Watermark PDF
Stamp text watermarks on every page.
Add a text watermark — 'CONFIDENTIAL', your brand name, a date — to every page of a PDF. Control opacity, size and position, locally in your browser.
How to use
01
Select a PDF
Choose the PDF to watermark.
02
Enter watermark text
Type the text and set opacity, size, position and rotation.
03
Watermark
Click WATERMARK. The text is stamped on every page.
04
Download
Download the watermarked document.
Features
Every page stampedThe watermark is applied to the whole document in one pass.
Opacity controlSubtle or bold — you choose how visible the stamp is.
Position presetsCentered diagonal or corner placement.
LocalRuns entirely in your browser.
Privacy & security
Watermarking happens locally in your browser. The file never leaves your device.
Limitations
- Watermark text uses the standard embedded Helvetica font.
- A watermark added this way can technically be removed by editing the PDF — for hard protection, flatten the file to an image first.
Frequently asked questions
This tool stamps text. For a logo watermark, use Add Image to PDF.
25% opacity is a good default; raise it for 'CONFIDENTIAL' drafts.
Text watermarks can be edited out. For stronger protection, rasterize first.
Yes, free with no sign-up.