Watermark PDF
Stamp a semi-transparent diagonal text watermark across selected pages.
How to use
The Watermark PDF is a free online tool — no sign-up or download is required. Stamp a semi-transparent diagonal text watermark across selected pages.
- Choose a PDF file and type your watermark text.
- Pick an opacity and optionally limit the pages.
- Click Add Watermark and download the stamped PDF.
Frequently asked questions
What does the Watermark PDF do?
Free PDF watermarker: add a diagonal text watermark (DRAFT, CONFIDENTIAL...) to PDF pages online. Runs in your browser.
How do I use the Watermark PDF?
Open the Watermark PDF page, upload your file using the form above, adjust the options, then click the main action button to get your result instantly. Download the result when done. No sign-up or installation is needed.
Is the Watermark PDF free to use?
Yes. The Watermark PDF is completely free, like every tool on SEO Tools by metacalculator.org. There is no sign-up, no watermark and no hidden limits.
Is my data private when I use the Watermark PDF?
Yes. This tool runs entirely in your browser, so your input never leaves your device. Nothing is uploaded, stored or shared.