How to Use Add Watermark to PDF
Stamp a diagonal text watermark across every page of a PDF.
Open the Add Watermark to PDF tool →What is Add Watermark to PDF?
Stamp a diagonal text watermark across every page of a PDF. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use Add Watermark to PDF
- Open the Add Watermark to PDF tool.
- Select or drop in your PDF file.
- Set the options for what you want to do.
- Download the new PDF. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
Where does the watermark go?
A diagonal text watermark is centered on every page, with adjustable size and opacity.
Is my PDF uploaded?
No — the watermark is added locally with pdf-lib; your file never leaves your device.
Ready to try it?
Open Add Watermark to PDF →