Watermark PDF
Add a text watermark to every page.
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About the Watermark PDF
Watermark a PDF free — stamp diagonal text like DRAFT, CONFIDENTIAL, SAMPLE, or your company name across every page, with an opacity slider from barely-there to bold. Watermarks discourage unauthorized reuse and make a document's status unmistakable before it circulates. Everything runs in your browser; sensitive files never leave your device.
How to use the Watermark PDF
- 01Upload a PDF.
- 02Enter your watermark text and opacity.
- 03Download the watermarked PDF.
Frequently asked questions
Are my files uploaded to a server?
No. Every PDF tool here runs entirely in your browser — your files never leave your device.
Can I control how visible it is?
Yes — adjust the opacity slider from subtle to bold.
Can a watermark be removed?
It's embedded into the page content, so casual removal is hard — but no watermark is tamper-proof against determined editing. Treat it as a deterrent and status label, not security.