:title","twitterTitlePlaceholder":"Title for Twitter (max 70 chars)","twitterDescription":"twitter:description","twitterDescriptionPlaceholder":"Description for Twitter (max 200 chars)","twitterImage":"twitter:image","twitterImagePlaceholder":"https://example.com/twitter-image.jpg","twitterSite":"twitter:site","twitterSitePlaceholder":"@yourtwitterhandle","twitterCreator":"twitter:creator","twitterCreatorPlaceholder":"@contentcreator","generateButton":"Generate Twitter Card","copyButton":"Copy Code","copiedButton":"Copied!","outputLabel":"Generated HTML Code","previewTitle":"Twitter Card Preview","guide":{"title":"How to Use","items":["Select the Card Type: 'Summary Large Image' is recommended for articles with compelling visuals.","Enter the twitter:title (max 70 characters) and twitter:description (max 200 characters).","Add the twitter:image URL — images should be at least 800×418 pixels for summary_large_image.","Add your twitter:site handle (your website's Twitter account) and twitter:creator (content author).","Click 'Generate Twitter Card' to create the code, then paste it into your HTML <head> section."]},"knowledge":{"title":"About Twitter Cards","items":[{"title":"Twitter Card Types Explained","content":"Twitter supports four card types: Summary (small square thumbnail with title and description — default for most pages), Summary Large Image (full-width rectangular image — best for articles and blog posts), App (designed to promote mobile apps with install links), and Player (embeds video or audio players directly in tweets). Summary Large Image cards get significantly more engagement than basic Summary cards."},{"title":"twitter:image Requirements","content":"For Summary cards, images should be at least 144×144 pixels with a 1:1 aspect ratio. For Summary Large Image cards, use at least 800×418 pixels with a 2:1 aspect ratio. Maximum file size is 5MB. Supported formats: JPG, PNG, WEBP, and GIF. Twitter fetches images and creates its own cached version — use Twitter Card Validator to preview how your card looks before publishing."},{"title":"twitter:site vs twitter:creator","content":"twitter:site is the Twitter @username of the website publishing the content (e.g., @YourCompany). twitter:creator is the @username of the content creator or author (e.g., @AuthorName). For multi-author publications, twitter:creator changes per article while twitter:site stays constant. Both fields help Twitter attribute content properly and can improve discoverability."},{"title":"Fallback to Open Graph","content":"If Twitter Card tags are not present, Twitter automatically uses Open Graph (og:) tags as a fallback. However, explicitly setting Twitter Card tags gives you more control over the card appearance. For example, twitter:image:alt lets you add alt text to the card image for accessibility. Using both Twitter Card and Open Graph tags is the recommended approach for maximum compatibility."}],"featuresTitle":"Key Features","features":["Supports all four Twitter Card types: summary, summary_large_image, app, player","Live preview showing how the card will look on Twitter","Character counters for title (70) and description (200) limits","Generates both twitter: meta tags and falls back gracefully to og: tags"],"applicationsTitle":"Common Applications","applications":["Optimizing article and blog post sharing on Twitter for maximum engagement","Setting up Twitter Cards for e-commerce product pages","Promoting mobile apps with Twitter App Cards","Ensuring brand assets and messaging display correctly in Twitter shares"]}},"shiftJisEncoder":{"convert":{"title":"Shift-JIS Encoding Converter","input":"Input","output":"Output","sjisToUtf8":"Shift-JIS → UTF-8","utf8ToSjis":"UTF-8 → Shift-JIS","convertButton":"Convert","swapButton":"Swap","clear":"Clear","copy":"Copy","copied":"Copied","hexInputPlaceholder":"Enter Shift-JIS encoded hex data...","textInputPlaceholder":"Enter Japanese text to convert...","outputPlaceholder":"Conversion result will appear here..."},"error":{"convertFailed":"Conversion failed"},"guide":{"title":"Instructions","items":["Shift-JIS to UTF-8: Enter hex data","UTF-8 to Shift-JIS: Enter Japanese text","Supports Japanese Kana and Kanji conversion"]},"knowledge":{"title":"Shift-JIS Knowledge","items":[{"title":"What is Shift-JIS?","content":"Shift-JIS is a Japanese character encoding developed by Microsoft and ASCII Corp, default encoding for Japanese Windows."},{"title":"Encoding Characteristics","content":"Variable-length encoding: single byte for ASCII, double byte for Japanese. Compatible with JIS X 0208."}],"featuresTitle":"Key Features","features":["Windows Japanese default","Variable length (1-2 bytes)","Kana and Kanji support"],"applicationsTitle":"Common Applications","applications":["Japanese Windows","Japanese websites","Japanese games and software"]}},"sinCalculator":{"title":"Sin Calculator","angle":"Angle (θ)","unit":"Unit","degrees":"Degrees","radians":"Radians","calculate":"Calculate","clear":"Clear","result":"Result (sin θ)","invalidInput":"Invalid input","guide":{"title":"How to Use","items":["Select the angle unit: Degrees or Radians.","Enter the angle value.","Click 'Calculate' to get the sine value.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Sine (sin)","introduction":"In trigonometry, the sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse in a right-angled triangle.","items":[{"title":"Formula","content":"sin(θ) = Opposite / Hypotenuse"},{"title":"Properties","content":"The sine function is periodic with a period of 2π (360°). Its value oscillates between -1 and 1."}],"featuresTitle":"Common Values","features":["sin(0°) = 0","sin(30°) = 0.5","sin(45°) ≈ 0.7071","sin(60°) ≈ 0.8660","sin(90°) = 1"],"applicationsTitle":"Applications","applications":["Analyzing waveforms in physics and acoustics","Calculating vertical components of vectors","Solving triangles in geometry"]}},"sm2":{"title":"SM2 Cryptography","keyPair":{"title":"Key Pair Management","generate":"Generate Key Pair","public":"Public Key","private":"Private Key","format":"Format","publicKeyPlaceholder":"Enter public key (Hex or PEM)","privateKeyPlaceholder":"Enter private key (Hex or PEM)","error":"Key pair generation failed","clearKey":"Clear Keys"},"crypto":{"title":"Encryption & Decryption","plainFormat":"Plain Text Format","cipherFormat":"Cipher Text Format","cipherStructure":"Cipher Structure","prefix04":"0x04 Prefix","includePrefix":"Include 0x04","plainPlaceholder":{"utf8":"Enter text to encrypt/decrypt","hex":"Enter hex string"},"cipherPlaceholder":{"base64":"Enter base64 text to decrypt","hex":"Enter hex string to decrypt"},"encryptButton":"Encrypt","decryptButton":"Decrypt","noInput":"Please enter text and key","error":"Operation failed","formatError":"Format conversion failed","invalidKey":"Invalid key format","invalidInput":"Invalid input format"},"knowledge":{"title":"About SM2","sections":[{"title":"What is SM2?","content":"SM2 is a public key cryptographic algorithm based on elliptic curves. It is part of Chinese commercial cryptography standard."},{"title":"Key Features","content":"SM2 provides similar security level as RSA-2048 with shorter key lengths, making it more efficient."},{"title":"Applications","content":"Widely used in Chinese financial systems, government systems, and digital certificates."},{"title":"Ciphertext Format & 04 Prefix","content":"According to the GB/T 32918.4 standard, SM2 encrypted output uses the uncompressed elliptic curve point format. The first byte must be 0x04, indicating that the subsequent data contains the full X and Y coordinates. This tool allows you to select whether to include this standard 0x04 prefix in the encrypted result. The ciphertext structure consists of C1 (public key point), C2 (encrypted data), and C3 (hash value)."},{"title":"Cipher Structure: C1C3C2 vs C1C2C3","content":"SM2 encryption defines two common ciphertext concatenations. The original Chinese state standard used the `C1C2C3` structure by default; however, the newer GB/T 32918.4-2016 standard mandates the `C1C3C2` structure. This tool uses `C1C3C2` as the default but provides a compatibility option for `C1C2C3`."},{"title":"Key Format: PEM vs Raw Hex","content":"Keys are typically stored and transmitted in the standard `PEM` format (e.g., Base64 encoded strings headered with `-----BEGIN PUBLIC KEY-----`). `Raw Hex` represents the raw hexadecimal data used by cryptographic algorithms. This tool natively supports conversion and parsing between these two formats for integration flexibility."}]},"signature":{"title":"Digital Signature","message":"Message to Sign","messagePlaceholder":"Enter message to sign","signatureResult":"Signature Result","signaturePlaceholder":"Signature will appear here","signButton":"Sign","verifyButton":"Verify","verifySuccess":"Signature verification successful!","verifyFail":"Signature verification failed!","noInput":"Please input required information","error":"Operation failed, please check your input"}},"sm3":{"title":"SM3 Hash Calculator","placeholder":"Hash result will be displayed here","clear":"Clear","algorithmInfo":"{bits} bits/{chars} characters","case":{"upper":"Upper","lower":"Lower"},"knowledge":{"title":"SM3 Algorithm Knowledge","items":[{"title":"Introduction","content":"SM3 is a cryptographic hash algorithm standard published by the State Cryptography Administration of China, used for digital signatures, message authentication codes, and random number generation."},{"title":"Features","content":"SM3 produces a 256-bit (32-byte) hash value and provides high security and computational efficiency."}],"featuresTitle":"SM3 Characteristics","features":["Compression: Messages of any length are compressed to a fixed length","One-way: Difficult to reverse engineer the original message from hash","Collision resistance: Hard to find two different messages with same hash","Avalanche effect: Small changes in input cause significant changes in output"],"applicationsTitle":"Applications","applications":["Digital signatures","Message integrity verification","Random number generation","Key derivation","E-government systems","Financial transaction systems"]},"error":"Failed to calculate SM3 hash","inputFormat":"Input Format","inputPlaceholder":{"utf8":"Enter text to hash...","hex":"Enter hexadecimal data (e.g., 48656C6C6F)..."}},"sm4":{"title":"SM4 Encryption","config":{"title":"Configuration","key":{"title":"Key","placeholder":{"text":"Enter text key or click generate","hex":"Enter 32-bit hex key or click generate"},"generate":"Generate Random Key","error":"Key must be 16 bytes (32 hex characters)"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter text IV or click generate","hex":"Enter 32-bit hex IV or click generate"},"generate":"Generate Random IV","error":"IV must be 16 bytes (32 hex characters)"},"mode":{"title":"Operation Mode","cbc":"CBC Mode (Recommended)","ecb":"ECB Mode"},"padding":{"title":"Padding Mode","pkcs#7":"PKCS#7 Padding (Recommended)","pkcs#5":"PKCS#5 Padding","none":"No Padding"}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter text to encrypt","hex":"Enter hex string","base64":"Enter Base64 string"},"cipherPlaceholder":{"hex":"Encrypted hex ciphertext","base64":"Encrypted Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV for CBC mode","noInput":"Please enter input text","invalidFormat":"Invalid input format","process":"Encryption/Decryption failed"}},"knowledge":{"title":"About SM4","sections":[{"title":"What is SM4?","content":"SM4 is a block cipher algorithm with 128-bit key length and block size."},{"title":"Operation Modes","content":"ECB mode is simple but less secure. CBC mode provides better security."},{"title":"Applications","content":"Widely used in Chinese financial systems and government applications."}]}},"sphereCalculator":{"title":"Sphere Calculator","description":"Calculate volume and surface area of a sphere.","keywords":"sphere calculator, volume of sphere, surface area of sphere","category":"Math","radius":"Radius (r)","calculate":"Calculate","result":"Results","volume":"Volume","surfaceArea":"Surface Area","circumference":"Circumference","diameter":"Diameter","clear":"Clear","guide":{"title":"How to Use","items":["Enter the radius of the sphere.","Click 'Calculate'.","Volume, Surface Area, Diameter, and Circumference will be displayed."]},"knowledge":{"title":"About Spheres","introduction":"A sphere is a geometrical object in three-dimensional space that is the surface of a ball.","items":[{"title":"Formulas","content":"Volume = (4/3) * π * r^3\nSurface Area = 4 * π * r^2"}],"featuresTitle":"Features","features":["Comprehensive sphere properties","Instant results"],"applicationsTitle":"Applications","applications":["Physics","Astronomy","Sports (balls)"]}},"sqlFormatter":{"title":"SQL Formatter","format":"Format","minify":"Minify","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","dialect":"Dialect","standard":"Standard SQL","mysql":"MySQL","postgresql":"PostgreSQL","sqlite":"SQLite","mariadb":"MariaDB","tsql":"T-SQL (SQL Server)","plsql":"PL/SQL (Oracle)","invalidSql":"Error formatting SQL","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format and minify SQL queries","Support for multiple SQL dialects (MySQL, PostgreSQL, etc.)","Syntax highlighting","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"SQL Knowledge","introduction":"SQL (Structured Query Language) is a standard language for managing data held in a relational database management system (RDBMS).","items":[{"title":"Basic Commands","content":"SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, ALTER"},{"title":"Clauses","content":"FROM, WHERE, GROUP BY, HAVING, ORDER BY, LIMIT"}],"featuresTitle":"Key Features","features":["Declarative language","Set-based processing","Standardized (ANSI/ISO)"],"applicationsTitle":"Applications","applications":["Data analysis","Backend development","Database administration"]}},"sqlMinify":{"title":"SQL Minifier","description":"Compress SQL queries by removing comments and unnecessary whitespace.","input":"Input SQL","output":"Minified SQL","minify":"Minify SQL","copy":"Copy","copied":"Copied to clipboard","success":"SQL minified successfully","error":"Error minifying SQL"},"ssh-key-generator":{"title":"SSH Key Generator","config":{"title":"SSH Parameters","algorithm":"Algorithm","comment":"Comment / Email Tag","generateBtn":"Generate SSH Keys"},"results":{"title":"SSH Keys Generated","publicKey":"Public Key (authorized_keys)","privateKey":"Private Key (id_rsa / id_ed25519)","downloadPub":"Download .pub","downloadPriv":"Download Private"}},"sslChecker":{"title":"SSL Checker","description":"Check the SSL/TLS certificate details for a domain, including expiration date, issuer, and validity.","input":{"label":"Domain Name","placeholder":"e.g., visualstudio.com","button":"Check SSL"},"result":{"title":"Certificate Details","subject":"Subject","issuer":"Issuer","validNoBefore":"Valid From","validNoAfter":"Valid Until","daysRemaining":"Days Remaining","serialNumber":"Serial Number","fingerprint":"Fingerprint (SHA-1)","valid":"Valid","expired":"Expired","error":"Error"},"guide":{"title":"How to use SSL Checker","items":["Enter the domain name (hostname) you want to check (e.g., google.com).","Click 'Check SSL' to retrieve the certificate information.","Review the certificate details, especially the expiration date."]},"knowledge":{"title":"About SSL Certificates","items":[{"title":"What is SSL/TLS?","content":"SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) are protocols for establishing authenticated and encrypted links between networked computers."},{"title":"Why check SSL?","content":"To ensure your website is secure, verify the identity of the certificate issuer, and prevent service interruptions due to expired certificates."},{"title":"Certificate Validity","content":"Certificates are issued for a specific period. It is crucial to renew them before they expire to maintain trust and security."}]}},"standardDeviationCalculator":{"title":"Standard Deviation Calculator","description":"Calculate the sample and population standard deviation of a dataset.