PDF tool

Add Watermark

Stamp text across every page — perfect for marking drafts or confidential files.

100% local — files never leave your deviceProcessed in your browser

How it works

Upload a PDF.
Type your watermark text and set opacity and size.
Apply and download the stamped file.

Good to know

The watermark becomes real page content under the text layer — visible everywhere, hard to remove without editing tools.
Every step runs locally in your browser using Web Workers — your file is never uploaded to any server.