Free · no signup · nothing uploaded
Watermark PDF
Stamp a text watermark like DRAFT or CONFIDENTIAL — or add page numbers — across every page of a PDF, right in your browser.
Choose a PDF to stamp
or drop your file here.
Runs in your browser — your file is never uploaded.
Short answer
To watermark a PDF, type your text (e.g. DRAFT), choose your file, and download — the text is stamped diagonally across every page at a light opacity. Prefer numbers? Switch to page numbers. Free, and nothing is uploaded.
Watermark & page-number guides
How to add a watermark to a PDF
- 1Open the tool. Open the Watermark PDF tool — no signup or install.
- 2Type your watermark. Enter the text (e.g. DRAFT or CONFIDENTIAL), or switch to page numbers.
- 3Choose your PDF. Drag it in or click to select.
- 4Download. The stamped PDF is generated in your browser — nothing uploaded.
What adding a watermark does
| PDF feature | After this tool runs | Why |
|---|---|---|
| Watermark text | Drawn on every page | Painted into each page's content stream |
| Existing content | Untouched underneath | The mark is layered over it |
| Text | Stays selectable | Both the page and the mark are real text |
| Removability | Not easily removed | It becomes part of the page content |
| File size | Barely changes | Text adds only a few bytes per page |
| Page numbers | Optional, per page | Numbered in document order |
The watermark is drawn into the page rather than added as an annotation a viewer could toggle off — which makes it durable, but also means it cannot be cleanly undone. Work from a copy.
Frequently asked questions
Is my PDF uploaded to add a watermark?+
No. The watermark or page numbers are stamped in your browser and the file is never sent to a server — safe for confidential documents.
Can I add DRAFT or CONFIDENTIAL across every page?+
Yes. Type any text and it's stamped diagonally across every page at a light opacity, so the content stays readable underneath.
Can I add page numbers instead?+
Yes — switch to page-number mode and each page gets a number (e.g. '1 / 12') at the bottom.
Will the watermark reduce quality?+
No. The text is drawn as a vector layer over the existing pages; the original content is untouched.
Is it free?+
Yes — no signup, no watermark of ours, and it runs entirely in your browser.
Related tools
Your PDF is stamped entirely in your browser and is never uploaded. Provided free and ad-supported, without warranty.