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 10, 20, 30, 40, 50","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","sample":"Sample Standard Deviation","population":"Population Standard Deviation","guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate both sample and population standard deviations.","The sample standard deviation is used when your data is a sample of a larger population.","The population standard deviation is used when your data represents the entire population."]},"knowledge":{"title":"About Standard Deviation","introduction":"Standard deviation is a measure of the amount of variation or dispersion of a set of values.","items":[{"title":"Definition","content":"A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range."},{"title":"Sample vs Population","content":"Sample Standard Deviation (s): An estimate of the population standard deviation based on a sample. It divides by (n-1) where n is the sample size (Bessel's correction).\nPopulation Standard Deviation (σ): The exact standard deviation of an entire population. It divides by N where N is the population size."}],"featuresTitle":"Key Features","features":["Calculates both sample and population standard deviations.","Supports various input formats."],"applicationsTitle":"Applications","applications":["Risk assessment in finance (volatility).","Quality control in manufacturing.","Analyzing experimental data in science."]}},"statisticsCalculator":{"title":"Statistics Calculator","description":"Calculate comprehensive statistics for a dataset, including mean, median, mode, range, variance, and standard deviation.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 10, 20, 30, 40, 50 or 10 20 30 40 50","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","results":{"count":"Count","sum":"Sum","mean":"Mean (Average)","median":"Median","mode":"Mode","min":"Minimum","max":"Maximum","range":"Range","variance":"Sample Variance","stdDev":"Sample Standard Deviation"},"guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate the statistical properties.","The calculator will determine count, sum, mean, median, mode, range, variance, and standard deviation."]},"knowledge":{"title":"About Statistical Properties","introduction":"Descriptive statistics provide a summary of a dataset, helping to understand its central tendency, dispersion, and overall shape.","items":[{"title":"Measures of Central Tendency","content":"Mean (Average): The sum of all values divided by the number of values.\nMedian: The middle value when the data is sorted. If there is an even number of values, it's the average of the two middle values.\nMode: The value(s) that appear most frequently in the dataset."},{"title":"Measures of Dispersion","content":"Range: The difference between the maximum and minimum values.\nVariance: A measure of how much the values in the dataset vary from the mean.\nStandard Deviation: The square root of the variance, representing the average distance of the values from the mean."}],"featuresTitle":"Key Features","features":["Comprehensive statistical analysis in one tool.","Supports various input formats (comma, space, or newline separated).","Calculates both central tendency and dispersion metrics."],"applicationsTitle":"Applications","applications":["Data analysis and exploration.","Research and academic studies.","Quality control and process improvement."]}},"stopwatch":{"title":"Online Stopwatch with Laps","description":"A highly accurate online stopwatch supporting milliseconds.","start":"Start","stop":"Stop","resume":"Resume","reset":"Reset","lap":"Lap","clearLaps":"Clear Laps","lapTime":"Lap Time","splitTime":"Split Time","totalTime":"Total Time","lapNumber":"Lap #","guide":{"title":"How to Use","items":["Press the green Play button to start timing.","Press the red Stop button to pause the stopwatch.","Press the Flag button while running to record a lap split time.","Press Reset to clear the timer and all recorded laps.","Use 'Clear Laps' in the table header to remove lap records without resetting the timer."]},"knowledge":{"title":"About Stopwatches","sections":[{"title":"Centisecond Precision","content":"This stopwatch updates every 10ms, displaying time in hundredths of a second (centiseconds), suitable for most sports timing needs."},{"title":"Lap vs Split Time","content":"A lap time measures the duration of each individual lap. A split time shows the total elapsed time at the moment the lap button was pressed."},{"title":"Browser Accuracy","content":"JavaScript timers may have slight drift due to browser tab throttling. For professional-grade timing, dedicated hardware stopwatches are recommended."}]}},"subnetCalculator":{"title":"Subnet Calculator","description":"Calculate network details from IP address and subnet mask (CIDR).","ipAddress":"IP Address","cidr":"CIDR / Subnet Mask","calculate":"Calculate","results":{"networkAddress":"Network Address","broadcastAddress":"Broadcast Address","ipRange":"IP Range","firstHost":"First Host","lastHost":"Last Host","totalHosts":"Total Hosts","usableHosts":"Usable Hosts","subnetMask":"Subnet Mask","wildcardMask":"Wildcard Mask","binaryIp":"Binary IP","ipClass":"IP Class","ipType":"IP Type"},"guide":{"title":"How to use Subnet Calculator","items":["Enter an IP address (e.g., 192.168.1.1).","Select a subnet mask or enter CIDR notation (e.g., /24).","The calculator automatically updates the network details."]},"knowledge":{"title":"Subnetting Knowledge","items":[{"title":"What is Subnetting?","content":"Subnetting is the practice of dividing a network into two or more smaller networks. It increases routing efficiency and enhances network security."},{"title":"CIDR Notation","content":"Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. It uses a suffix (e.g., /24) to indicate the number of bits in the network prefix."}],"featuresTitle":"Key Features","features":["Real-time calculation","Support for all CIDR prefixes (/0 to /32)","Detailed network information including Broadcast and Range","Binary representation view"],"applicationsTitle":"Common Uses","applications":["Network planning and design","Configuring routers and switches","IP address management (IPAM)","Subnetting for security and performance"]}},"sum":{"title":"Checksum Calculator","inputFormat":"Input Format","clear":"Clear","inputPlaceholder":{"hex":"Enter hexadecimal numbers...","ascii":"Enter ASCII text to calculate checksum..."},"results":{"hex":"Checksum Result (Hex)","dec":"Checksum Result (Dec)","oct":"Checksum Result (Oct)","bin":"Checksum Result (Bin)"},"knowledge":{"title":"Checksum Knowledge","description":"Checksum is a simple data verification method that sums up all bytes in a data stream and takes the lower 8 bits as the checksum.","features":{"title":"Features","items":["Simple calculation: Only requires addition","Good real-time performance: Can calculate while receiving data","Low resource usage: Only needs one byte of storage","Suitable for embedded systems: Low processor requirements"]},"applications":{"title":"Applications","items":["File integrity verification","Network data transmission","Simple data transmission verification","Embedded device communication","Real-time data verification"]},"security":{"title":"Security Recommendations","items":["Not suitable for security-related scenarios","Recommended to use with other verification methods","Pay attention to data format correctness","Consider using stronger verification algorithms"]}},"error":{"noInput":"Please enter data to calculate","invalidHex":"Invalid hexadecimal format","calculation":"Error occurred during calculation"}},"sunriseSunset":{"title":"Sunrise & Sunset Calculator","description":"Calculate exact sunrise, sunset, dawn, dusk, and solar noon times.","location":"Location","latitude":"Latitude (e.g. 40.7128)","longitude":"Longitude (e.g. -74.0060)","getLiveLocation":"Use My Location","date":"Select Date","calculate":"Calculate","sunrise":"Sunrise","sunset":"Sunset","solarNoon":"Solar Noon","dayLength":"Day Length","dawn":"Dawn (Civil Twilight Begins)","dusk":"Dusk (Civil Twilight Ends)","timezone":"Timezone","locationError":"Could not access location. Please enter coordinates manually.","invalidCoordinates":"Please enter valid latitude (-90 to 90) and longitude (-180 to 180).","guide":{"title":"How to Use","items":["Allow location access when prompted, or enter your latitude and longitude manually.","Select the date you want to calculate sunrise and sunset times for.","Click 'Calculate' to get sunrise, sunset, solar noon, day length, dawn, and dusk.","All times are displayed in your local timezone.","Get coordinates from Google Maps by right-clicking any location on the map."]},"knowledge":{"title":"About Sunrise & Sunset","sections":[{"title":"Solar Angles","content":"Sunrise and sunset are calculated from the Sun's apparent position relative to the horizon, depending on your latitude, longitude, and the time of year."},{"title":"Civil Twilight","content":"Dawn (civil twilight begins) is when the Sun is 6° below the horizon — enough light for outdoor activities. Dusk is the equivalent evening moment."},{"title":"Seasonal Variation","content":"Day length varies dramatically by season and latitude. Near the poles, summer brings midnight sun (24h daylight) and winter brings polar night (0h daylight)."}]}},"svgToPng":{"title":"SVG to PNG Converter","description":"Convert SVG vector graphics to high-quality PNG raster images","uploadTitle":"Upload SVG File","resultTitle":"Converted PNG Image","guide":{"title":"How to Use","items":["Upload an SVG file by clicking or dragging","The SVG will render as a preview","Click 'Convert' to rasterize to PNG","The PNG output preserves SVG dimensions","Download the converted PNG file","SVG with embedded fonts may render differently","Transparent backgrounds are preserved in PNG output"]},"knowledge":{"title":"About SVG to PNG Conversion","items":[{"title":"Why Convert SVG to PNG?","content":"While SVG is excellent for scalable graphics, some applications and platforms only accept raster formats like PNG. Converting SVG to PNG is necessary for use in presentations, documents, social media, and applications that don't support vector graphics natively."},{"title":"Vector vs Raster Graphics","content":"SVG (Scalable Vector Graphics) uses mathematical paths to define shapes, allowing infinite scaling without quality loss. PNG is a raster format using pixels, which means it has fixed dimensions. When converting, the PNG captures the SVG at its current size."},{"title":"Preserving Quality","content":"This tool renders SVG at its native dimensions to produce a high-quality PNG. The transparent background is preserved when converting. For best results, ensure your SVG has proper viewBox and dimension attributes defined."},{"title":"Browser-Based Rendering","content":"The conversion uses the browser's native SVG rendering engine and HTML5 Canvas for rasterization. This ensures accurate rendering of SVG features and complete privacy since no files leave your device."}],"featuresTitle":"Key Features","features":["High-quality SVG to PNG rasterization","Preserves transparency from SVG","Uses browser native SVG rendering engine","No file upload required — 100% private"],"applicationsTitle":"Common Use Cases","applications":["Converting logos for social media profiles","Preparing icons for mobile app development","Creating PNG versions of diagrams for documents","Generating raster assets from vector designs"]}},"tanCalculator":{"title":"Tan Calculator","angle":"Angle (θ)","unit":"Unit","degrees":"Degrees","radians":"Radians","calculate":"Calculate","clear":"Clear","result":"Result (tan θ)","invalidInput":"Invalid input","undefined":"Undefined","guide":{"title":"How to Use","items":["Select the angle unit: Degrees or Radians.","Enter the angle value.","Click 'Calculate' to get the tangent value.","Click 'Clear' to reset the calculator."]},"knowledge":{"title":"About Tangent (tan)","introduction":"In trigonometry, the tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side in a right-angled triangle.","items":[{"title":"Formula","content":"tan(θ) = Opposite / Adjacent = sin(θ) / cos(θ)"},{"title":"Properties","content":"The tangent function is periodic with a period of π (180°). It is undefined at 90°, 270°, etc., where cos(θ) = 0."}],"featuresTitle":"Common Values","features":["tan(0°) = 0","tan(30°) ≈ 0.5774","tan(45°) = 1","tan(60°) ≈ 1.7321","tan(90°) = Undefined"],"applicationsTitle":"Applications","applications":["Calculating slopes and inclines","Determining heights and distances in surveying","Navigational calculations"]}},"terms":{"title":"Terms of Service","lastUpdated":"Last Updated: July 17, 2025","introduction":{"title":"Terms of Service Description","content":"Welcome to Online Calculator Tools! These Terms of Service constitute a legal agreement between you and Online Calculator Tools, defining your rights and obligations when using our services.\n\nBy accessing or using our website and services, you agree to comply with all terms and conditions of this agreement. If you do not agree to any part of this agreement, please do not use our services.\n\nWe recommend that you carefully read and understand these Terms of Service. If you have any questions, please feel free to contact us."},"sections":[{"title":"1. Service Description and Scope","content":"Online Calculator Tools is a professional online calculator tool platform providing the following services:","items":["Encryption/Decryption - AES, RSA, MD5, SHA1, SHA256, SHA512, etc.","Hash Calculation - MD5, SHA1, SHA256, SHA512, etc.","Checksum Calculation - CRC, LRC, etc.","Formatting Tools - JSON, XML, CSV, INI, TXT, etc.","Time Calculation - Timestamp Conversion, Time Difference Calculation, Time Formatting, etc.","Unit Conversion - Length, Angle, Area, Volume, Mass, Temperature, Time, Currency, etc.","Cron Expression - Linux Cron, Spring Cron, Quartz Cron, etc."]