Upload the PDF, type the watermark text, and click Add watermark - the download stamps that text diagonally across every page in a gray, semi-transparent style.
Need another quick PDF fix? To turn sideways pages upright, see rotate PDF.
Add Watermark to PDF
Add a watermark to every page of a PDF, right in the browser.
Applies one fixed diagonal text style (gray, semi-transparent, centered) - does not support custom position, color, size, image watermarks, or a different watermark per page.
The watermark text size adjusts automatically to fit each page's width, so the same text stays readable whether the PDF is portrait or landscape, letter or A4.
The same watermark text is stamped on every page of a multi-page PDF in one pass - no repeated uploads or per-page steps.
The whole watermarking pass runs on your device in this tab; the PDF never leaves the browser or reaches a server.
Compared with a desktop app or an upload-based service
Three common ways to stamp a watermark on a PDF are a browser-based tool like this one, a desktop application, or an upload-based online service. They differ in where your file goes and what you have to install first.
| Aspect | Add Watermark to PDF (this tool) | Desktop application | Upload-based online service |
|---|---|---|---|
| Where your file goes | Stays on this device | Stays on this device | Uploaded to a server |
| Install required | No | Yes | No |
| Works without an account | Yes | Yes | Varies by service |
Frequently Asked Questions
What does Add Watermark to PDF do?
Add a watermark to every page of a PDF, right in the browser.
When should I reach for add watermark to pdf?
Applies one fixed diagonal text style (gray, semi-transparent, centered) - does not support custom position, color, size, image watermarks, or a different watermark per page.
What complementary tools work well alongside add watermark to pdf?
To split, merge, rotate, or delete pages from the PDF instead, see the related-tools section.