Watermark PDF
Stamp text like CONFIDENTIAL or DRAFT across every page of a PDF.
Drop PDFs here
One or several — the same settings apply to each file
Files are processed on this device. Nothing is uploaded.
How to use Watermark PDF
- Add a PDF.
- Type the watermark text and adjust size, opacity, angle and colour.
- Select Add watermark and download.
How it works
The watermark is drawn as semi-transparent text on top of every page, using Helvetica Bold. Tiled mode repeats it across the page, which makes it much harder to crop out of screenshots.
A visible watermark discourages misuse and marks drafts clearly, but it is not tamper-proof: a determined person with editing software can remove text overlays. For legal protection, combine it with access control and keep the original.
Frequently asked questions
Can someone remove the watermark?
With PDF editing software, yes. It is a deterrent and a label, not security.
Can I use my logo?
Only text is supported for now.
Which characters can I use?
Western (Latin-1) letters, digits and common punctuation. Other characters are replaced with "?" and the tool warns you.
Is my PDF uploaded?
No.
Limitations
- Text only (no image watermarks).
- Latin-1 characters only.
- Password-protected PDFs are refused with an explanation; remove the protection first.
Last reviewed November 9, 2026. How we build and test tools.