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Watermark PDF

Stamp text like CONFIDENTIAL or DRAFT across your PDF pages.

  • Free
  • No sign-up
  • Runs in your browser
  • Up to 100.0 MB · 30 at a time

Drop your PDF here

or pick them from your device

  • PDF
  • up to 100.0 MB
  • 30 at a time

This runs on your device. Your files are never uploaded.

How it works

Type your watermark, then choose one large stamp in the middle or a repeated pattern across the page, diagonal or level, with the size, colour and transparency you want. It is drawn on top of every chosen page so it shows over scans and photos too, and it lines up the same way on landscape pages. It runs in your browser; nothing is uploaded.

Formats and limits

Accepts
Outputs
Max size
100.0 MB
Per batch
30 files

Your privacy

This tool runs entirely in your browser — your files are never uploaded, whatever their size. No account is needed.

Add a text watermark to a PDF online, free — CONFIDENTIAL, DRAFT, your company name or anything else. Choose one stamp or a repeated pattern, the angle, size, colour and transparency. It runs in your browser; nothing is uploaded.

One stamp or a full pattern

Place a single large watermark across the middle of each page, or repeat it across the whole page so it cannot simply be cropped out. Choose diagonal or level text, its size, colour and how transparent it is.

Private by design

Documents you watermark are usually the sensitive ones. This runs entirely in your browser, so the PDF is never uploaded anywhere.

How to use Watermark PDF

  1. 1Choose one or more PDFs.
  2. 2Type the watermark and pick the layout, angle, size and opacity.
  3. 3Press Watermark — it happens in your browser.
  4. 4Download the watermarked PDF, or all of them as a ZIP.

When to use Watermark PDF

  • Marking drafts so nobody mistakes them for the final version.
  • Stamping CONFIDENTIAL or a recipient’s name on documents you share.
  • Branding proofs and samples before sending them to a client.

Tips

  • Around 20–30% opacity keeps the page readable while the watermark stays obvious.
  • Repeated across the page is much harder to remove than a single stamp.

Frequently asked questions

Is my PDF uploaded?

No. The watermark is added entirely in your browser.

Will the watermark show over images and scans?

Yes. It is drawn on top of the page, at the transparency you choose.

Can I watermark only some pages?

Yes. Choose odd or even pages, or type page numbers such as 1, 3-5.

Which characters can I use?

Latin letters, numbers and common symbols. Other scripts are not supported yet.