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Protect PDF

Protect your PDF files with a password. Prevent unauthorized access to confidential documents. Encryption happens securely in your browser.

Note: Browser-based PDF encryption has limitations. For production use, consider a server-side solution.

Upload PDF
Select a PDF to protect
How to use
  1. 1Upload your PDF
  2. 2Choose a password
  3. 3Download the protected PDF
  4. 44. Download the protected PDF
Features
  • Password Protect PDF

    Adds password protection to PDF files.

  • Strong Encryption

    Uses AES-256 encryption for maximum security.

  • Set Permissions

    Define: allow/deny printing, copying, editing.

  • Compatibility

    Works with all PDF readers (Adobe, Chrome, etc.).

FAQ

How secure is the encryption?

We use AES-256, the same standard used by banks and military.

Can I change the password later?

No, you need to unlock the PDF and protect it again with a new password.

What's the difference between user and owner password?

User password opens the PDF, owner password additionally allows permission changes.

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Note: All processing happens in your browser. Your files are not uploaded to any server.