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Free Online PDF Watermark Tool

Overlay text watermarks on PDF pages

Drop a PDF here or click to browse

Client-side only — your file never leaves your browser

How to Use Add Watermark

  1. 1

    Upload your PDF

    Drag and drop or click to select a PDF file.

  2. 2

    Configure watermark

    Enter text, adjust opacity, rotation, size, and pick a color.

  3. 3

    Download

    Click 'Add Watermark' and download the watermarked PDF.

Frequently Asked Questions

Is my data safe?
Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.
Can I adjust the watermark transparency?
Yes. Use the opacity slider to set transparency from 0% (invisible) to 100% (fully opaque). The default 30% is subtle enough to read through.
Is the watermark permanent?
The watermark is drawn directly on the PDF pages. It will appear when viewing, printing, or sharing the document. However, it can be removed by someone with PDF editing software.
Can I watermark specific pages only?
Currently, the watermark is applied to all pages. For selective watermarking, consider splitting the PDF first, watermarking the desired pages, then merging them back.

Learn more

About Add Watermark

Add text watermarks to PDF documents directly in your browser. Configure the watermark text, opacity, rotation angle, font size, and color to match your needs. Perfect for marking documents as 'CONFIDENTIAL', 'DRAFT', or adding your company name across every page. The watermark is rendered directly into the PDF — no external software needed. All processing happens client-side for complete privacy.

Why Use Add Watermark?
  • 100% client-side — your documents never leave your device.
  • Fully customizable: text, opacity, angle, size, and color.
  • Applied to every page consistently with a single click.
  • No sign-up, no limits, no watermarks on the watermark tool itself.
Common Use Cases

Mark confidential documents

Add 'CONFIDENTIAL' or 'INTERNAL USE ONLY' watermarks to sensitive business documents.

Draft identification

Stamp 'DRAFT' on documents under review so recipients know the content may change.

Branding

Add your company name or logo text diagonally across pages for brand protection.

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