Add Watermark to PDF

Protect confidential documents and mark draft proposals with custom diagonal or horizontal watermarks.

How to Use Watermark PDF

  1. Drop your PDF document into the watermark workspace.
  2. Enter your watermark text and adjust font size, opacity, and rotation angle.
  3. Click Apply Watermark to generate and download your protected PDF.

Technical Specifications & How It Works

Watermarking deters unauthorized distribution and marks documents clearly as confidential, draft, or sample copies.

100% Client-Side Privacy: Your documents stay strictly within your device. PDF manipulations execute in-memory using pdf-lib. Zero bytes leave your browser, ensuring absolute confidentiality for financial, legal, or personal files.

Frequently Asked Questions

Can I adjust watermark transparency?

Yes. Use the opacity slider to ensure underlying text remains readable.

Can the watermark be applied at an angle?

Yes. Choose diagonal (45 degrees), horizontal, vertical, or reverse diagonal angles.

Will watermarking work on multi-page files?

Yes. The watermark is stamped across every single page in your document instantly.

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