Watermark PDF

Add a text or image watermark across your pages.

Files never leave your browser

A watermark marks a document as a draft, confidential, or yours — without altering the underlying content. ToucanPDF stamps text diagonally across every page, with control over opacity, angle, size, and color, entirely in your browser.

How it works

  1. 1Select your PDF.
  2. 2Type your watermark text and adjust the opacity, rotation, size, and color.
  3. 3Click “Add Watermark” to download the marked document.

Frequently asked questions

Are my files uploaded to a server?
No. Every ToucanPDF tool runs entirely inside your browser using your device’s own processing power. Your file is read into memory, worked on locally, and handed back as a download — it never travels to us or anyone else. You can even go offline after the page loads and the tool still works.
Can I make the watermark subtle?
Yes. Lower the opacity for a faint background stamp that’s visible but doesn’t obscure the text, or raise it for a bold, unmissable mark.
Does the watermark go on every page?
Yes. The watermark is applied across all pages so the whole document is consistently marked.