Add a watermark to a PDF
Diagonal or flat text on every page, no upload.
Files stay on your device. No accounts. Free.
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About this tool
Stamp CONFIDENTIAL, DRAFT, PAID or any text across your PDF: choose the opacity, diagonal or horizontal placement, and which pages get it. The text is sized automatically to span the page.
The watermark is written into the document by pdf-lib running in your browser, so the sensitive documents that most need watermarking, agreements, reports, drafts, never touch a server.
How it works
- Drop your file(s), they are read locally on your device.
- Set the options you need and run the tool.
- Download the finished PDF, images or text.
Frequently asked questions
Can the watermark be removed later?
It is drawn into the page content, so casual viewers cannot remove it, but like any visible watermark a determined person with editing tools could. Treat it as labelling, not security.
Can I watermark only some pages?
Yes, type a range like 1-3,5 the way you would in a print dialog, or leave it as all.
Does watermarking reduce the document quality?
No, nothing is re-rendered. The pages keep their original text and images; the watermark text is simply drawn on top with the transparency you chose.