How to use
- Select or drop a PDF.
- Type your watermark text and adjust size and opacity.
- Download the watermarked PDF.
Frequently asked questions
Where does the watermark appear?
It’s drawn diagonally across the centre of every page so it’s visible without hiding the content.
Can I change how strong it looks?
Yes — adjust the font size and opacity until it looks right.
Are my documents private?
Completely. Watermarking runs in your browser; nothing is uploaded.
About this tool
Add a diagonal text watermark such as “CONFIDENTIAL” or “DRAFT” to every page of a PDF, with adjustable size and opacity. Processed entirely in your browser.