},{"title":"2. User Accounts and Responsibilities","content":"When using our services, you need to comply with the following regulations:","items":["Ensure that you provide true, accurate, and complete information","Properly safeguard your account information and login credentials","Take responsibility for all activities under your account","Update your contact information and related data in a timely manner","Do not transfer or lend your account to others","Notify us immediately if you discover unauthorized use of your account"]},{"title":"3. Usage Rules and Restrictions","content":"To maintain a good service environment, you agree to comply with the following usage rules:","items":["Use our tools only for legal online calculator related purposes","Do not use our services for any illegal or unlawful activities","Do not maliciously attack, damage, or interfere with our servers and networks","Do not spread viruses, malicious code, or harmful programs","Do not infringe upon others' intellectual property or other legitimate rights","Do not publish false, misleading, or harmful information content","Comply with relevant online calculator standards and safety regulations"]},{"title":"4. Intellectual Property Protection","content":"We strictly protect intellectual property rights, with the following regulations:","items":["All content on this website (including software, documentation, interface design, etc.) is protected by intellectual property law","Without authorization, you may not copy, modify, distribute, or reverse engineer our software","Do not remove or modify any copyright, trademark, or other intellectual property markings","Users may use service functions normally within our authorized scope","If intellectual property infringement is discovered, we will pursue legal responsibility according to law","Respect third-party intellectual property rights and do not infringe upon others' rights during use"]},{"title":"5. Privacy and Data Protection","content":"We are committed to protecting user privacy and data security:","items":["Strictly process user personal information according to our privacy policy","Adopt appropriate technical and management measures to protect user data","Will not access, use, or disclose user data without authorization","Tools prioritize client-side data processing to reduce data transmission","Users are responsible for their own input online calculator data; we do not bear responsibility for data content","We recommend users not to input confidential or sensitive online calculator data in tools"]},{"title":"6. Service Fees and Payment","content":"Regarding service fees:","items":["Basic tool functions are provided free to all users","Advanced functions or enterprise services may incur corresponding fees","Specific prices for paid services will be clearly marked on service pages","Payment methods and processes will be determined according to service type","Virtual services generally do not support refunds once delivered","We reserve the right to adjust service prices but will notify existing users in advance"]},{"title":"7. Service Availability and Maintenance","content":"Regarding service stability and maintenance:","items":["We strive to maintain service stability and availability","Services may be temporarily interrupted due to system maintenance, upgrades, etc.","Important maintenance activities will be notified to users in advance","We are not responsible for service interruptions caused by force majeure factors (such as natural disasters, government regulations, etc.)","Network failures, server failures, and other technical issues may affect normal service use","We will try to restore services quickly but do not guarantee specific recovery times"]},{"title":"8. Liability Limitation and Disclaimer","content":"Regarding service liability limitations and disclaimer clauses:","items":["The tools on this website are for reference use only; we do not guarantee absolute accuracy of results","Users should verify tool output results according to actual circumstances","We are not liable for any losses arising from using our services","We are not responsible for indirect losses, profit losses, data losses, etc.","Our total liability does not exceed the service fees paid by users","We recommend users conduct sufficient testing and verification before using in production environments"]},{"title":"9. Service Changes and Termination","content":"Regarding service changes and termination regulations:","items":["We reserve the right to modify, suspend, or terminate services at any time","Major changes will be notified to users in advance with reasonable transition time","If users violate the terms of service, we have the right to terminate their usage rights","When services are terminated, users should stop using related functions","We will properly handle user data but do not guarantee permanent data preservation","Service termination does not affect the rights and obligations arising before termination"]},{"title":"10. Dispute Resolution and Legal Application","content":"Regarding dispute handling regulations:","items":["Both parties should first resolve disputes through friendly negotiation","If some agreement clauses are invalid, it does not affect the validity of other clauses","We reserve the right to final interpretation of agreement terms","When applicable laws change, the agreement will be adjusted accordingly"]},{"title":"11. Terms Updates and Notifications","content":"Regarding terms update regulations:","items":["We reserve the right to modify these Terms of Service at any time","Important modifications will be notified to users through website announcements, emails, etc.","Updated terms will be published on the website and take effect immediately","Continued use of services is deemed as agreement to modified terms","We recommend users regularly check this page to understand the latest Terms of Service","If you do not agree to modified terms, please stop using our services"]},{"title":"12. Contact Information and Feedback","content":"If you have any questions or need support, please contact us:","contact":{"email":"support@calctools.online","purpose":"Terms of service consultation, complaints and suggestions, technical support, etc.","responseTime":"We will reply within 2 business days after receiving contact","businessHours":"Service hours: Monday to Friday 9:00-18:00"}}]},"text":{"title":"Text Tools","description":"Collection of various text processing and conversion tools","tools":{"caseConverter":{"title":"Case Converter | Text Case Transformation Tool","description":"Free online text case converter. Instantly convert text to Uppercase, Lowercase, Title Case, Sentence Case, CamelCase, and more. Supports batch processing for developers and writers.","guide":{"title":"How to Use Case Converter","items":["Paste or type your text into the input box.","Select your desired format (e.g., 'UPPERCASE', 'camelCase').","The text converts instantly.","Click 'Copy' to use the result."]},"knowledge":{"title":"About Text Case","items":[{"title":"Why Convert Case?","content":"Different contexts require different text formats. Coding often requires specific naming conventions (like camelCase), while writing needs Title Case for headlines."},{"title":"Supported Formats","content":"Supports standard programming conventions (Camel, Pascal, Snake, Kebab) and general text styles (Upper, Lower, Title, Sentence)."}],"featuresTitle":"Key Features","features":["8+ conversion modes","Instant processing","Privacy-first: No server upload","One-click copy"],"applicationsTitle":"Common Applications","applications":["Variable renaming (coding)","Headline formatting","Data standardization","CSS class generation"]},"ui":{"uppercase":"UPPERCASE","lowercase":"lowercase","titleCase":"Title Case","sentenceCase":"Sentence case","camelCase":"camelCase","pascalCase":"PascalCase","snakeCase":"snake_case","kebabCase":"kebab-case"}},"camelCase":{"title":"Camel Case Converter | Text to camelCase","description":"Online Camel Case generator. Convert text to camelCase format instantly. Removes spaces/punctuation, lowercase first word, capitalizes subsequent words. Ideal for Java/JS variables.","guide":{"title":"How to Use Camel Case Converter","items":["Enter your text or sentence.","Text converts to camelCase (e.g., myVariableName) automatically.","Copy the result for your code."]},"knowledge":{"title":"About Camel Case","items":[{"title":"What is Camel Case?","content":"Camel Case is a naming convention where words are joined without spaces, and each word (except the first) begins with a capital letter."}],"featuresTitle":"Features","features":["Instant conversion","Removes special characters","Developer friendly"],"applicationsTitle":"Applications","applications":["Java variables","JavaScript functions","JSON keys"]}},"snakeCase":{"title":"Snake Case Converter | Text to snake_case","description":"Online Snake Case generator. Convert text to snake_case (lowercase with underscores). Perfect for Python variables and database fields.","guide":{"title":"How to Use","items":["Input text.","Get snake_case result (my_variable_name).","Copy to clipboard."]},"knowledge":{"title":"About Snake Case","items":[{"title":"Definition","content":"Snake Case separates words with underscores (_) and uses all lowercase letters. It is standard in Python and SQL."}],"featuresTitle":"Features","features":["Lowercase only","Underscore separator","Readable"],"applicationsTitle":"Applications","applications":["Python coding","Database column names","File naming"]}},"kebabCase":{"title":"Kebab Case Converter | Text to kebab-case","description":"Online Kebab Case generator. Convert text to kebab-case (lowercase with hyphens). Essential for URL slugs and CSS class names.","guide":{"title":"How to Use","items":["Type text.","View kebab-case result (my-variable-name).","Copy instantly."]},"knowledge":{"title":"About Kebab Case","items":[{"title":"Definition","content":"Kebab Case (or Spinal Case) uses hyphens (-) to separate words. It is the standard for URLs and CSS classes."}],"featuresTitle":"Features","features":["URL safe","CSS compatible","Hyphenated"],"applicationsTitle":"Applications","applications":["SEO URLs","CSS Classes","Kubernetes resources"]}},"pascalCase":{"title":"Pascal Case Converter | Text to PascalCase","description":"Online Pascal Case generator. Convert text to PascalCase (UpperCamelCase). Capitalize every word, no separators. Best for class names.","guide":{"title":"How to Use","items":["Enter text.","Get PascalCase result (MyClassName).","Copy output."]},"knowledge":{"title":"About Pascal Case","items":[{"title":"Definition","content":"Pascal Case is similar to Camel Case but the first letter is also capitalized. It is widely used for class names in C#, Java, and other languages."}],"featuresTitle":"Features","features":["Capitalized words","No separators","Clean format"],"applicationsTitle":"Applications","applications":["Class names","Constructors","Interface names"]}},"titleCase":{"title":"Title Case Converter | Capitalize Every Word","description":"Online Title Case tool. Capitalize the first letter of each word in your text. Perfect for headlines, book titles, and subject lines.","guide":{"title":"How to Use","items":["Input your headline.","Convert to Title Case (My Article Title).","Copy for publication."]},"knowledge":{"title":"About Title Case","items":[{"title":"Usage","content":"Title Case capitalizes the major words in a sentence, commonly used for titles of works, headlines, and headers."}],"featuresTitle":"Features","features":["Smart capitalization","Preserves spaces","Professional look"],"applicationsTitle":"Applications","applications":["Blog titles","Book names","Email subjects"]}},"wordCounter":{"title":"Online Word Counter | Real-time Word and Character Count","description":"Free online word counter tool. Count words, characters (with/without spaces), lines, and paragraphs in real-time. Ideal for writing, SEO, and translation.","guide":{"title":"How to Use Word Counter","items":["Type or paste your text directly into the input area.","Statistics for words, characters, lines, etc., update instantly.","Click the 'Clear' button to reset the text and counters.","Use the 'Copy' button to copy your text with one click."]},"knowledge":{"title":"About Word Counting","items":[{"title":"Word vs. Character Count","content":"'Word Count' tracks the number of distinct words (separated by spaces), vital for English essays. 'Character Count' includes all symbols and punctuation, often used for social media limits or Chinese text."},{"title":"Characters Without Spaces","content":"This metric excludes all whitespace (spaces, tabs, newlines), providing a precise count of visible content characters, useful for translation pricing or specific formatting requirements."}],"featuresTitle":"Key Features","features":["Instant real-time analysis","Comprehensive stats: Words, Characters, Lines, Paragraphs","High performance with large texts","Privacy-focused: Text is processed locally, never uploaded"],"applicationsTitle":"Common Applications","applications":["Blog posts and article writing","Social media post length checks (Twitter, etc.)","Translation workload estimation","Code and script analysis"]},"ui":{"words":"Words","characters":"Characters","lines":"Lines","paragraphs":"Paragraphs","noSpaces":"Chars (No Spaces)"}},"frequencyAnalyzer":{"title":"Word Frequency Analyzer | Text Statistics","description":"Online word frequency counter. Analyze text to find the most frequent words and characters. Supports case sensitivity and stop word filtering.","ui":{"results":"Frequency Results","word":"Word","count":"Count","frequency":"Frequency","graph":"Graph","showingTop100":"Showing top 100 most frequent words"},"guide":{"title":"How to Use","items":["Paste your text.","The tool automatically generates a frequency list.","View the chart for visual distribution.","Toggle case sensitivity if needed."]},"knowledge":{"title":"About Frequency Analysis","items":[{"title":"Term Frequency","content":"The number of times a word appears in a document. Used in SEO and cryptography."}],"featuresTitle":"Features","features":["Automatic tokenization","Frequency sorting","Visual charts","Multi-language support"],"applicationsTitle":"Applications","applications":["SEO Keyword analysis","Stylometry","Language learning","Text mining"]}},"removeWhitespace":{"title":"Remove Whitespace | Text Cleaner","description":"Online whitespace remover. Delete all spaces, tabs, and line breaks from text, or just trim leading/trailing whitespace.","ui":{"allWhitespace":"All Whitespace","spacesOnly":"Spaces Only","lineBreaksOnly":"Line Breaks Only","removeBtn":"Remove Whitespace"},"guide":{"title":"How to Use","items":["Enter text with extra spaces.","Select a mode (All spaces, Extra spaces, Trim).","Get cleaned text."]},"knowledge":{"title":"About Whitespace","items":[{"title":"Whitespace Characters","content":"Invisible characters like space, tab, and newline that affect formatting."}],"featuresTitle":"Features","features":["Multiple modes","One-click clean","Preserves line breaks (optional)"],"applicationsTitle":"Applications","applications":["Minifying code","Data cleaning","Formatting text"]}},"trimLines":{"title":"Trim Lines | Remove Leading/Trailing Spaces","description":"Online line trimmer. Remove whitespace from the beginning and end of every line in your text while preserving indentation if needed.","ui":{"trimBoth":"Trim Both Ends","trimStart":"Trim Start","trimEnd":"Trim End","trimBtn":"Trim Lines"},"guide":{"title":"How to Use","items":["Paste multi-line text.","The tool trims start/end spaces of each line.","Copy the result."]},"knowledge":{"title":"About Trimming","items":[{"title":"Trim Operation","content":"Removing whitespace from the ends of a string. Essential for parsing configuration files or code."}],"featuresTitle":"Features","features":["Line-by-line processing","Smart trimming","Fast and efficient"],"applicationsTitle":"Applications","applications":["Code formatting","Config cleanup","Log analysis"]}},"shuffleLines":{"title":"Random Line Shuffler | Text Randomizer","description":"Online line shuffler. Randomize the order of lines in a list or text document. Perfect for raffles, randomized testing, and data sampling.","ui":{"shuffleBtn":"Shuffle Lines"},"guide":{"title":"How to Use","items":["Input a list of items.","Click 'Shuffle'.","Get a randomized list."]},"knowledge":{"title":"About Shuffling","items":[{"title":"Randomization","content":"Uses algorithms like Fisher-Yates to ensure every permutation is equally likely."}],"featuresTitle":"Features","features":["True randomness","Preserves content","Easy to use"],"applicationsTitle":"Applications","applications":["Raffles","Random grouping","Test data generation","Flashcards"]}},"joinLines":{"title":"Join Lines | Text Merger","description":"Online tool to join multiple lines into one. Merge text with custom delimiters like commas, spaces, or symbols.","ui":{"delimiter":"Delimiter","joinBtn":"Join Lines"},"guide":{"title":"How to Use","items":["Input multi-line text.","Set delimiter (comma, space, etc.).","Get single-line output."]},"knowledge":{"title":"About Joining","items":[{"title":"Usage","content":"Converting vertical lists to horizontal strings, often for SQL 'IN' clauses or CSVs."}],"featuresTitle":"Features","features":["Custom delimiter","Remove empty lines","Instant merge"],"applicationsTitle":"Applications","applications":["SQL query building","CSV creation","JSON array generation"]}},"splitText":{"title":"Split Text | Text Divider","description":"Online text splitter. Split a long text string into multiple lines based on a custom delimiter or regular expression.","ui":{"delimiter":"Delimiter","splitBtn":"Split Text"},"guide":{"title":"How to Use","items":["Input text with delimiters.","Specify the delimiter (e.g., comma).","Get text split into lines."]},"knowledge":{"title":"About Splitting","items":[{"title":"Delimiter","content":"A character or sequence that marks the boundary between plain text data chunks."}],"featuresTitle":"Features","features":["Custom delimiter","Regex support","Line breaking"],"applicationsTitle":"Applications","applications":["Parsing CSV","Log splitting","Field extraction"]}},"removeDuplicates":{"title":"Remove Duplicate Lines","description":"Remove duplicate lines from text online. Support case sensitivity and whitespace trimming.","guide":{"title":"How to use Remove Duplicates","items":["Enter your list of text in the input box.","Select options: 'Ignore Case' to treat 'Apple' and 'apple' as same, 'Trim Whitespace' to ignore leading/trailing spaces.","Click 'Remove Duplicates'.","The unique list appears in the output box."]