Watermark a PDF
Stamp a diagonal text watermark across every page. Runs entirely in your browser.
Stamp a text watermark — like DRAFT or CONFIDENTIAL — diagonally across every page of a PDF. All in your browser, no uploads.
How to use Watermark PDF
- Choose a PDF, or drop it onto the page.
- Type your watermark text and set the opacity.
- Click Apply & download to get the watermarked PDF.
Frequently asked questions
Can I control how strong the watermark is?
Yes — the opacity slider sets how faint or bold the text appears over your pages.
Are my files uploaded?
Never. The watermark is drawn onto each page locally in your browser.
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