Watermark a PDF — without uploading
Stamp CONFIDENTIAL, DRAFT, or any text diagonally across every page. Applied on your device, never on a server.
100% private — files never leave your device
How it works
- 1
Drop a PDF file.
- 2
Type the watermark text and tune opacity, color, and direction.
- 3
Download the watermarked PDF, built in your browser.
Related tools
Frequently asked questions
Is my document uploaded to add the watermark?
No. The watermark text is drawn onto each page by code running in your browser. The file never leaves your device.
Can the watermark be removed later?
The watermark becomes part of the page content, like printed text. It isn't a separate layer a viewer can simply toggle off, though determined editing tools can alter any PDF.
What can I customize?
The text, its opacity, gray or red color, and diagonal or horizontal orientation. The size scales automatically to each page.