# 在线计算工具箱 | 好用的在线工具集合
# Online Calculator Toolbox | Professional Online Tools Collection

> 好用的在线工具集合：提供【时间工具】时间戳转换、Unix时间转换、GPS/北斗时间转换、日期计算器、批量时间格式转换；【加密工具】RSA加密解密、AES加密(ECB/CBC/CFB/OFB/CTR/GCM)、SM2/SM4加解密、Base64编解码；【哈希工具】MD5/SHA/SM3哈希计算；【校验工具】CRC/BCC/LRC/Fletcher/Adler32校验计算；【单位转换】长度转换、重量转换；【开发工具】JSON格式化、Modbus工具。所有工具完全免费，无需下载，支持电脑手机。

> Professional online tools collection: offering Time Tools (Timestamp Converter, Unix Time Converter, GPS/BeiDou Converter, Date Calculator, Batch Time Converter); Encryption Tools (RSA, AES with ECB/CBC/CFB/OFB/CTR/GCM modes, SM2/SM4, Base64); Hash Tools (MD5, SHA, SM3); Checksum Tools (CRC, BCC, LRC, Fletcher, Adler32); Unit Converters (Length, Weight); Development Tools (JSON Formatter, Modbus Tools). All tools are free to use, no download required, works on desktop and mobile.

## 核心分类 / Core Categories

- [加密解密工具](https://calctools.online/zh/crypto/aes) / [Encryption Tools](https://calctools.online/en/crypto/aes)
- [哈希工具](https://calctools.online/zh/hash) / [Hash Tools](https://calctools.online/en/hash)
- [HMAC工具](https://calctools.online/zh/hmac) / [HMAC Tools](https://calctools.online/en/hmac)
- [校验工具](https://calctools.online/zh/checksum/crc) / [Checksum Tools](https://calctools.online/en/checksum/crc)
- [格式化工具](https://calctools.online/zh/json-formatter) / [Formatter Tools](https://calctools.online/en/json-formatter)
- [时间工具](https://calctools.online/zh/time/calculator) / [Time Tools](https://calctools.online/en/time/calculator)
- [单位转换](https://calctools.online/zh/converter/weight) / [Unit Converter](https://calctools.online/en/converter/weight)

## 常用工具示例 / Example Tools

### 加密解密工具 / Encryption Tools
- [RSA加解密](https://calctools.online/zh/crypto/rsa) / [RSA Encryption/Decryption](https://calctools.online/en/crypto/rsa)
- [AES加解密](https://calctools.online/zh/crypto/aes) / [AES Encryption/Decryption](https://calctools.online/en/crypto/aes)
- [SM2加解密](https://calctools.online/zh/sm2) / [SM2 Encryption/Decryption](https://calctools.online/en/sm2)
- [SM4加解密](https://calctools.online/zh/sm4) / [SM4 Encryption/Decryption](https://calctools.online/en/sm4)
- [Base64编解码](https://calctools.online/zh/crypto/base64) / [Base64 Encoder/Decoder](https://calctools.online/en/crypto/base64)
- [摩斯密码转换](https://calctools.online/zh/crypto/morse) / [Morse Code Converter](https://calctools.online/en/crypto/morse)

### 哈希和校验工具 / Hash & Checksum Tools
- [哈希生成器](https://calctools.online/zh/hash) / [Hash Generator](https://calctools.online/en/hash)
- [SM3哈希](https://calctools.online/zh/sm3) / [SM3 Hash](https://calctools.online/en/sm3)
- [HMAC生成器](https://calctools.online/zh/hmac) / [HMAC Generator](https://calctools.online/en/hmac)
- [CRC校验计算器](https://calctools.online/zh/checksum/crc) / [CRC Calculator](https://calctools.online/en/checksum/crc)
- [BCC/异或校验](https://calctools.online/zh/checksum/bcc) / [BCC/XOR Checksum](https://calctools.online/en/checksum/bcc)
- [Adler32校验和](https://calctools.online/zh/checksum/adler32) / [Adler32 Checksum](https://calctools.online/en/checksum/adler32)

### 格式化和开发工具 / Formatter & Development Tools
- [JSON格式化](https://calctools.online/zh/json-formatter) / [JSON Formatter](https://calctools.online/en/json-formatter)

### 时间和单位转换 / Time & Unit Conversion
- [时间转换器](https://calctools.online/zh/time/converter) / [Time Converter](https://calctools.online/en/time/converter)
- [卫星时间转换](https://calctools.online/zh/time/satellite) / [Satellite Time Converter](https://calctools.online/en/time/satellite)
- [日期计算器](https://calctools.online/zh/time/calculator) / [Date Calculator](https://calctools.online/en/time/calculator)
- [Cron表达式生成器](https://calctools.online/zh/time/cron) / [Cron Expression Generator](https://calctools.online/en/time/cron)
- [长度转换](https://calctools.online/zh/converter/length) / [Length Converter](https://calctools.online/en/converter/length)
- [重量转换](https://calctools.online/zh/converter/weight) / [Weight Converter](https://calctools.online/en/converter/weight)
- [温度转换](https://calctools.online/zh/converter/temperature) / [Temperature Converter](https://calctools.online/en/converter/temperature)