PDF Editor

How to Add a Watermark to a PDF (Free)

Protect your proprietary designs, assignments, or legal drafts from unauthorized copying by stamping a custom watermark layer.

Step-by-Step Tutorial

  1. Open our Add Text / Watermark tool.
  2. Upload your PDF document.
  3. Enter your custom text (e.g. 'CONFIDENTIAL', 'SAMPLE', or your name).
  4. Set size, rotation angle (usually 45°), opacity (30% is recommended), and color.
  5. Click Start Adding Text to download your securely watermarked PDF!

Ready to do this task? Use our free, 100% private, browser-based tool:

🅰️ Open Free Add Text / Watermark Tool →

🔒 100% Private · No sign-up · Files never leave your device

Pro Tips & Best Practices

  • Set opacity around 20-30% so your watermark is clearly visible but doesn't block the underlying text readability.
  • Watermarking is an excellent way to protect KYC drafts (like writing 'Used only for bank verification' across the card).

Frequently Asked Questions

Can the watermark be easily removed?

We flatten the watermark text directly into the page's vector content layer, making it very difficult to strip out compared to simple image overlays.

Does it support multi-page watermarking?

Yes, the watermark is applied to every page of the document automatically.

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