Online Calculate Tools
English

Add Watermark to PDF Online

Add text watermarks to PDF documents. Customize font size, color, opacity, and rotation angle. Protect your documents with custom watermarks.

Upload PDF File

Drag & drop an image here, or click to select

Max file size: 100MB

How to Use

  1. Upload a PDF file by clicking the upload area or dragging and dropping.
  2. Enter the watermark text you want to add.
  3. Customize the appearance: font size, opacity, rotation angle, and color.
  4. Choose the watermark position: center or tiled across the page.
  5. Click 'Add Watermark' to apply the watermark to all pages.
  6. Download the watermarked PDF file.

About PDF Watermarks

What are PDF Watermarks?

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.

Text vs. Image Watermarks

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.

Opacity and Visibility

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.

Tiled vs. Centered Watermarks

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.

Key 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

Common Use Cases

  • 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