FAHAQ

Watermark PDF

Add a diagonal text watermark to every page.

Drop a PDF here
or click to choose a file · it never leaves your browser

Free PDF watermark tool. Upload a PDF, type your watermark text, set the opacity, and stamp a diagonal watermark across every page. Runs in your browser — nothing is uploaded.

How to use the Watermark PDF

  1. 01Drop your PDF in, or click to choose it.
  2. 02Type your watermark text and set the opacity.
  3. 03Click Add Watermark — the watermarked PDF downloads instantly.

Frequently asked questions

Can I control how visible the watermark is?

Yes. The opacity slider sets how faint or bold the watermark appears, from a subtle 5% up to fully solid.

Is my PDF uploaded?

No — the watermark is applied locally in your browser, so your document never leaves your device.