},"knowledge":{"title":"About Deduplication","items":[{"title":"What is Deduplication?","content":"The process of eliminating duplicate copies of repeating data."},{"title":"Case Sensitivity","content":"Determines if uppercase and lowercase letters are treated as distinct (e.g., 'A' vs 'a')."}],"featuresTitle":"Features","features":["Remove duplicate lines","Optional case sensitivity","Optional whitespace trimming","Preserves order"],"applicationsTitle":"Applications","applications":["Email list cleaning","Data preparation","Inventory management","Code cleanup"]},"ui":{"ignoreCase":"Ignore Case","trimWhitespace":"Trim Whitespace","removeDuplicatesBtn":"Remove Duplicates"}},"reverseString":{"title":"Reverse String","description":"Reverse text or words online. Simple text reversal tool.","guide":{"title":"How to use Reverse String","items":["Enter the text you want to reverse in the input box.","Click 'Reverse Text' to reverse the entire string (e.g. 'abc' -> 'cba').","Click 'Reverse Words' to reverse the order of words (e.g. 'one two' -> 'two one').","Reversed text appears in the output box.","Use 'Copy' to grab the result."]},"knowledge":{"title":"About String Reversal","items":[{"title":"String Reversal","content":"Reversing the sequence of characters in a string. 'hello' becomes 'olleh'."},{"title":"Word Reversal","content":"Keeping the characters within words intact but reversing the order of the words themselves."}],"featuresTitle":"Features","features":["Instant character reversal","Word order reversal","Preserves spaces and special chars","Handles large text"],"applicationsTitle":"Applications","applications":["Data obfuscation","Puzzle solving","Software testing","Creative writing"]},"ui":{"reverseText":"Reverse Text","reverseWords":"Reverse Words"}},"sortLines":{"title":"Sort Lines","description":"Sort text lines alphabetically or numerically. Ascending, descending, and case-insensitive options.","guide":{"title":"How to use Sort Lines","items":["Enter multiple lines of text in the input.","Choose sort order: Ascending (A-Z) or Descending (Z-A).","Optionally enable 'Ignore Case' to treat upper/lower case as equal.","Enable 'Numeric Sort' if lines start with numbers.","Click 'Sort' to see results."]},"knowledge":{"title":"About Sorting","items":[{"title":"Alphabetical Sort","content":"Ordering lines based on the alphabetical order of characters."},{"title":"Numeric Sort","content":"Ordering lines by numerical value, treating '10' as greater than '2'."}],"featuresTitle":"Features","features":["Ascending & Descending","Case-insensitive option","Numeric sort option","Preserves line content"],"applicationsTitle":"Applications","applications":["Data organization","List ordering","Log analysis","Roster sorting"]},"ui":{"order":"Order","ascending":"Ascending (A-Z)","descending":"Descending (Z-A)","ignoreCase":"Ignore Case","numericSort":"Numeric Sort","sortBtn":"Sort"}},"removeEmptyLines":{"title":"Remove Empty Lines","description":"Remove empty and blank lines from text. Clean up your content.","guide":{"title":"How to use Remove Empty Lines","items":["Paste text with empty lines into the input.","Optionally enable 'Trim Lines' to remove lines containing only whitespace.","Click 'Remove Empty Lines'.","Copy the cleaned text from the output."]},"knowledge":{"title":"About Empty Lines","items":[{"title":"Empty Line","content":"A line containing absolutely no characters."},{"title":"Blank Line","content":"A line containing only whitespace characters like spaces or tabs."}],"featuresTitle":"Features","features":["Remove fully empty lines","Optional whitespace-only line removal","Preserves content","Fast processing"],"applicationsTitle":"Applications","applications":["Code cleanup","Document formatting","Data cleaning","Log processing"]},"ui":{"trimLines":"Also remove lines with only whitespace","removeBtn":"Remove Empty Lines"}},"loremIpsum":{"title":"Lorem Ipsum Generator","description":"Generate Lorem Ipsum placeholder text. Create paragraphs, sentences, or words.","guide":{"title":"How to use Lorem Ipsum Generator","items":["Select the type of content: Paragraphs, Sentences, or Words.","Enter the quantity to generate.","Optionally check 'Start with Lorem ipsum' for the classic opening.","Click 'Generate'.","Copy the text for your project."]},"knowledge":{"title":"About Lorem Ipsum","items":[{"title":"What is it?","content":"Lorem Ipsum is dummy text used in the printing and typesetting industry since the 1500s."},{"title":"Why use it?","content":"It allows designers to focus on visual elements without being distracted by meaningful content."}],"featuresTitle":"Features","features":["Generate paragraphs, sentences, words","Customizable quantity","Classic start option","Randomized content"],"applicationsTitle":"Applications","applications":["Web design mockups","Print layouts","UI prototyping","Document templates"]},"ui":{"type":"Type","paragraphs":"Paragraphs","sentences":"Sentences","words":"Words","count":"Quantity","startWithLorem":"Start with 'Lorem ipsum'","generateBtn":"Generate"}},"slugGenerator":{"title":"Slug Generator","description":"Generate SEO-friendly URL slugs. Convert text to clean, readable URLs.","guide":{"title":"How to use Slug Generator","items":["Enter your title or text.","Choose your preferred separator (hyphen, underscore, or dot).","Select 'Lowercase' to force all characters to lowercase (recommended for URLs).","Copy the generated slug instantly."]},"knowledge":{"title":"About URL Slugs","items":[{"title":"What is a Slug?","content":"The part of a URL that identifies a particular page in a human-readable format."},{"title":"SEO Importance","content":"Clean slugs help search engines understand page content and improve user experience."}],"featuresTitle":"Features","features":["Instant conversion","Custom separators","Special char removal","Auto lowercase"],"applicationsTitle":"Applications","applications":["Blog post URLs","Product page links","File naming","Database keys"]},"ui":{"separator":"Separator","hyphen":"Hyphen (-)","underscore":"Underscore (_)","dot":"Dot (.)","lowercase":"Lowercase"}},"numberLines":{"title":"Number Lines","description":"Add line numbers to text. Customize start number and separator.","guide":{"title":"How to use Number Lines","items":["Paste your text.","Set the 'Start Number' (default is 1).","Customize the 'Separator' (e.g. '. ' or ': ').","Click 'Add Line Numbers'.","Copy the numbered text."]},"knowledge":{"title":"About numbering","items":[{"title":"Usage","content":"Often used for code presentation, legal documents, and referencing."},{"title":"Format","content":"Usually consists of a digit followed by a separator and then the line content."}],"featuresTitle":"Features","features":["Custom start number","Custom separator","Handles large text","Preserves formatting"],"applicationsTitle":"Applications","applications":["Code sharing","Script review","Legal document formatting","List creation"]},"ui":{"startNumber":"Start Number","separator":"Separator","numberBtn":"Add Line Numbers"}},"reverseLines":{"title":"Reverse Line Order","description":"Reverse the order of lines in text. Flip lists or documents upside down.","guide":{"title":"How to use Reverse Lines","items":["Input multi-line text.","Click 'Reverse Lines'.","The last line becomes the first, and so on.","Copy the result."]},"knowledge":{"title":"About Line Reversal","items":[{"title":"Line Reversal","content":"Changing the vertical order of lines without altering the content within each line."},{"title":"vs String Reverse","content":"Unlike string reverse, this keeps words and sentences readable, only changing their sequence."}],"featuresTitle":"Features","features":["Maintains line integrity","Instant processing","Simple one-click","Handles empty lines"],"applicationsTitle":"Applications","applications":["Reordering lists","Log analysis (newest first)","Chat history reversal","Data processing"]},"ui":{"reverseBtn":"Reverse Lines"}},"extractEmails":{"shortTitle":"Extract Emails","title":"Extract Emails Online | Email Scraper","description":"Extract all email addresses from a block of text automatically.","metadata":{"keywords":["extract emails","email scraper","find emails","email extractor"],"openGraph":{"title":"Extract Emails Online - Email Finder","description":"Find and extract all email addresses from any text content."}},"ui":{"extractBtn":"Extract Emails","foundCount":"Found {count} unique emails"},"guide":{"title":"How to Use","items":["Paste text containing email addresses.","Click 'Extract Emails'.","Get a clean list of unique email addresses found."]},"knowledge":{"title":"Email Extraction","items":[{"title":"Pattern Matching","content":"Uses regular expressions to identify standard email formats within unstructured text."}]}},"textToNato":{"title":"Text to NATO Phonetic Alphabet","description":"Convert text to NATO spelling.","ui":{"convertBtn":"Convert to NATO"},"guide":{"title":"How to Use","items":["Enter text.","Get phonetic spelling."]},"knowledge":{"title":"NATO Alphabet","items":[{"title":"Usage","content":"Used in aviation and military for clarity."}]}},"regexTester":{"title":"Regex Tester","description":"Test your regular expressions.","ui":{"testBtn":"Test Regex","pattern":"Pattern","flags":"Flags","testString":"Test String"},"guide":{"title":"How to Use","items":["Enter regex pattern.","Enter test string.","See matches."]},"knowledge":{"title":"Regex","items":[{"title":"Regular Expression","content":"Sequence of characters specifying a search pattern."}]}},"regexEscape":{"title":"Regex Escape Tool","description":"Escape special characters for regex.","ui":{"escapeBtn":"Escape Characters"},"guide":{"title":"How to Use","items":["Enter text.","Click Escape.","Copy safe string."]},"knowledge":{"title":"Escaping","items":[{"title":"Special Chars","content":"Characters like . * + ? need escaping with backslash."}]}},"markdownPreview":{"title":"Markdown Preview","description":"Write and preview Markdown.","ui":{"preview":"Preview"},"guide":{"title":"How to Use","items":["Write Markdown on left.","See HTML preview on right."]},"knowledge":{"title":"Markdown","items":[{"title":"Syntax","content":"Lightweight markup language."}]}},"binaryTextConverter":{"title":"Binary <-> Text Converter","description":"Convert between text and binary code.","convert":{"toBinary":"To Binary","toText":"To Text","swap":"Swap","inputPlaceholder":"Enter content here...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"How to Use","items":["Enter text or binary in the input box.","Click 'To Binary' to convert text to binary.","Click 'To Text' to convert binary to text.","Use 'Swap' to switch input and output."]},"knowledge":{"title":"About Binary","items":[{"title":"Binary","content":"Base-2 number system using 0 and 1."},{"title":"Encoding","content":"Characters are represented by unique binary sequences (ASCII/Unicode)."}]}},"markdownHtmlConverter":{"title":"Markdown <-> HTML Converter","description":"Convert between Markdown and HTML.","convert":{"toMarkdown":"To Markdown","toHtml":"To HTML","swap":"Swap","inputPlaceholder":"Enter HTML or Markdown here...","outputPlaceholder":"Conversion result..."},"guide":{"title":"How to Use","items":["Paste your content.","Click 'To Markdown' to convert HTML to Markdown.","Click 'To HTML' to convert Markdown to HTML.","Use 'Swap' to reverse the operation."]},"knowledge":{"title":"About Formats","items":[{"title":"Markdown","content":"Lightweight markup language."},{"title":"HTML","content":"Standard markup language for documents designed to be displayed in a web browser."}]}}}},"time":{"converter":{"title":"Time/Timestamp Converter","description":"Time stamp conversion, timezone conversion, and common time format tools","currentTimestamp":{"seconds":"Current Timestamp (seconds)","milliseconds":"Current Timestamp (milliseconds)"},"getCurrentTime":"Get Current Time","inputPlaceholder":"Enter timestamp or datetime string","invalidTime":"Invalid time format","processingError":"Error occurred during processing","timezoneConversion":"Timezone Conversion","selectTimezone":"Select Timezone","currentTime":"Current Time","formats":{"timestamp":"Unix Timestamp (seconds)","timestampMs":"Unix Timestamp (milliseconds)","iso8601":"ISO 8601","date":"Date","datetime":"Date Time","rfc2822":"RFC 2822","dayOfYear":"Day of Year","dayOfYearTemplate":"Day {day} of {total}","weekOfYear":"Week of Year","weekOfYearTemplate":"Week {week} of {total}"},"timezones":{"utc":"UTC","shanghai":"Shanghai (UTC+8)","hongKong":"Hong Kong (UTC+8)","taipei":"Taipei (UTC+8)","tokyo":"Tokyo (UTC+9)","seoul":"Seoul (UTC+9)","singapore":"Singapore (UTC+8)","bangkok":"Bangkok (UTC+7)","manila":"Manila (UTC+8)","jakarta":"Jakarta (UTC+7)","dubai":"Dubai (UTC+4)","kolkata":"Kolkata (UTC+5:30)","tehran":"Tehran (UTC+3:30)","london":"London (UTC+0/1)","paris":"Paris (UTC+1/2)","berlin":"Berlin (UTC+1/2)","madrid":"Madrid (UTC+1/2)","rome":"Rome (UTC+1/2)","moscow":"Moscow (UTC+3)","amsterdam":"Amsterdam (UTC+1/2)","stockholm":"Stockholm (UTC+1/2)","istanbul":"Istanbul (UTC+3)","newYork":"New York (UTC-4/5)","losAngeles":"Los Angeles (UTC-7/8)","chicago":"Chicago (UTC-5/6)","toronto":"Toronto (UTC-4/5)","vancouver":"Vancouver (UTC-7/8)","mexicoCity":"Mexico City (UTC-6)","saoPaulo":"Sao Paulo (UTC-3)","buenosAires":"Buenos Aires (UTC-3)","sydney":"Sydney (UTC+10/11)","melbourne":"Melbourne (UTC+10/11)","perth":"Perth (UTC+8)","auckland":"Auckland (UTC+12/13)","cairo":"Cairo (UTC+2)","johannesburg":"Johannesburg (UTC+2)","lagos":"Lagos (UTC+1)","nairobi":"Nairobi (UTC+3)"},"knowledge":{"title":"Time Conversion Knowledge","items":[{"title":"Unix Timestamp","content":"Unix timestamp represents seconds elapsed since January 1, 1970 (UTC/GMT midnight), excluding leap seconds. Common formats include seconds (10 digits) and milliseconds (13 digits)."},{"title":"ISO 8601","content":"ISO 8601 is the international standard for date and time representation, formatted as YYYY-MM-DDThh:mm:ss.sssZ. 'T' marks the start of time, 'Z' indicates UTC timezone, or +/-HH:mm for other zones."},{"title":"RFC 2822","content":"RFC 2822 is the time format specified in Internet email standards, e.g., Tue, 01 Jan 2024 12:00:00 +0800. This format is widely used in emails and RSS feeds."},{"title":"Coordinated Universal Time (UTC)","content":"UTC is the primary time standard, based on atomic clocks and Earth's rotation. It's unaffected by daylight saving time and serves as a stable time reference. GMT is practically synonymous with UTC."},{"title":"Time Zones","content":"Time zones are regions using the same time standard. They're typically expressed as UTC offsets, like UTC+8 (Beijing time). A zone's offset may vary seasonally due to daylight saving time."},{"title":"Daylight Saving Time (DST)","content":"DST involves advancing clocks by one hour during certain dates. Implementation varies by country, and some regions (like China) don't use it at all. This adds complexity to time conversions."},{"title":"Julian Date and Modified Julian Date","content":"Julian Date (JD) is used in astronomy, counting from 4713 BCE. Modified Julian Date (MJD) is a simplified version starting from November 17, 1858, equal to JD-2400000.5."},{"title":"Leap Seconds","content":"Leap seconds adjust UTC to account for irregular changes in Earth's rotation. They can be positive (23:59:60) or negative (skipping 23:59:59). The last leap second adjustment was on December 31, 2016."