Free Watermark PDF
Stamp text over every page of a PDF.
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About the Watermark PDF
Free tool to watermark a PDF. Add custom text like DRAFT or CONFIDENTIAL diagonally across every page, with adjustable size and opacity — privately in your browser.
How it works
- 1
Upload a PDF
Select the file to mark.
- 2
Set the text
Enter watermark text, size and opacity.
- 3
Download
Save the watermarked PDF.
Frequently asked questions
Yes — type any text, and adjust its size and opacity before applying it to every page.
No. The watermark is applied in your browser and the file never leaves your device.