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Handy Browser Tools

Add Watermark to PDF

Stamp a diagonal, translucent text watermark across every page of your PDF, right in your browser. Type your message, tune opacity, font size, and angle, then download the watermarked file.

How to use
Private by default: processing stays on your device
YOUR PDF

Start with a PDF

Choose a PDF to watermark. It never leaves your device.

Drop your PDF here or browse files PDF · PROCESSED ON YOUR DEVICE
File details

The watermark is stamped across the center of every page. Your original PDF is never modified.

Stamp every page.

Type the text, tune how it looks.

25%
More transparentMore visible
48 pt
SmallLarge
-45°
-90°90°

The watermark is stamped diagonally across the center of every page. Adjust the angle to tilt it left (negative) or right (positive).

Good to know

Watermarks are added on your device; the original file is never modified or uploaded.

How to use this tool

  1. Choose a PDF from your device.
  2. Type watermark text and adjust opacity, font size, and rotation.
  3. Select Add watermark, then download the result.
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Frequently asked questions

Are my PDF files uploaded?

No. The watermark is applied directly in your browser, so your document never leaves your device and is never stored on any server.

How transparent should my watermark be?

Opacity ranges from 5% to 90%. A lower opacity keeps the watermark unobtrusive while still discouraging casual copying; raise it when the text must stay legible over busy pages.

How do I make the watermark diagonal?

The watermark is drawn diagonally by default at -45°. Use the rotation slider between -90° and 90° to tilt it left or right, or set 0° for horizontal text.

Can I watermark an encrypted PDF?

Encrypted PDFs are rejected because their contents cannot be modified without the password. Save an unencrypted copy of the document and try again.

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