}]}},"satellite":{"title":"Satellite Time System Converter","enterUnixTime":"Enter UTC time (timestamp/datetime)","currentUTCTime":"Current UTC Time","currentLocalTime":"Current Local Time","gpsTime":"GPS Time","gpsWeek":"GPS Week","gpsSeconds":"Seconds of Week","enterGPSWeek":"Enter GPS week number","enterGPSSeconds":"Enter seconds of week","gpsResults":"GPS Time System Results","utcTime":"UTC Time","gpsZcount":"GPS Z-count","gpsBasicInfo":"GPS Basic Info","gpsTOW":"GPS Time of Week (TOW)","towDecimal":"TOW (Decimal)","towHMS":"TOW (HH:MM:SS)","gpsDateFormats":"GPS Date Formats","yearDoy":"Year-Day of Year","mjd":"Modified Julian Date","gpsISOFormat":"GPS ISO Format","invalidTimestamp":"Invalid time format","invalidGPSTime":"Invalid GPS time","invalidGPSSeconds":"Seconds must be between 0 and 604799","processingError":"Error occurred during processing","inputPlaceholder":"Enter Unix time, timestamp or datetime (e.g., 1704067200, 2024-01-01, 2024-01-01 12:00:00)","enterTOW":"Enter Time of Week (decimal allowed)","invalidTOW":"Invalid TOW, must be between 0 and 604800","gpsInputTitle":"GPS Time Input","gpsInputDesc":"Enter GPS week number and time-of-week seconds, or directly enter time-of-week (TOW)","bdsInputTitle":"BeiDou Time Input","bdsInputDesc":"Enter BeiDou week number and time-of-week seconds, or directly enter time-of-week (TOW)","inputModeUTC":"UTC Time Input","inputModeGPS":"GPS Time Input","inputModeBDS":"BeiDou Time Input","switchMode":"Switch Input Mode","convertToUTC":"Convert to UTC Time","convertToGPS":"Convert to GPS Time","convertToBDS":"Convert to BeiDou Time","bdsResults":"BeiDou Time System Results","bdsBasicInfo":"BeiDou Basic Info","bdsWeek":"BeiDou Week","bdsSeconds":"Seconds of Week","bdsTOW":"BeiDou Time of Week (TOW)","bdsDateFormats":"BeiDou Date Formats","bdsISOFormat":"BeiDou ISO Format","enterBDSWeek":"Enter BeiDou week number","enterBDSSeconds":"Enter seconds of week","enterBDSTOW":"Enter Time of Week (decimal allowed)","invalidBDSTime":"Invalid BeiDou time","invalidBDSSeconds":"Seconds must be between 0 and 604800","invalidBDSTOW":"Invalid Time of Week","dateTime":"Date Time","bdsTime":"BeiDou Time","utcOffset":"UTC Offset","seconds":"seconds","noOffset":"No offset (synchronized with UTC)","leapSecondsNote":"GPS time is 18 seconds ahead of UTC (as of 2024)","bdsTimeNote":"BeiDou time is synchronized with UTC","knowledge":{"title":"Satellite Time System Knowledge","items":[{"title":"GPS Time System (GPST)","content":"GPS time started from January 6, 1980 00:00:00 UTC. It's a continuous time scale that doesn't account for Earth's rotation irregularities or leap seconds. As of 2024, GPS time is 18 seconds ahead of UTC."},{"title":"BeiDou Time System (BDT)","content":"BeiDou time started from January 1, 2006 00:00:00 UTC. BDT is synchronized with UTC but doesn't include leap seconds. BDT = UTC + 0."},{"title":"GPS Week Number","content":"GPS time is expressed in weeks and seconds of week. One week = 7 days = 604800 seconds. Week numbers start from 0 and roll over every 1024 weeks. First rollover occurred on August 21, 1999 23:59:47 UTC."},{"title":"BeiDou Week Number","content":"Similar to GPS, BDS uses week numbers and seconds of week. Counting started from 2006, with 604800 seconds per week. Due to its later start date, no week number rollover has occurred yet."},{"title":"Leap Seconds","content":"Leap seconds reconcile atomic time with Earth's rotation. GPS accumulates the difference without using leap seconds, while BDS handles them through system time synchronization."},{"title":"Time Formats","content":"Both systems support multiple time formats: week+seconds, day of year, Modified Julian Date (MJD), etc. Day of year counts from day 1 of each year, range 1-366."}]}},"utcToGps":{"title":"UTC to GPS Time Converter | Unix Timestamp to GPS Week & Seconds","relatedTools":"Related Conversion Tools","fullFunction":"Full Function Converter","gpsToUtc":"GPS → UTC","utcToBds":"UTC → BeiDou","gpsVsBds":"GPS vs BeiDou","utcTimeInput":"UTC Time Input","useCurrentTime":"Use Current Time","inputPlaceholder":"Enter Unix timestamp, millisecond timestamp or datetime (e.g., 1704067200, 2024-01-01, 2024-01-01 12:00:00)","supportedFormats":"Supported Formats:","unixSeconds":"Unix timestamp (seconds): 1704067200","unixMillis":"Unix timestamp (milliseconds): 1704067200000","dateOnly":"Date: 2024-01-01","dateTime":"Date time: 2024-01-01 12:00:00","currentDisplay":"Current Display:","utcTime":"UTC","localTime":"Local","invalidTimeFormat":"Invalid time format","processingError":"Error occurred during processing","gpsConversionResult":"GPS Time Conversion Result","gpsBasicInfo":"GPS Basic Information","gpsWeek":"GPS Week","weekSeconds":"Time of Week Seconds","zCount":"Z Count","timeFormat":"Time Format","towDecimal":"TOW (Decimal)","towHMS":"TOW (HH:MM:SS)","dayOfYear":"Day of Year","scientificFormat":"Scientific Format","modifiedJulianDay":"Modified Julian Day","isoFormat":"ISO Format","leapSecondOffset":"Leap Second Offset","timeComparison":"Time Comparison","gpsTime":"GPS Time","leapSecondNote":"GPS time is {seconds} seconds ahead of UTC time (as of 2024)","usageGuide":"UTC to GPS Time Usage Guide","mainPurpose":"Main Purpose","gpsDevDevelopment":"GPS device development and testing","satelliteDataProcessing":"Satellite navigation data processing","gnssReceiverSync":"GNSS receiver time synchronization","surveyTimeUnification":"Surveying engineering time unification","aerospaceTimePlanning":"Aerospace time planning","functionFeatures":"Function Features","multiFormatSupport":"Support multiple UTC time input formats","autoLeapSecondCalc":"Automatic leap second offset calculation","weekSecondsOutput":"Provide GPS week number and time-of-week seconds","completeTimeFormat":"Include complete time format output","oneClickCopy":"One-click copy conversion results","technicalSpecs":"Technical Specifications","gpsEpoch":"GPS epoch time: January 6, 1980","noLeapSeconds":"GPS time does not consider leap seconds","weekSecondsDuration":"604800 seconds per week (7×24×3600)","zCountUnit":"Z count unit is 1.5 seconds","millisecondPrecision":"Support millisecond precision calculation","usageTips":"Usage Tips","directTimestampPaste":"Can directly paste Unix timestamp","autoDateTimeRecognition":"Support automatic datetime recognition","directGpsUse":"Results can be directly used for GPS devices","batchProcessing":"Suitable for batch data processing","mobileFriendly":"Mobile-friendly operation","secondsUnit":"seconds"},"calculator":{"title":"Time Calculator","dateInterval":{"title":"Date Interval Calculator","startDate":"Start Date","endDate":"End Date","includeEndDate":"Include End Date","excludeEndDate":"Exclude End Date","totalDays":"Total Days","workDays":"Working Days","weeks":"Weeks","detail":"Total {total} days ({years} years {months} months {days} days)","yearPart":"{years} years","monthPart":"{months} months","dayPart":"{days} days","sameDay":"Same Day","totalDaysPart":"(Total {total} days)","noDateSelected":"Please select start and end dates"},"timeArithmetic":{"title":"Time Arithmetic","baseDate":"Base Date","useCurrentTime":"Use Current Time","units":{"year":"Years","month":"Months","week":"Weeks","day":"Days","hour":"Hours","minute":"Minutes","second":"Seconds"},"result":"Result","resultDateTime":"Date Time","resultTimestamp":"Timestamp"},"knowledge":{"title":"Instructions and Related Knowledge","dateInterval":{"title":"Date Interval Calculation","point1":"Calculate intervals between two dates, including years, months, days, weeks, and working days","point2":"Option to include or exclude end date, affecting the final calculation","point3":"Working days calculation excludes Saturdays and Sundays by default","point4":"Detailed results show specific distribution of years, months, and days"},"timeArithmetic":{"title":"Time Arithmetic","point1":"Supports addition and subtraction of date/time including years, months, weeks, days, hours, minutes, seconds","point2":"Negative numbers can be used for backward time calculation","point3":"Month calculations automatically handle differences in days between months","point4":"Supports viewing results in timestamp format"}}},"batch":{"title":"Batch Time Format Processing","description":"Batch time format conversion and data import/export tool","input":{"title":"Input Data","format":"Input Format","direct":"Direct Input","directHint":"Enter or paste multiple lines of time data below","file":"File Upload","fileInfo":"File: {name} (Total: {total} rows, Preview: {preview} rows)","preview":"Preview file: {name}","more":"{count} more rows not shown","placeholder":"Enter one time per line\nExample:\n1699686684\n2023-11-11 12:34:56\n2023-11-11T12:34:56Z"},"output":{"title":"Conversion Result","format":"Output Format","copy":"Copy Result"},"formats":{"timestamp":"Timestamp (seconds)","timestampMs":"Timestamp (milliseconds)","datetime":"DateTime (YYYY-MM-DD HH:mm:ss)","date":"Date (YYYY-MM-DD)","iso8601":"ISO8601 Format"},"convert":{"start":"Start Convert","clear":"Clear"},"errors":{"noInput":"Please enter time data to convert","invalidInput":"Invalid format","conversionFailed":"Conversion failed","copyFailed":"Copy failed"},"success":{"converted":"Successfully converted {count} items","cleared":"Data cleared","copied":"Copied to clipboard"},"timeCalc":{"enable":"Enable Time Calculation","add":"Add","subtract":"Subtract","units":{"years":"Years","months":"Months","days":"Days","hours":"Hours","minutes":"Minutes","seconds":"Seconds"}},"upload":{"button":"Upload File","hint":"Supports text files, CSV, Excel files (.txt, .csv, .xlsx, .xls)","success":"File {name} uploaded successfully, total {total} rows","error":"File processing failed"},"export":{"button":"Export File","success":"File exported successfully","error":"File export failed","noData":"No data to export"},"knowledge":{"title":"Instructions","basic":{"title":"Basic Features","point1":"Supports conversion between various time formats, including timestamps and datetime","point2":"Input directly in the text box or import files in batch","point3":"Conversion results can be copied or exported to files"},"file":{"title":"File Processing","point1":"Supports TXT, CSV, and Excel file import/export","point2":"File processing is done locally in the browser for data security","point3":"Maintains original file format and ensures time formats are not auto-converted"},"timeCalc":{"title":"Time Calculation","point1":"Perform addition or subtraction operations on converted times","point2":"Supports multiple time units: years, months, weeks, days, hours, minutes, seconds","point3":"Calculations are performed during conversion, maintaining the output format"}}},"cron":{"title":"Cron Expression Generator","cronType":{"label":"Cron Type","linux":"Linux Cron","spring":"Spring Cron","quartz":"Quartz Cron"},"fields":{"placeholder":{"specific":"Please select specific values","start":"Start value","end":"End value","interval":"Interval"},"interval":{"from":"From","every":"Every","fromMin":"Start from minimum value","fromSpecific":"Start from specific value"},"second":{"label":"Second","unit":"second","every":"Every second","specific":"Specific seconds","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Second {value}","specificMultiple":"Seconds {values}","range":"From second {start} to {end}","everyInterval":"Every {n} seconds","fromInterval":"Starting from second {start}, every {n} seconds"},"minute":{"label":"Minute","unit":"minute","every":"Every minute","specific":"Specific minutes","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Minute {value}","specificMultiple":"Minutes {values}","range":"From minute {start} to {end}","everyInterval":"Every {n} minutes","fromInterval":"Starting from minute {start}, every {n} minutes"},"hour":{"label":"Hour","unit":"hour","every":"Every hour","specific":"Specific hours","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Hour {value}","specificMultiple":"Hours {values}","range":"From hour {start} to {end}","everyInterval":"Every {n} hours","fromInterval":"Starting from hour {start}, every {n} hours"},"day":{"label":"Day","unit":"day","every":"Every day","specific":"Specific days","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Day {value}","specificMultiple":"Days {values}","range":"From day {start} to {end}","everyInterval":"Every {n} days","fromInterval":"Starting from day {start}, every {n} days","last":"Last day of the month (L)","weekday":"Nearest weekday (W)","lastDay":"Will execute on the last day of the month","workday":"Nearest workday","workdayDescription":"Select a date, the expression will trigger on the nearest weekday (Monday to Friday)","nearestWorkday":"Specific date","workdayRange":"(1-31)"},"month":{"label":"Month","unit":"month","every":"Every month","specific":"Specific months","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Month {value}","specificMultiple":"Months {values}","range":"From month {start} to {end}","everyInterval":"Every {n} months","fromInterval":"Starting from month {start}, every {n} months","values":{"1":"January","2":"February","3":"March","4":"April","5":"May","6":"June","7":"July","8":"August","9":"September","10":"October","11":"November","12":"December"}},"week":{"label":"Week","unit":"week","every":"Every week","specific":"Specific weeks","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"{value}","specificMultiple":"{values}","range":"From {start} to {end}","everyInterval":"Every {n} weeks","fromInterval":"Starting from {start}, every {n} weeks","values":{"0":"Sunday","1":"Monday","2":"Tuesday","3":"Wednesday","4":"Thursday","5":"Friday","6":"Saturday","7":"Sunday"},"last":"Last weekday of the month (L)","lastWeekday":"Select weekday","nth":"The","nthWeekday":"th weekday","nthDescription":"Select the nth weekday of the month"},"year":{"label":"Year","unit":"year","every":"Every year","specific":"Specific years","cycle":"Cycle","interval":"Interval","noSpecific":"Not specified (?)","specificSingle":"Year {value}","specificMultiple":"Years {values}","range":"From year {start} to {end}","everyInterval":"Every {n} years","fromInterval":"Starting from year {start}, every {n} years"}},"validation":{"invalidValue":"{field} value must be between {min} and {max}","invalidValues":"{field} contains invalid values: {values}","endGreaterThanStart":"End value must be greater than start value","intervalGreaterThanZero":"Interval value must be greater than 0","dayOfMonthInvalid":"This date does not exist in the month","invalidWeekDay":"Invalid weekday value","weekDayLinux":"In Linux Cron, weekday can only use 0-6 (0 represents Sunday)","weekDaySpringQuartz":"In Spring/Quartz Cron, it's recommended to use 1-7 (7 represents Sunday) instead of 0-6","yearIntervalPositive":"Year interval must be greater than 0","invalidNthDay":"Can only select the 1st to 5th weekday","dayWeekBothNoSpecific":"Day and weekday fields cannot both use ?"