Watermark PDF
Add a diagonal text watermark across every page of a PDF. Set the text and strength, then download. The watermark is drawn locally in your browser.
- Runs entirely in your browser
- No sign-up, no watermark
- Free and unlimited
Need to scan documents from your phone?
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How to use Watermark PDF
- 1
Drop a file onto Watermark PDF, or click to choose from your device.
- 2
Set any options for how the file should be processed.
- 3
Press the action button — everything runs in your browser.
- 4
Download the result. Nothing is uploaded or stored.
What you get
- Custom text
- Light, medium or strong
- Applied to all pages
What happens to your files
This tool runs entirely in your browser. The file you choose is read into memory, processed on your device, and offered back as a download. Nothing is uploaded and nothing is kept once you leave the page.
There is no account, no email, no watermark and no daily limit. Come back whenever you need it.
Frequently asked questions
- Which characters can I use?
- The watermark uses a standard PDF font, so it supports Latin letters, numbers and basic symbols. Other scripts are removed.