How to add a watermark to a PDF
To add a watermark to a PDF, open a browser-based watermark tool, type your text (such as CONFIDENTIAL or DRAFT), set its colour, opacity, and angle with a live preview, and download the file - the watermark is stamped on every page. It runs on your device, so the PDF is never uploaded, with no sign-up. The watermark becomes part of the exported file, so keep an unmarked original.
A watermark marks a document’s status or ownership - CONFIDENTIAL, DRAFT, a company name - across every page. Here is how to add one without uploading the file, and what to keep in mind before you download.
Add a watermark, step by step
- Open the in-browser watermark tool and drop in your PDF.
- Type your watermark text and set the colour, opacity, and angle - a live preview shows the result.
- Download the watermarked PDF.
The watermark is stamped on your device and applied to every page, auto-sized to each page.
Good to know before you download
The watermark becomes part of the exported file - it cannot be removed from the output afterwards - so always keep an unmarked copy of the original. This tool adds a text watermark; image or logo watermarks are not supported yet. A password-protected PDF must be unlocked first.
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Is it safe to watermark a confidential PDF online?
A watermark like CONFIDENTIAL usually goes on a sensitive document - which is exactly the kind you should not upload. A browser-based watermark tool stamps the file on your device, so it is never sent to a server. You can confirm nothing is uploaded with the browser Network-tab test.
Frequently asked questions
- How do I add a watermark to a PDF for free?
- Open the PDF in a browser-based watermark tool, type your text, set the colour, opacity, and angle, and download - the watermark is stamped on every page, with no sign-up or upload.
- Does the watermark go on every page?
- Yes - it is stamped across every page and auto-sized to each page.
- Can I remove the watermark later?
- Not from the exported file - the watermark becomes part of it. Keep an unmarked copy of the original if you may need one.
- Can I use an image or logo as a watermark?
- This tool adds a text watermark; image or logo watermarks are not supported yet.