Protect PDF

Add password protection to a PDF online with Toolzin. Free, fast, and secure PDF encryption, no software install needed.

Protect PDF

Add password protection to a PDF — free, fast and secure.

or drag & drop your PDF here

Updated on 30 July 2026
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Protect a PDF for FREE

Our Protect PDF tool encrypts your PDF with AES-256 and a password of your choice, so only people who know the password can open it.

How It Works

  1. Upload your PDF, or paste a direct link to it.
  2. Choose a password.
  3. Download the password-protected PDF.

The process is 100% online and your files are removed from our servers shortly after conversion.

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