Watermark PDF
Add a diagonal text watermark to every page of your PDF. Free, no sign-up, and your files never leave your device.
Private by design: your files never leave this device. All processing happens in your browser — nothing is uploaded to any server.
How to use this tool
- Choose a PDF to watermark.
- Type the watermark text.
- Stamp it and download the watermarked file.
Honest limit: The watermark appears diagonally on every page; it cannot be limited to selected pages.
Questions about this tool
What does the watermark say?
Whatever text you type — it is stamped diagonally across the pages.
Can I watermark only some pages?
No — the watermark is stamped on every page of the file.