Add Watermark to PDF Online

Add custom text watermarks to all PDF pages — «CONFIDENTIAL», «DRAFT», «SAMPLE», or company name. Free & private.

Select a PDF
or drop here · up to 200 MB

Also Known As: PDF watermark · watermark PDF online · stamp PDF

How It Works

  1. Select your PDF document.
  2. Enter your watermark text (e.g. «CONFIDENTIAL», «DRAFT», or company brand).
  3. Customize angle (diagonal or tiled), opacity, font size, and color.
  4. Click «Add Watermark» to download your protected PDF.

About Add Watermark to PDF Online

Vector-level watermark stamping that applies uniformly across every page of your PDF.

Configurable transparency prevents the watermark from obscuring underlying document text.

Safe and private: no files or confidential data are transmitted to any remote servers.

Frequently Asked Questions

Can I adjust the transparency of the watermark?

Yes! You can adjust the opacity slider so the watermark is clearly visible without blocking the readability of the document text.

Does it apply to all pages?

Yes, the watermark is applied consistently to every page in your document.

Is my document uploaded to a server?

No. All watermark processing is computed locally in your web browser.