PDF Watermark
Add a text watermark to every page of a PDF.
Click to upload a PDF file
Add text watermarks to PDF documents
Protect your PDFs with a customizable text watermark applied to every page. Set position, angle, font size, color, and opacity. The watermark is embedded directly in the PDF — no external service required.
Frequently asked questions
- Can I add a diagonal watermark to a PDF?
- Yes — use the angle slider to set the rotation. 45° gives the classic diagonal watermark. Combine with 'Center' position for a full-page diagonal stamp.
- Will the watermark be permanent?
- The watermark is embedded in the PDF structure. It cannot be easily removed by users without PDF editing tools. For maximum security, flatten the PDF after watermarking using a separate PDF editor.
- What fonts are available?
- This tool uses Helvetica Bold, which is a built-in PDF font guaranteed to be available in all PDF viewers. Custom fonts would require embedding the font data, which increases file size significantly.