Watermark PDF
Add visible text across each PDF page in the browser and download the marked document.

Free browser tool
No Matrix computer needed
✓ No account or card
✓ Use the result right away
✓ Task-specific limits below
Workspace
Use watermark pdf
Runs in this browser tab
Result
How to use it
Choose a PDF, type a short label, and apply the watermark to all pages.
What to check
A visible watermark does not prevent copying or editing the underlying content.
Review the result before using it in a published page, application, or agent configuration.
Quick answers
Frequently asked questions
Does a watermark stop someone editing the PDF?
No. It adds visible text to pages but does not enforce permissions or prevent a recipient from modifying the document.
Where does Matrix apply the watermark?
The chosen short text is stamped across every page in the downloaded copy. Check legibility over light and dark content.
Keep exploring
Related free tools
Need this work to keep going?
Matrix gives agents a private cloud computer for files, connected tools, and work that continues after you close your laptop. The browser tool above is free; a Matrix computer requires a paid plan.