Add Watermark to PDF
Stamp text or a logo across a PDF's pages. Free, and runs entirely in your browser — nothing you enter is uploaded, stored or sent to a server.
About Watermark PDF
Writes words or a picture across a document's pages — DRAFT, CONFIDENTIAL, a client name, a company logo. The mark can sit once in a corner or in the middle, or repeat across the whole page on the diagonal, at whatever size, angle, colour and opacity you set.
A watermark is a mark, not a lock. It is drawn on top of the page and anyone with a PDF editor can take it off again. What it does well is make a copy obviously a copy, and remind whoever opens the file what it is — which is usually the whole job.
Where it helps
- Text or a picture, once per page or tiled across it.
- Size, angle, colour, opacity, position and margin are all adjustable.
- Specific pages can be marked instead of the whole document.
- The document and the logo both stay in this tab.
Limits
- A watermark can be removed by anyone with a PDF editor — it marks a document, it does not protect one.
- It is drawn on top, so it can obscure content underneath; lower the opacity if it does.
- Pictures have to be PNG or JPEG, the two formats a PDF carries directly.
- The text is set in a standard PDF font, so characters outside Latin-1 are replaced.
Frequently asked questions
Can the watermark be removed?
Yes, by anyone with a PDF editor. It is a visible mark, not a protection. Use PDF Password if you need the file itself restricted.
Why is my watermark hiding the text?
Lower the opacity — 15 to 25 per cent is usually enough to read through — or move it into a corner.
What picture formats work?
PNG and JPEG. A PNG with a transparent background sits best over a page.
Can I mark only some pages?
Yes. Name them in the pages box, like "1" for a cover sheet or "2-9" for the body.
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