Stamp a custom text watermark across every page of your PDF.
Drop your PDF here
or click to browse from your device
Your PDF has been successfully watermarked.
Sharing drafts, financial records, or copyrighted material is risky. Stamp ownership and document status across every page with custom text.
Select the document you wish to protect.
Type your custom text (e.g. 'CONFIDENTIAL'). Choose the text color and adjust opacity so it doesn't block the document.
Click Apply. The watermark will be stamped diagonally across every page instantly.
Watermarking a 500-page document online can freeze your browser. PDFUp stamps every page instantly with optimized client-side libraries.
If a document is sensitive enough to require a 'CONFIDENTIAL' watermark, it shouldn't be uploaded. Our offline architecture ensures your files never touch our servers.
The watermark is permanently flattened into the PDF page's content stream, making it very difficult for average users to remove.
Currently, our tool only supports text-based watermarks.
No. The watermarking happens on your device in your web browser. We never see your files.
A confidential business plan, a novel draft, proprietary designs: those need a watermark on every page. Using an online watermarking tool means sending the unwatermarked original to a third party first, which defeats the whole purpose.
This tool runs on your machine. Type your text, set the color, size, and transparency, and apply it to every page without the document leaving your computer.
It's fast too. A 500-page file gets stamped in seconds, no upload or download involved.
Related reading: watermarking PDFs to protect your work.