Watermark PDF
Stamp text over every page
About this tool
Overlay a custom text watermark such as CONFIDENTIAL or DRAFT on every page of your PDF. Control the font size, color, opacity, rotation angle and whether the text is centered or tiled across the page. Everything runs in your browser.
Edits are applied locally in the browser. That keeps annotations, watermarks, crops, and page numbers on your machine instead of a remote render farm.
How to use it
- Upload the PDF you want to edit.
- Configure the edit options for this tool.
- Apply changes and preview the result when available.
- Download the edited PDF to keep a local copy.
Common use cases
- Stamp drafts with watermarks before sharing.
- Add page numbers for print-ready packets.
- Crop scanned margins for cleaner reading.
- Make lightweight edits without Acrobat.
Frequently asked questions
Can I tile the watermark across the page?
Yes. Choose the "Tiled" layout to repeat the text in a diagonal pattern over the whole page.
Can I make it semi-transparent?
Yes. Adjust the opacity value so the watermark sits subtly behind your content.
Does Watermark PDF upload my files or text?
No. Processing is designed to run in your browser. Your inputs are not uploaded to DevToolDeck servers for conversion.
Do I need an account?
No. You can use the tool immediately without signing up.
Is the tool free?
Yes. DevToolDeck tools are free to use in the browser. The site may show ads to keep the service available.