},"preview":{"expression":"Expression","meaning":"Meaning","nextExecutions":"Preview","noPreview":"Unable to preview execution times","invalidExpression":"Invalid expression","parseError":"Parse error"},"templates":{"title":"Common Templates","items":{"every5Minutes":"Execute every 5 minutes","everyDayAt5":"Execute at 5:00 every day","everySaturdayAt1":"Execute at 1:00 AM every Saturday","workdaysAt1015":"Trigger at 10:15 AM Monday through Friday","everyMinuteAt10":"Trigger every minute between 10:00 AM and 10:59 AM","threeTimes":"Execute at 10:00 AM, 2:00 PM, and 4:00 PM daily","workingHours":"Every half hour during working hours (9 AM to 5 PM)","15thAt1015":"Trigger at 10:15 AM on the 15th of every month","everyDayAt23":"Execute once at 23:00 every day"}},"instructions":{"title":"Instructions","description":"The Cron Expression Generator helps you create execution schedules for scheduled tasks.","steps":["Select Cron type (Linux, Spring, or Quartz)","Set values for each time field","View the generated expression and preview","Use common templates to quickly generate expressions"]},"algorithms":{"Linux Cron":"Standard Linux Cron expression with five fields: minute, hour, day, month, and weekday","Spring Cron":"Spring framework Cron expression with an additional seconds field, total six fields","Quartz Cron":"Quartz scheduler Cron expression with year field support, total seven fields"},"otherAlgorithms":"Other Cron Types","knowledge":{"title":"Cron Expression Explained","basics":{"title":"Basic Format","description":"A Cron expression is a string consisting of 5-7 fields separated by spaces.","table":{"headers":["Field","Description","Required","Allowed Values","Examples"],"rows":[{"field":"Second","description":"Second within a minute","required":"Spring/Quartz","range":"0-59","examples":"0, 30, */5"},{"field":"Minute","description":"Minute within an hour","required":"Yes","range":"0-59","examples":"0, 15, */15"},{"field":"Hour","description":"Hour within a day","required":"Yes","range":"0-23","examples":"0, 12, */2"},{"field":"Day","description":"Day within a month","required":"Yes","range":"1-31","examples":"1, 15, L"},{"field":"Month","description":"Month within a year","required":"Yes","range":"1-12","examples":"1, 6, *"},{"field":"Week","description":"Day of week","required":"Yes","range":"0-7","examples":"1, MON, *"},{"field":"Year","description":"Specific year","required":"Optional in Quartz","range":"1970-2099","examples":"2024, *"}]}},"specialChars":{"title":"Special Characters","table":{"headers":["Character","Description","Example"],"rows":[{"char":"*","description":"Represents all possible values","example":"In the hour field, * means every hour"},{"char":",","description":"Used to list multiple values","example":"In the minute field, 1,15,30 means minutes 1, 15, and 30"},{"char":"-","description":"Represents a range","example":"In the hour field, 9-17 means from 9 AM to 5 PM"},{"char":"/","description":"Represents increment values","example":"In the minute field, 0/15 means every 15 minutes"},{"char":"L","description":"In the day field, means the last day of the month; in the week field, means 7 or SAT","example":"In the day field, L means the last day"},{"char":"W","description":"Represents the nearest workday","example":"15W means the nearest workday to the 15th"},{"char":"#","description":"Used to specify the nth weekday of the month","example":"6#3 means the third Friday"},{"char":"?","description":"Can only be used in 'Day' and 'Week' fields. Since 'Day' and 'Week' affect each other, when one is specified, the other must use '?' as a placeholder. For example, when specifying execution on the 15th of each month, the 'Week' field must use '?'; when specifying execution every Monday, the 'Day' field must use '?'","example":"0 0 12 15 * ? means execute at 12:00 on the 15th of each month; 0 0 12 ? * MON means execute at 12:00 every Monday"}]}},"differences":{"title":"Differences Between Types","items":[{"type":"Linux Cron","description":"The most basic Cron expression format, containing 5 fields.","features":["Does not support second-level scheduling","Week field uses 0-6 to represent Sunday to Saturday","Does not support year field","Supports basic special characters: *, /, -"]},{"type":"Spring Cron","description":"A simplified version based on Quartz, containing 6 fields.","features":["Supports second-level scheduling","Week field can use 1-7 or SUN-SAT","Does not support year field","Supports special characters like L, W, #"]},{"type":"Quartz Cron","description":"The most complete version, containing 7 fields.","features":["Supports second-level scheduling","Supports year field","Week field can use 1-7 or SUN-SAT","Supports all special characters: L, W, #, ?"]}]},"notes":{"title":"Important Notes","items":["When both day and week fields are specified, note that they have an 'OR' relationship","When using special characters, be aware of compatibility between different Cron types","When setting specific times, it's recommended to set unused fields to *","When using ranges, ensure the start value is less than the end value","When using steps, ensure they don't exceed the field's valid range","Month and weekday value ranges may differ between different types","It's recommended to thoroughly test in important production environments"]}},"guide":{"title":"GCM Mode Guide","description":"When decrypting external GCM encrypted data, you need all of the following information:","authTagMode":{"title":"Authentication Tag Processing Mode","auto":"Authentication tag is appended to ciphertext, suitable when interoperating with Java APIs where tag is included at the end of ciphertext"},"steps":{"title":"Information required for decryption","key":"Key: The original key used for encryption","nonce":"Nonce: The original 12-byte random value used for encryption","authTag":"Authentication Tag: The 16-byte tag generated during encryption, correct tag must be provided to decrypt","aad":"Additional Authenticated Data (optional): If AAD was used in encryption, the same value must be provided","ciphertext":"Ciphertext: The encrypted data to decrypt"}}},"julianDate":{"shortTitle":"Julian Date","description":"Convert between Julian Date (JD, MJD) and local dates"},"excelDate":{"shortTitle":"Excel Date","description":"Convert Excel serial dates to standard dates"},"windowsFiletime":{"shortTitle":"Windows FILETIME","description":"Convert Windows FILETIME (1601 epoch) to dates"},"ntpTimestamp":{"shortTitle":"NTP Timestamp","description":"Convert NTP timestamps (1900 epoch) to dates"},"leapYearChecker":{"shortTitle":"Leap Year Checker","description":"Check if a specific year is a leap year"},"ageCalculator":{"shortTitle":"Age Calculator","description":"Calculate exact age in years, months, and days"}},"tint-shade":{"title":"Tint & Shade Generator","description":"Generate a series of lighter tints and darker shades from a base color.","baseColor":"Base Color","tints":"Tints","shades":"Shades","steps":"Steps","guide":{"title":"Usage Guide","items":["Select a base color.","Tints are generated by mixing the base color with white.","Shades are generated by mixing the base color with black.","Click on any color box to quickly copy its code."]},"knowledge":{"title":"Tints vs. Shades","items":[{"title":"Tints","content":"Adding white to a pure color to increase its lightness."},{"title":"Shades","content":"Adding black to a pure color to decrease its lightness."}]}},"toast":{"error":"Error","success":"Success","warning":"Warning","info":"Info"},"triangleCalculator":{"title":"Triangle Calculator","description":"Calculate area and perimeter of a triangle given base and height, or three sides.","keywords":"triangle calculator, area of triangle, perimeter of triangle, heron's formula","category":"Math","mode":"Calculation Mode","modeBaseHeight":"Base & Height","modeSides":"Three Sides (SSS)","base":"Base (b)","height":"Height (h)","sideA":"Side A","sideB":"Side B","sideC":"Side C","calculate":"Calculate","result":"Results","area":"Area","perimeter":"Perimeter","clear":"Clear","guide":{"title":"How to Use","items":["Select the calculation mode.","Enter the required values.","Click 'Calculate' to see Area and Perimeter."]},"knowledge":{"title":"About Triangles","introduction":"A triangle is a polygon with three edges and three vertices.","items":[{"title":"Formulas","content":"Area = 0.5 * base * height\nPerimeter = a + b + c\nHeron's Formula: Area = √(s(s-a)(s-b)(s-c)), where s is semi-perimeter"}],"featuresTitle":"Features","features":["Support for different input methods","Heron's formula implementation"],"applicationsTitle":"Applications","applications":["Geometry","Construction","Surveying"]}},"twofish":{"title":"Twofish Encryption/Decryption Tool","config":{"title":"Configuration","keyLength":{"title":"Key Length"},"key":{"title":"Key","placeholder":{"text":"Enter key text","hex":"16/24/32 bytes hex"},"generate":"Generate Random Key","error":"Invalid key length"},"mode":{"title":"Operation Mode","ecb":"ECB - Electronic Codebook","cbc":"CBC - Cipher Block Chaining","cfb":"CFB - Cipher Feedback","ofb":"OFB - Output Feedback","ctr":"CTR - Counter","gcm":"GCM - Galois/Counter Mode"},"padding":{"title":"Padding Mode","pkcs7":"PKCS#7 Padding","iso97971":"ISO/IEC 9797-1 Padding","ansix923":"ANSI X.923 Padding","iso10126":"ISO 10126 Padding","zeropadding":"Zero Padding","nopadding":"No Padding"},"iv":{"title":"Initialization Vector (IV)","placeholder":{"text":"Enter 16 bytes IV text","hex":"Enter 32 digits hex IV"},"generate":"Generate Random IV","error":"Invalid IV length","positionTitle":"IV Position","positionDesc":"Choose how IV is handled with ciphertext","position":{"manual":"Manual - Provide IV separately","header":"Header - Automatically prepend/extract IV at beginning","footer":"Footer - Automatically append/extract IV at end"}}},"crypto":{"title":"Encryption/Decryption","plainFormat":"Plaintext Format","cipherFormat":"Ciphertext Format","plainPlaceholder":{"utf8":"Enter UTF-8 text","hex":"Enter hex text","base64":"Enter Base64 text"},"cipherPlaceholder":{"hex":"Enter hex ciphertext","base64":"Enter Base64 ciphertext"},"encryptButton":"Encrypt","decryptButton":"Decrypt","error":{"noKey":"Please enter key","noIv":"Please enter IV","noInput":"Please enter data to process","invalidFormat":"Invalid input format","process":"Processing error occurred","gcmDecryptFailed":"GCM decryption failed, possibly due to incorrect key, nonce, auth tag or AAD","gcmEncryptFailed":"GCM encryption failed, possibly due to incorrect key, nonce, auth tag or AAD","base64DecodeError":"Base64 decoding error","hexDecodeError":"Hexadecimal decoding error","emptyText":"Decryption result is empty","nonceExtract":"Failed to extract Nonce from ciphertext","ivExtract":"Failed to extract IV from ciphertext","ivMissing":"Missing IV parameter","ctrNeedsIv":"CTR mode requires an IV value"},"warning":{"noPaddingLength":"No padding mode requires data length to be a multiple of 16 bytes, zero padding will be automatically added"}},"knowledge":{"title":"Twofish Knowledge","sections":[]}},"txtLookup":{"title":"TXT Record Lookup","description":"Find TXT records for a domain, often used for verification and email security (SPF, DMARC).","inputLabel":"Domain Name","inputPlaceholder":"example.com","buttonLabel":"Lookup TXT Records","resultLabel":"TXT Records","errorLabel":"Error","noRecords":"No TXT records found.","copy":"Copy","copied":"Copied"},"ulidGenerator":{"title":"ULID Generator","description":"Generate Universally Unique Lexicographically Sortable Identifiers.","configuration":"Configuration","count":"Count","timestamp":"Timestamp (Optional)","currentTimestampPlaceholder":"Leave empty for current time","options":"Options","uppercase":"Uppercase","generate":"Generate ULIDs","generatedUlids":"Generated ULIDs","firstUlidTime":"First ULID Timestamp","ulidSortableNote":"ULIDs are sortable by generation time","copy":"Copy","copied":"Copied!","guide":{"title":"How to use","items":["Adjust the number of ULIDs to generate.","Optionally select a specific timestamp to generate ULIDs for that time.","Toggle Uppercase option (standard ULID is uppercase).","Click 'Generate ULIDs' to create identifiers.","Copy the result to your clipboard."]},"knowledge":{"title":"About ULID","introduction":"ULID (Universally Unique Lexicographically Sortable Identifier) is designed to be a better UUID.","items":[{"title":"Sortable","content":"The leading characters are encoded from a timestamp, so ULIDs generated later sort after those generated earlier."},{"title":"URL Safe","content":"Uses Crockford's Base32 alphabet for better readability and URL safety."},{"title":"No Collisions","content":"Includes 80 bits of randomness to ensure uniqueness even within the same millisecond."}]}},"unicodeEncoder":{"convert":{"title":"Unicode Encode/Decode","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","inputPlaceholder":"Enter text to convert...","outputPlaceholder":"Result will be displayed here...","encodeFormat":"Encoding Format","formats":{"escape":"JavaScript Escape (\\uXXXX)","codepoint":"Code Point (U+XXXX)","html":"HTML Entity (&#xXXXX;)"}},"guide":{"title":"Instructions","items":["Enter text to convert to Unicode escape sequences or code points","Choose desired output format (JS Escape, Code Point, HTML Entity)","Use Decode to convert Unicode sequences back to text"]},"knowledge":{"title":"Unicode Knowledge","items":[{"title":"What is Unicode?","content":"Unicode is a universal character encoding standard that assigns a unique number to every character across languages and scripts."},{"title":"UTF-8 vs Unicode","content":"Unicode is the character set (mapping characters to numbers), while UTF-8 is an encoding (how those numbers are stored in bytes)."}],"featuresTitle":"Key Features","features":["Supports over 140,000 characters","Universal standard for text representation","Essential for internationalization"],"applicationsTitle":"Common Applications","applications":["Software localization","Cross-platform text exchange","Emoji support","Mathematical and scientific symbols"]}},"urlBuilder":{"title":"URL Builder","description":"Construct URLs by adding protocol, host, path, and query parameters.","inputs":{"protocol":"Protocol","host":"Host / Domain","path":"Path","params":"Query Parameters"},"params":{"key":"Key","value":"Value","add":"Add Parameter","remove":"Remove"},"results":{"title":"Built URL","copy":"Copy URL"},"guide":{"title":"How to use URL Builder","items":["Select the protocol (http or https).","Enter the host (e.g., example.com) and path (e.g., /api/data).","Add key-value pairs for query parameters.","The complete URL is automatically generated and can be copied."]},"knowledge":{"title":"URL Encoding","items":[{"title":"Percent-Encoding","content":"Special characters in URLs must be encoded. For example, a space becomes %20."},{"title":"Query Parameters","content":"Parameters are separated from the base URL by a question mark (?) and from each other by ampersands (&)."}],"featuresTitle":"Features","features":["Automatic URL encoding","Dynamic parameter management","Real-time preview"],"applicationsTitle":"Applications","applications":["API testing","Marketing link generation","Sharing deep links"]}},"urlEncoder":{"title":"URL Encoder / Decoder","description":"Professional online URL encoding and decoding tool. Supports UTF-8 character set, provides both component and URI encoding modes, and easily handles special characters and non-Latin scripts.","convert":{"title":"URL Converter","inputPlaceholder":"Enter text or URL to encode/decode...","outputPlaceholder":"Result will be shown here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","encodeMode":"Encoding Mode","encodeModes":{"component":"encodeURIComponent (Recommended for value)","uri":"encodeURI (For full URL)"}},"guide":{"title":"How to Use URL Encoder/Decoder","items":["**Select Action**: Click 'Encode' to convert special characters to percent coordinates, or 'Decode' to restore the original string.","**Understand Modes**: 'encodeURIComponent' encodes almost all non-alphanumeric characters, best for query parameter values; 'encodeURI' preserves URL syntax characters (like : / ? #), best for full URLs.","**Input Content**: Paste the text or URL you want to process in the left input box. Supports strings of any length.","**View Result**: The converted result will appear instantly in the right output box.","**Copy Result**: Click the copy button above the output box to copy the result to your clipboard.","**Swap & Clear**: Use the Swap button to quickly exchange input and output for continuous operations; use Clear to reset everything.","**Note**: When decoding, ensure the input format is correct. Invalid percent-encoding sequences (like %G0) may cause errors."]},"knowledge":{"title":"URL Encoding Deep Dive","items":[{"title":"What is URL Encoding (Percent-encoding)?","content":"URL encoding, officially known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI). Characters that are not allowed in a URL (like spaces or non-ASCII characters) must be translated into a format that can be transmitted over the Internet. It replaces unsafe ASCII characters with a '%' followed by two hexadecimal digits."},{"title":"Why is URL Encoding Necessary?","content":"URLs can only be sent over the Internet using the ASCII character-set. Since URLs often contain characters outside the ASCII set, the URL has to be converted into a valid ASCII format. URL encoding replaces unsafe ASCII characters with a '%' followed by two hexadecimal digits. For example, a space is replaced by '%20'. This ensures no ambiguity in parsing the URL."},{"title":"UTF-8 and URL Encoding","content":"Modern web standards recommend using UTF-8 as the basis for URL encoding. In UTF-8, a non-ASCII character is converted into one or more bytes. Each of these bytes is then percent-encoded. For example, the character 'É' in UTF-8 is 0xC3 0x89, so it becomes '%C3%89'. This allows URLs to support characters from virtually all human languages."