Watermark PDF
Add a text watermark to every page.
Free · No sign-up · Works in your browser
About the Watermark PDF
Free PDF watermark tool — stamp custom diagonal text (like DRAFT or CONFIDENTIAL) across every page with adjustable opacity.
How to use the Watermark PDF
- 1Upload a PDF.
- 2Enter your watermark text and opacity.
- 3Download 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.