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Pdf Watermark

Complete PDF toolkit — merge, split, convert, edit, compress, sign, and protect your PDFs.

100% Private

Files never leave browser

Lightning Fast

Client-side processing

No Signup

Just open and use

Secure

No server uploads

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About Add Watermark to PDF Online Free — Stamp PDFs Instantly

Add text watermarks to your PDF documents for free. Customize opacity, position, font, size, and rotation — including diagonal watermarks. No signup or installation, all processing in your browser. Ideal for branding documents, marking drafts, and protecting intellectual property.

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How to Use

  1. 1

    Upload PDF

    Upload the PDF to watermark.

  2. 2

    Set Watermark

    Enter text, adjust opacity, position, rotation, and font.

  3. 3

    Apply & Download

    Click Apply and download the watermarked PDF.

Frequently Asked Questions

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