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Add a Watermark to a PDF

Watermark a PDF in your browser. Stamp text across every page, including rotated and mixed-size pages. Free, with no upload, no signup and nothing stored.

Runs in your browser — nothing is uploaded. Verify it

About the Add a Watermark to a PDF

Type the text, choose how it should sit on the page, and every page of your PDF is stamped in the browser. Nothing is uploaded, so a contract, a bank statement or an unpublished draft never leaves your computer.

A watermark is how you say what a document is before anyone reads a word of it: CONFIDENTIAL, DRAFT, a client name, a case reference, a date. It also does something practical — an unstamped copy that turns up somewhere has no provenance, while a stamped one tells everyone where it came from. The files people watermark are the files they least want to hand to a website: contracts, medical letters, statements, unfinished work. That is why this one runs entirely in the browser.

How to use the Add a Watermark to a PDF

  1. Select your PDF, or drop it in.
  2. Type the watermark text, then pick a layout, opacity and size. The default repeats the text diagonally, which is the hardest to crop out or paste over.
  3. Download each watermarked PDF, or take the whole batch as a ZIP.

Frequently asked questions

Are my PDFs uploaded to a server?

No. The file is read, stamped and saved inside your browser tab, so nothing is transmitted. You can load the page, disconnect from the internet, and watermark a document to confirm it — there is no server step to call.

Does a watermark hide or remove the text underneath?

No, and this is the most important thing to understand about watermarks. The stamp is drawn on top of the page; the original text is still there and can still be selected, copied and searched. If you need to remove sensitive content rather than label a document, that is redaction and it needs a different tool. A watermark is a label, not protection.

What is the difference between the tiled and centred layouts?

The tiled layout repeats the text diagonally across the whole page, so cropping the stamp out means cropping most of the document, and pasting over one copy leaves a dozen others. A single centred stamp is cleaner to read but trivial to remove. Use tiled for a document you are sending out; use centred or footer when you want the label to stay out of the way.

Will the watermark be straight on a sideways or rotated page?

Yes. Scanned pages are usually stored as landscape pixels plus a rotation instruction, which is why so many tools end up drawing the watermark sideways down the page. The placement here is worked out in the orientation you actually see, so the text reads horizontally on pages rotated 0, 90, 180 and 270 degrees, and mixed-size pages each get their own layout.

Can I watermark a password-protected PDF?

Not while it is protected. Adding a watermark means rewriting the page contents, and a protected file stores those contents encrypted — the result would be a document no reader could open. The tool says so by name instead of producing a broken file. Remove the password first, watermark the file, then re-protect it if you need to.

Does it change the text, fonts or images in my PDF?

No. The watermark is added as a new layer on top of each page; the existing content, fonts, images and vector art are carried through exactly as they were, and the document's own author and producer fields are left alone. Only the pages you stamp change.

Can I watermark several PDFs at once?

Yes. Drop in as many PDFs as you like and the same settings are applied to each; the panel belongs to the whole batch. Download them one at a time or take everything as a single ZIP.

Why can I not use non-English characters in the watermark?

The tool uses one of the PDF standard fonts, which is limited to Western European characters. A Cyrillic, Greek, Arabic or CJK watermark would need a font embedded in the file, which this tool does not do — so it tells you rather than producing a document full of blank boxes. Latin letters, digits and accented characters all work.

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