Watermark PDF
Watermark PDF is a free browser tool that stamps a text watermark across your PDF pages with full control over opacity, rotation, size and position — plus diagonal tiling across the page and five ink colors. Everything stays local.

Drop PDF files here or click to browse
Files stay in your burrow: everything is processed on your device, never uploaded.
How to use this tool
- 1Drop a PDF into the tool.
- 2Type the watermark text (e.g. DRAFT or CONFIDENTIAL).
- 3Tune opacity, rotation, size and position.
- 4Click Apply and download the watermarked PDF.
FAQ
Can the watermark be removed later?
A stamped watermark becomes part of the page content, so treat it as permanent. Always keep your original file if you may need a clean copy.
Which fonts and languages can the watermark use?
The standard embedded fonts cover Latin, Cyrillic and Greek. For CJK text, symbols or an image logo, split the watermark into an image overlay workflow.