},{"title":"Common Character Encodings","content":"Space → %20 (or + in some contexts); Slash / → %2F; Colon : → %3A; Question mark ? → %3F; Equals = → %3D; Ampersand & → %26; Hash # → %23. Note that letters (A-Z, a-z), numbers (0-9), and a few symbols (- _ . ! ~ * ' ( )) are unreserved and do not need to be encoded."}],"featuresTitle":"Key Features","features":["**Dual Mode Support**: Provides both component and URI encoding modes to suit different needs.","**UTF-8 Ready**: Fully supports multi-byte characters, ensuring correct encoding for Chinese, Emoji, and other non-Latin scripts.","**Instant Processing**: Powered by client-side JavaScript, conversion happens instantly without sending data to a server.","**Privacy Focused**: Your data never leaves your browser, ensuring maximum privacy and security.","**Large Text Support**: Optimized performance allows for processing very large text blocks without lag."],"applicationsTitle":"Common Applications","applications":["**Web Development**: Essential for encoding query parameters in AJAX requests to prevent malformed URLs.","**Data Scraping**: Used to properly encode search terms or parameters when building URLs for web scrapers.","**API Testing**: Critical for sending data containing special characters (like / or &) in RESTful API paths or queries.","**File Downloads**: Ensures filenames with special characters or non-English text are correctly handled by browsers.","**Debugging**: Quickly decoding opaque URL strings in browser address bars to understand their contents."]}},"urlParser":{"title":"URL Parser","description":"Parse and analyze URLs into their components (protocol, host, path, query parameters).","input":{"label":"Enter URL","placeholder":"https://example.com:8080/path/to/resource?query=param#fragment","parse":"Parse URL"},"error":"Invalid URL. Please enter a valid URL including protocol (e.g., https://).","results":{"title":"URL Components","fullUrl":"Full URL","protocol":"Protocol","username":"Username","password":"Password","host":"Host/Hostname","port":"Port","path":"Path","query":"Query String","fragment":"Fragment/Hash","paramsTitle":"Query Parameters"},"guide":{"title":"How to use URL Parser","items":["Enter a complete URL in the input field.","Click 'Parse URL' or press Enter.","View the breakdown of the URL into its standard components.","Examine individual query parameters in the detailed table."]},"knowledge":{"title":"URL Structure","items":[{"title":"Protocol (Scheme)","content":"Indicates the protocol to be used, such as http, https, ftp, or mailto."},{"title":"Host (Domain)","content":"The domain name or IP address of the server hosting the resource."},{"title":"Path","content":"The specific location of the resource on the server."},{"title":"Query String","content":"Key-value pairs containing data to be passed to web applications."}],"featuresTitle":"Features","features":["Full component breakdown","Query parameter extraction","Support for complex URLs"],"applicationsTitle":"Applications","applications":["Debugging web applications","Analyzing tracking parameters","Security analysis"]}},"userAgentParser":{"title":"User Agent Parser","description":"Parse and analyze user agent strings to identify browser, operating system, and device details.","input":"User Agent String","inputPlaceholder":"Paste User Agent string here (or use current browser's)","useMyUa":"Use My User Agent","parse":"Parse","error":"Please enter a User Agent string.","results":{"title":"Parsed Information","browser":"Browser","os":"Operating System","device":"Device","cpu":"CPU Architecture","engine":"Browser Engine"},"guide":{"title":"How to use User Agent Parser","items":["Paste a User Agent string into the input field, or click 'Use My User Agent' to check your current browser.","Click the 'Parse' button.","View detailed breakdown of the browser, OS, device, and other properties."]},"knowledge":{"title":"About User Agents","items":[{"title":"What is a User Agent?","content":"A User Agent is a string of text that a web browser sends to a web server to identify itself. It contains information about the browser version, operating system, and device type."},{"title":"Usage","content":"User Agents are used for content negotiation, analytics, and serving device-specific content. However, they can be spoofed."}],"featuresTitle":"Features","features":["Browser identification","OS detection","Device type analysis"],"applicationsTitle":"Applications","applications":["Debugging browser issues","Analytics tracking","Security analysis"]}},"utf8Encoder":{"convert":{"title":"UTF-8 Encode/Decode","input":"Input","output":"Output","clear":"Clear","inputPlaceholder":"Enter text...","outputPlaceholder":"Result will be displayed here...","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap"},"guide":{"title":"Instructions","items":["Encode: Convert text to UTF-8 hex byte sequence","Decode: Convert UTF-8 hex byte sequence back to text","Delimiters are supported (space, 0x prefix, etc.)"]},"knowledge":{"title":"UTF-8 Knowledge","items":[{"title":"What is UTF-8?","content":"UTF-8 is a variable-width character encoding used for electronic communication. It uses 1 to 4 bytes to represent standard Unicode characters."},{"title":"Features","content":"Backwards compatible with ASCII. Efficient for Latin scripts. The dominant encoding for the World Wide Web."}],"featuresTitle":"Key Features","features":["Variable width (1-4 bytes)","Self-synchronizing","No endianness issues (byte order)"],"applicationsTitle":"Common Applications","applications":["Web pages (HTML5)","Database storage","Email transfer","API responses (JSON)"]}},"uuencodeEncoder":{"convert":{"title":"UUEncode Encoder/Decoder","input":"Input","output":"Output","encodeButton":"Encode","decodeButton":"Decode","swapButton":"Swap","clear":"Clear","filename":"Filename","inputPlaceholder":"Enter text to encode/decode...","outputPlaceholder":"Result will appear here..."},"guide":{"title":"Instructions","items":["Encode text to UUEncode format","Decode UUEncode strings back to text","Output includes begin/end markers and filename"]},"knowledge":{"title":"UUEncode Knowledge","items":[{"title":"What is UUEncode?","content":"UUEncode (Unix-to-Unix Encoding) is a classic binary-to-text encoding format originally used to transfer files between Unix systems via email."},{"title":"Format Characteristics","content":"Each line begins with a length character followed by encoded data. Files start with 'begin permissions filename' and end with 'end'."}],"featuresTitle":"Key Features","features":["Includes filename and permission information","3 bytes to 4 character encoding","Maximum 45 bytes of data per line"],"applicationsTitle":"Common Applications","applications":["Legacy system file transfers","Usenet newsgroup attachments","Old mailing list attachments"]}},"uuidGenerator":{"title":"UUID Generator","description":"Generate bulk UUIDs (v1, v3, v4, v5) with customization options.","configuration":"Configuration","version":"Version","count":"Count","options":"Options","hyphens":"Hyphens","uppercase":"Uppercase","namespace":"Namespace (UUID)","name":"Name","generate":"Generate UUIDs","generatedUuids":"Generated UUIDs","copy":"Copy","copied":"Copied!","guide":{"title":"How to use","items":["Select UUID version (v4 random, v1 time-based, v3/v5 name-based).","For v3/v5, enter a Namespace UUID and a Name.","Adjust the number of UUIDs to generate.","Toggle Hyphens or Uppercase options as needed.","Click 'Generate UUIDs' to create new identifiers.","Use the Copy button to copy the list to clipboard."]},"knowledge":{"title":"About UUID","introduction":"UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems.","items":[{"title":"UUID v4 (Random)","content":"Generated using random numbers. The probability of collision is extremely low."},{"title":"UUID v1 (Time-based)","content":"Generated using the current time and MAC address. Guaranteed unique across space and time."},{"title":"UUID v3 (MD5) & v5 (SHA-1)","content":"Generated from a namespace and a name. Deterministic: same namespace + same name = same UUID."}]}},"varianceCalculator":{"title":"Variance Calculator","description":"Calculate the sample and population variance of a dataset.","inputLabel":"Enter a sequence of numbers","placeholder":"e.g., 1.5, 2.5, 3.5, 4.5","calculate":"Calculate","clear":"Clear","result":"Result","invalidInput":"Please enter a valid sequence of numbers.","sample":"Sample Variance","population":"Population Variance","guide":{"title":"How to Use","items":["Enter a sequence of numbers separated by commas, spaces, or newlines.","Click 'Calculate' to generate both sample and population variances.","The sample variance is used when your data is a sample of a larger population.","The population variance is used when your data represents the entire population."]},"knowledge":{"title":"About Variance","introduction":"Variance is the expectation of the squared deviation of a random variable from its population mean or sample mean. Variance is a measure of dispersion.","items":[{"title":"Definition","content":"It measures how far a set of numbers is spread out from their average value. It is the square of the standard deviation."},{"title":"Sample vs Population","content":"Sample Variance (s²): An estimate of the population variance. It divides the sum of squared differences by (n-1).\nPopulation Variance (σ²): The exact variance of an entire population. It divides the sum of squared differences by N."}],"featuresTitle":"Key Features","features":["Calculates both sample and population variances.","Supports floating-point numbers."],"applicationsTitle":"Applications","applications":["Statistical modeling.","Portfolio theory in finance.","Machine learning feature scaling."]}},"webpConverter":{"title":"WebP Converter","description":"Convert images to/from WebP format with quality control","uploadTitle":"Upload Image","resultTitle":"Converted Image","guide":{"title":"How to Use","items":["Upload any image file (PNG, JPG, or WebP)","For WebP input: converts to PNG output","For PNG/JPG input: converts to WebP output","Adjust quality slider for WebP compression","Click 'Convert' to process the image","Preview the result and download","WebP typically offers 25-35% smaller files than JPG"]},"knowledge":{"title":"About WebP Format","items":[{"title":"What is WebP?","content":"WebP is a modern image format developed by Google that provides superior lossless and lossy compression for images on the web. WebP images are typically 25-35% smaller than equivalent JPEG images and 26% smaller than PNG images, while maintaining comparable visual quality."},{"title":"WebP Advantages","content":"WebP supports both lossy and lossless compression, transparency (alpha channel), and animation. It offers significantly smaller file sizes compared to PNG and JPG, making it ideal for web optimization. Major browsers including Chrome, Firefox, Safari, and Edge all support WebP."},{"title":"Browser Compatibility","content":"WebP is now supported by all major modern browsers. However, some older applications and systems may not support WebP, which is why conversion to/from WebP is still useful. This tool helps you convert between WebP and universally supported formats."},{"title":"Client-Side Processing","content":"This converter processes images entirely in your browser using HTML5 Canvas API. No files are uploaded to any server, ensuring complete privacy and fast processing speeds."}],"featuresTitle":"Key Features","features":["Bidirectional conversion: to and from WebP","Adjustable quality for lossy WebP compression","Supports PNG, JPG, and WebP input formats","100% client-side processing for privacy"],"applicationsTitle":"Common Use Cases","applications":["Optimizing images for faster web page loading","Converting WebP images for use in older applications","Reducing storage costs with smaller image files","Preparing images for content delivery networks (CDNs)"]}},"weekNumber":{"title":"Week Number Calculator","description":"Find out the ISO week number for any date, or get dates for a specific week.","calculator":{"tabs":{"dateToWeek":"Date to Week","weekToDate":"Week to Date"},"inputs":{"date":"Select Date","year":"Year","week":"ISO Week Number (1-53)","currentTime":"Today"},"results":{"title":"Result","weekNumber":"ISO Week Number","year":"ISO Week-Numbering Year","weekString":"ISO Week String","totalWeeks":"Total weeks in this year","startDate":"Start of Week (Monday)","endDate":"End of Week (Sunday)","invalidWeek":"Invalid week number for the selected year.","weekOfMonth":"Week of Month","monthName":"Month"}},"knowledge":{"title":"About ISO Week Numbers","sections":[{"title":"What is an ISO Week?","content":"The ISO 8601 data elements standard specifies a week-numbering system. Weeks start on Monday. The first week of a year is the week that contains the first Thursday of the year."},{"title":"Week 1","content":"Week 1 of any year is the week containing January 4th. This means that sometimes, the first few days of January might belong to the last week (Week 52 or 53) of the previous year."},{"title":"52 or 53 Weeks?","content":"Most years have 52 weeks. A year has 53 weeks if January 1st falls on a Thursday, or if it's a leap year and January 1st falls on a Wednesday."}]}},"whois":{"title":"Whois Lookup","description":"Retrieve domain registration details, including registrar, expiry date, and contact info.","input":"Domain Name","inputPlaceholder":"Enter a domain (e.g., google.com)","lookup":"Lookup","loading":"Querying WHOIS...","error":"Failed to retrieve WHOIS data. Please check the domain and try again.","rawOutput":"Raw Output","guide":{"title":"How to use Whois Lookup","items":["Enter a domain name (e.g., example.com) in the input field.","Click the 'Lookup' button.","Review the domain registration details, creation date, expiry date, and registrar information."]},"knowledge":{"title":"About WHOIS","items":[{"title":"What is WHOIS?","content":"WHOIS is a query and response protocol that is used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name or an IP address block."},{"title":"Privacy","content":"Many domain owners use privacy protection services to redact their personal contact information from public WHOIS records."}],"featuresTitle":"Features","features":["Real-time WHOIS database query","Support for most TLDs (Top-Level Domains)","Displays raw WHOIS data for full transparency","Simple and fast interface"],"applicationsTitle":"Applications","applications":["Checking domain availability and expiry","Identifying domain registrars","Investigating domain ownership for legal or security reasons","Network administration"]}},"windowsFiletime":{"title":"Windows FILETIME Converter","description":"Convert Windows FILETIME (100-nanosecond intervals since January 1, 1601) to standard date/time and vice versa.","inputTypeSelection":"Conversion Direction","typeFiletimeToDate":"FILETIME to Date","typeDateToFiletime":"Date to FILETIME","inputFiletimeLabel":"Windows FILETIME","inputFiletimePlaceholder":"e.g., 133221980000000000","inputDateLabel":"Local Date & Time","inputDatePlaceholder":"Select date and time","formatHexTitle":"Format","formatHex":"Hexadecimal (e.g., 0x1D94C43CA9B2A80)","formatDecimal":"Decimal (e.g., 133221980000000000)","convertBtn":"Convert","resultTitle":"Conversion Result","resultFiletimeDec":"FILETIME (Decimal)","resultFiletimeHex":"FILETIME (Hex)","resultUtc":"UTC Time","resultLocal":"Local Time","copySuccess":"Copied successfully","clearForm":"Clear","now":"Current Time","aboutTitle":"About Windows FILETIME","aboutContent":"A Windows FILETIME is a 64-bit value that represents the number of 100-nanosecond intervals that have elapsed since 12:00 A.M. January 1, 1601 Coordinated Universal Time (UTC). This epoch date corresponds to the start of the 400-year Gregorian calendar cycle when the calendar was first adopted. It is commonly used in Windows APIs, Active Directory, and NTFS file systems.","errorInvalidFiletime":"Please enter a valid Windows FILETIME value","errorInvalidDate":"Please select a valid date and time","guide":{"title":"How to Use","items":["Select the conversion direction: 'FILETIME → Date' to decode a Windows FILETIME value, or 'Date → FILETIME' to get the FILETIME for a date.","For FILETIME → Date: enter the decimal FILETIME value (100-nanosecond intervals since Jan 1, 1601) and click Convert.","For Date → FILETIME: pick a date/time from the selector and click Convert.","You can enter the value in either decimal or hexadecimal format. The result shows both representations.","Click 'Current Time' to populate with the current timestamp, or 'Clear' to reset the form."]