How to Add a Watermark to a PDF for Security

Protect your intellectual property by stamping a custom text watermark across every page of your PDF.

Document Protection

When sharing draft reports, confidential designs, or proprietary information, adding a watermark (like "CONFIDENTIAL" or "DRAFT") is a standard security practice. It discourages unauthorized sharing and clarifies the document's status.

Using the Watermark Tool

  1. Upload your target PDF.
  2. Type your desired watermark text (e.g., "DO NOT DISTRIBUTE").
  3. Adjust the Opacity (usually 20-30% is best so the text behind it remains readable).
  4. Set the Angle (a 45-degree diagonal stamp is the industry standard).
  5. Click Apply. Tuko will embed the text onto every single page instantly.

Ready to try it?

Use our free Watermark tool to get your task done instantly and securely.

Open Watermark Tool

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