ToolRun
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PDF Watermark

Add a text watermark to every page of a PDF. Customize font size, opacity, and angle. All processing happens in your browser.

PDF Watermark

Add a text watermark to every page of a PDF. All processing happens in your browser.

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Drop a PDF file here or click to select

Add Watermarks to PDF

This tool adds a customizable text watermark to every page of your PDF. Common uses include marking documents as "CONFIDENTIAL", "DRAFT", "SAMPLE", or adding your company name. You can adjust the text, font size, transparency, and rotation angle.

Customization Options

  • Watermark Text: Any text you want to appear on each page.
  • Font Size: From 10px to 200px. Larger sizes create more prominent watermarks.
  • Opacity: From 5% (barely visible) to 100% (fully opaque). 15-25% is typical for document watermarks.
  • Angle: From -90° to 90°. A 45° diagonal is the most common watermark orientation.

How It Works

The tool uses pdf-lib to draw text on each page of your PDF using the Helvetica font. The watermark is rendered as a semi-transparent text overlay centered on each page. The original page content is preserved — the watermark is added on top. All processing happens in your browser.

Frequently Asked Questions

Can I remove the watermark later?
The watermark is permanently drawn onto the PDF pages. To get an unwatermarked version, you would need to re-apply the watermark to a fresh copy of the original PDF. Always keep your original unwatermarked file.
Can I use a custom font or image watermark?
Currently this tool supports text watermarks using the Helvetica font. Image watermarks and custom fonts may be added in a future update.
Will the watermark appear on every page?
Yes, the watermark is applied to every page of the PDF at the same position, size, and opacity.
Are my files uploaded to a server?
No. All processing happens locally in your browser. Your PDF never leaves your device.

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