},"knowledge":{"title":"About Windows FILETIME","sections":[{"title":"What is FILETIME?","content":"Windows FILETIME is a 64-bit integer representing the number of 100-nanosecond intervals since January 1, 1601 00:00:00 UTC. It is used throughout the Windows API for file timestamps (creation, modification, access time) and many other system operations."},{"title":"Common Uses","content":"FILETIME values appear in Windows registry entries, NTFS file metadata, event logs, and Windows API calls like GetSystemTimeAsFileTime(). When debugging Windows applications or analyzing forensic artifacts, converting these values to human-readable dates is essential."},{"title":"Comparison with Unix Time","content":"Unix timestamps count seconds from January 1, 1970. To convert FILETIME to Unix time: subtract 116444736000000000 (the number of 100-ns intervals between 1601 and 1970) then divide by 10,000,000. The FILETIME format offers nanosecond precision versus Unix time's second precision."}]}},"workdaysCalculator":{"title":"Business / Workday Calculator","description":"Calculate business days between two dates, or find a date by adding/subtracting workdays.","calculator":{"tabs":{"difference":"Calculate Difference (Days)","addSubtract":"Add/Subtract Workdays"},"inputs":{"startDate":"Start Date","endDate":"End Date","operation":"Operation","add":"Add Workdays","subtract":"Subtract Workdays","amount":"Number of Workdays","includeLastDay":"Include end date","holidays":"Custom Holidays (One per line, YYYY-MM-DD)","excludeWeekends":"Exclude Weekends (Sat, Sun)","buttonDiff":"Calculate Difference","buttonAdd":"Calculate New Date"},"results":{"title":"Result","totalDays":"Total Calendar Days","businessDays":"Business Days","weekendDays":"Weekend Days","holidayDays":"Holidays Excluded","formatFull":"Result Date","formatIso":"ISO 8601"},"error":{"invalidDate":"Please provide valid dates.","invalidAmount":"Please provide a valid number of workdays.","invalidHoliday":"Invalid holiday format: "}},"knowledge":{"title":"About Business Days","sections":[{"title":"What is a Business Day?","content":"A business day usually refers to any day of the week from Monday through Friday. Weekends and official public holidays are excluded."},{"title":"Adding Workdays","content":"If you add 5 workdays to a Monday, the result is the following Monday (assuming no holidays). Weekends are skipped during the calculation."},{"title":"Holidays","content":"Holidays vary by country, region, and industry. Our tool lets you type in custom holidays to be skipped so you can adapt calculations to your organization."}]}},"worldClock":{"title":"World Clock","description":"Conveniently compare current times across multiple global cities side-by-side.","addCity":"Add City","searchCity":"Search for a city or timezone...","localTime":"Your Local Time","offset":"Offset","remove":"Remove","noCitiesAdded":"No cities added yet. Click 'Add City' to start.","timeFormat":"Time Format","12hour":"12-hour","24hour":"24-hour","date":"Date","guide":{"title":"How to Use","items":["Click 'Add City' and search for a city name or timezone (e.g., 'Tokyo', 'Europe/Paris').","Select a result from the dropdown to add it to your world clock display.","Click the trash icon on any card to remove a timezone.","Toggle between 12-hour and 24-hour format using the buttons at the top.","The offset badge shows the time difference from your local time."]},"knowledge":{"title":"About Time Zones","sections":[{"title":"UTC and Offsets","content":"Coordinated Universal Time (UTC) is the global time standard. Time zones are expressed as UTC offsets ranging from UTC-12:00 to UTC+14:00 across the globe."},{"title":"Daylight Saving Time","content":"Many countries shift clocks forward by one hour in summer (DST), temporarily changing the UTC offset. The same city may show different offsets at different times of year."},{"title":"IANA Timezone Database","content":"Timezone names like 'America/New_York' come from the IANA Time Zone Database, the authoritative source used by all computers and mobile devices worldwide."}]}},"xmlFormatter":{"title":"XML Formatter","format":"Format","compress":"Minify","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","invalidXml":"Invalid XML format","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format, minify and edit XML data","Automatic syntax checking","Support code folding and expansion","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"XML Knowledge","introduction":"XML (Extensible Markup Language) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.","items":[{"title":"Basic Syntax","content":"XML documents form a tree structure that starts at 'the root' and branches to 'the leaves'. Elements have checks, attributes and content."},{"title":"Key Features","content":"Self-descriptive, extensible, platform independent, supports Unicode."}],"featuresTitle":"Key Features","features":["Separation of data and presentation","Strict syntax rules","Hierarchical structure","Widely used standard"],"applicationsTitle":"Applications","applications":["Configuration files","Data transport (SOAP, RSS, Atom)","SVG graphics","Document storage"]},"expand":"Expand All","fold":"Fold All"},"yamlFormatter":{"title":"YAML Formatter","format":"Format","copy":"Copy","clear":"Clear","history":"History","darkTheme":"Dark Theme","invalidYaml":"Invalid YAML format","copySuccess":"Copied successfully","historyClearedSuccess":"History cleared","guide":{"title":"Usage Guide","items":["Format and edit YAML data","Automatic syntax checking","Support code folding and expansion","Switch between light and dark themes","Automatically save the last 10 records"]},"knowledge":{"title":"YAML Knowledge","introduction":"YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used to write configuration files.","items":[{"title":"Basic Syntax","content":"YAML uses indentation to represent structure, colons/spaces for key-value pairs, and dashes for lists. It is whitespace sensitive."},{"title":"Key Features","content":"Human readable, supports comments, supports complex data types, no closing tags required."}],"featuresTitle":"Key Features","features":["Highly readable and writable","Strict indentation rules","Supports comments","Superset of JSON (YAML 1.2)"],"applicationsTitle":"Applications","applications":["Configuration files (Docker, Kubernetes, CI/CD)","Data serialization","Log files"]},"expand":"Expand All","fold":"Fold All"},"yamlToml":{"title":"YAML to TOML Converter","description":"Convert YAML to TOML and TOML to YAML online.","yamlLabel":"YAML Input","tomlLabel":"TOML Output","toToml":"To TOML","toYaml":"To YAML","clear":"Clear","sample":"Paste your code here...","features":{"title":"Features","items":["Bidirectional conversion between YAML and TOML","Real-time syntax validation","One-click copy to clipboard","Secure client-side processing"]},"knowledge":{"title":"About YAML & TOML","items":[{"title":"What is YAML?","content":"YAML (YAML Ain't Markup Language) is a human-readable data serialization standard that can be used in conjunction with all programming languages and is often used for configuration files."},{"title":"What is TOML?","content":"TOML (Tom's Obvious, Minimal Language) is a configuration file format that is easy to read due to obvious semantics. It is designed to map unambiguously to a hash table."}]},"guide":{"title":"How to Use","items":["Paste your YAML code into the left editor.","Click 'To TOML' to convert it to TOML format.","Or paste TOML into the right editor and click 'To YAML'.","Use the Copy button to save your result."]}},"zScoreCalculator":{"title":"Z-Score Calculator","description":"Calculate the Z-Score (standard score) for a given raw score, mean, and standard deviation.","rawScore":"Raw Score (x)","mean":"Population Mean (μ)","stdDev":"Standard Deviation (σ)","calculate":"Calculate","clear":"Clear","result":"Z-Score","p_value":"P-Value (Area under normal curve)","invalidInput":"Please enter valid numbers.","zeroStdDev":"Standard deviation cannot be zero.","guide":{"title":"How to Use","items":["Enter the raw score (x) for which you want to calculate the Z-score.","Enter the population mean (μ) of your dataset.","Enter the standard deviation (σ).","Click 'Calculate' to find the Z-score and the corresponding p-value (area to the left)."]},"knowledge":{"title":"About Z-Scores","introduction":"A Z-score (or standard score) indicates how many standard deviations an element is from the mean.","items":[{"title":"Formula","content":"Z = (x - μ) / σ\nWhere:\nx = Raw score\nμ = Population mean\nσ = Population standard deviation"},{"title":"Interpretation","content":"A Z-score of 0 means the score is exactly at the mean. A Z-score of +1 means the score is one standard deviation above the mean. A negative Z-score indicates the score is below the mean."}],"featuresTitle":"Key Features","features":["Calculates the exact Z-score.","Approximates the p-value (cumulative probability) associated with the Z-score."],"applicationsTitle":"Applications","applications":["Comparing scores from different normal distributions.","Hypothesis testing in statistics.","Identifying outliers in a dataset (typically |Z| > 3)."]}},"categories":{"checksum":{"title":"Checksum Tools","description":"Various checksum algorithm tools including XOR, LRC, CRC checksums","tools":{"sum":{"shortTitle":"Checksum Calculator","title":"Online Checksum Calculator","description":"Online checksum calculator. Calculate checksums by summing bytes for data verification. Simple and fast checksum calculation tool.","metadata":{"keywords":["checksum calculator","checksum calc","checksum calculation","calculate checksum","simple checksum","checksum calculator online","byte sum calculator","online checksum tool"],"openGraph":{"title":"Online Checksum Calculator - Free Byte Sum Tool","description":"Calculate checksums online by summing bytes. Simple and efficient tool for basic data verification and integrity checks."}}},"bcc":{"shortTitle":"BCC/XOR","title":"BCC/XOR Checksum Calculator","description":"Online BCC (Block Check Character) and XOR checksum calculator. Calculate BCC checksums for data verification and error detection.","metadata":{"keywords":["bcc calculator online","bcc calculator","bcc checksum","xor checksum calculator","xor checksum","block check character calculator","online bcc tool","checksum calculator"],"openGraph":{"title":"Online BCC/XOR Checksum Calculator - Free Block Check Character Tool","description":"Calculate BCC (Block Check Character) and XOR checksums online. Free tool for data verification and error detection."}}},"lrc":{"shortTitle":"LRC","title":"LRC Checksum Calculator | Longitudinal Redundancy Check Tool","description":"Online LRC (Longitudinal Redundancy Check) calculator. Calculate LRC checksum for data verification and error detection.","metadata":{"keywords":["lrc checksum calculator","lrc calculator online","longitudinal redundancy check calculator","lrc calculator","checksum calculator","online lrc tool"],"openGraph":{"title":"Online LRC Checksum Calculator - Free Longitudinal Redundancy Check Tool","description":"Calculate LRC (Longitudinal Redundancy Check) checksums online. Free tool for data verification and error detection."}}},"adler32":{"shortTitle":"Adler32 Checksum","title":"Adler32 Checksum Calculator","description":"Online Adler32 checksum calculator and hash generator. Fast and reliable data integrity verification tool with RFC 1950 compliance.","metadata":{"keywords":["adler32 hash calculator","adler32 calculator","adler32 checksum","adler32 online","adler32 hash generator","adler32 calculator online","checksum calculator","hash calculator online"],"openGraph":{"title":"Online Adler32 Checksum Calculator - Free Hash Generation Tool","description":"Calculate Adler32 checksums online. Fast, reliable and RFC 1950 compliant tool for data integrity verification. Perfect for ZIP files and streaming protocols."}}},"parity":{"shortTitle":"Parity Check","title":"Parity Check Calculator","description":"Online parity calculator for odd and even parity checking. Calculate parity bits for error detection in data transmission.","metadata":{"keywords":["parity check","parity calculator","odd parity calculator","even parity calculator","parity bit calculator","parity checking","parity calculation","parity bit check","error detection calculator"],"openGraph":{"title":"Online Parity Check Calculator - Odd/Even Parity Bit Tool","description":"Calculate odd and even parity bits online. Free tool for error detection in digital communication and data storage systems."}}},"fletcher":{"shortTitle":"Fletcher Checksum","title":"Fletcher Checksum Calculator","description":"Online Fletcher checksum calculator (16-bit and 32-bit). Fast and reliable error detection algorithm for data integrity verification.","metadata":{"keywords":["fletcher checksum calculator","fletcher checksum","fletcher-16 calculator","fletcher-32 calculator","checksum calculator","data integrity tool","error detection calculator"],"openGraph":{"title":"Online Fletcher Checksum Calculator - 16/32-bit Verification Tool","description":"Calculate Fletcher-16 and Fletcher-32 checksums online. Efficient algorithm for data integrity verification and error detection."}}},"crc":{"shortTitle":"CRC Calculator","title":"CRC Calculator Online | Cyclic Redundancy Check Tool","description":"Online CRC calculator supporting all standard algorithms: CRC-8, CRC-16, CRC-32, CRC-CCITT, MODBUS and more. Professional-grade error detection with custom polynomials.","metadata":{"keywords":["crc calculator","crc online","crc calculation","crc calculator online","crc tool","crc calc","cyclic redundancy check calculator","crc8 calculator","crc-8 calculator","crc8/autosar calculator","crc8/bluetooth calculator","crc8/maxim-dow calculator","crc8/smbus calculator","crc16 calculator","crc-16 calculator","crc16/ccitt-false calculator","crc16/modbus calculator","crc16/xmodem calculator","crc16/dnp calculator","crc16/arc calculator","modbus crc calculator","crc32 calculator","crc-32 calculator","crc32/iso-hdlc calculator","crc32/mpeg-2 calculator","crc32/bzip2 calculator","crc online check","crc verification tool","crc polynomial calculator"],"openGraph":{"title":"Online CRC Calculator - All Standard CRC Algorithms Support","description":"Calculate CRC checksums with all standard parameters including CRC-8, CRC-16, CRC-32, MODBUS CRC. Support custom polynomials. Professional error detection tool with comprehensive algorithm coverage."},"algorithm":{"title":"{algorithm} Online Calculator - CRC Checksum Generator","description":"Free online {algorithm} calculator with HEX and ASCII input support. Provides MSB and LSB format results, Professional cyclic redundancy check tool.","keywords":["{algorithm}","{algorithm} calculator","{algorithm} online tool","{algorithm} check","crc calculator","cyclic redundancy check","checksum calculator"]}}}}},"color":{"title":"Color Tools","description":"Professional tools for color conversion, generation, extraction, and analysis","tools":{"converter":{"shortTitle":"Color Converter","title":"Color Format Converter","description":"Convert between HEX, RGB, HSL, HSV, and CMYK formats with alpha channel support.","metadata":{"keywords":["color converter","hex to rgb","rgb to hsl","cmyk conversion"],"openGraph":{"title":"Color Converter - Professional Online Format Conversion","description":"Quickly convert between various color space formats."}}},"random-color":{"shortTitle":"Random Color","title":"Random Color Generator","description":"Generate beautiful random colors in various formats with dark mode support.","metadata":{"keywords":["random color","color generator","color inspiration"],"openGraph":{"title":"Random Color Generator - 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