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 sensitive drafts, confidential financial records, or copyrighted material can be risky. PDFUp's Watermark tool allows you to assert ownership and clearly indicate a document's status by stamping large text across every single page.
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.
Applying a watermark to a 500-page document online can freeze your browser. PDFUp utilizes optimized client-side libraries to stamp every page instantaneously.
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.
If you're sharing a confidential business plan, a draft of a novel, or a set of proprietary designs, you need to stamp a watermark across every page to protect your work. However, if you use a standard online watermarking tool, you are forced to upload your unsecured, highly sensitive files to a third-party server. Sending your un-watermarked intellectual property into the cloud defeats the entire purpose of trying to protect it.
Our watermarking tool ensures your data stays safe by running completely on your local machine. Your browser handles all the processing. You can type out your custom text, adjust the color, size, and transparency, and apply it to every page without your document ever leaving your computer. Your files remain entirely under your control.
Because there are no heavy files to upload or download, the tool is incredibly fast. You can stamp a watermark across a massive 500-page document in seconds. It provides the speed and power of desktop software right in your browser, ensuring your work stays private and secure from start to finish.