Watermark PDF Free
Stamp custom text watermarks across all pages with opacity, rotation, and color settings.
- 100% free
- Files stay on your device
- No sign-up, no watermark
Select a PDF to watermark
PDF documents up to 100 MB
What is Watermark PDF?
Protect sensitive business proposals and contracts prior to distribution. Add diagonal or horizontal watermarks like "CONFIDENTIAL", "DRAFT", or your company name with custom opacity, color, and font sizing.
How to use Watermark PDF
- 1
Add your file or input
Choose a supported file, drag it onto the upload area, or type/paste the data this tool works with.
- 2
Adjust the options
Pick the output format, quality, size or other settings the tool offers. Defaults work well for most files.
- 3
Process and download
Run the tool and save the result. Processing happens in your browser, so nothing is uploaded to a server.
Frequently asked questions
Can I customize the watermark transparency and angle?
Yes. You can adjust opacity from subtle 15% shading to bold stamps, set rotation angles (e.g. 45 degrees diagonal), and select custom text colors.
Does the watermark appear above or below the document text?
The watermark is rendered as an overlay content stream with alpha blending, ensuring it remains visible across both text and background graphics without obscuring reading.
Can someone easily remove a stamped PDF watermark?
The watermark is written directly into each page’s content stream operators, making it impossible to strip without specialized desktop PDF editor software.
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