Watermark PDF
Stamp your PDF with text across every page. Set the words, size, and opacity, then download, all inside your browser.
100% private. Your files are processed entirely in your browser and never uploaded.
How to watermark a PDF
- Add your PDF by dropping it in the box above or clicking to browse.
- Type your watermark text and set the size and opacity.
- Click Add watermark to download the stamped PDF.
FAQs about Watermark PDF
Are my files uploaded to add a watermark?
No. The watermark is drawn inside your browser on your own device. Nothing is sent to a server, so your document stays private the whole time you work.
Where does the watermark appear?
Your text is placed diagonally across the center of every page in a light gray, so it marks the document clearly while keeping the content underneath readable.
Can I change how strong it looks?
Yes. Adjust the size and the opacity. A lower opacity gives a faint background stamp, while a higher value makes the watermark bold and prominent.
Does it change my original content?
No. The watermark is drawn on top as a new layer. The existing text and images are untouched, so nothing under the stamp is altered.