What's the difference between user and owner passwords?

A user password is required to open and view the PDF. An owner password allows you to set restrictions (like preventing printing or editing) while still allowing the PDF to be opened. This tool sets a user password.

How secure is the password protection?

The tool uses 128-bit encryption for password protection. The strength of protection depends on your password - use a strong, unique password for best security.

Is this tool free to use?

Yes! This tool is completely free with no hidden costs, subscriptions, or limitations. Use it as often as you need.

Absolutely. All encryption happens locally in your browser. Your PDF and password never leave your device and are not stored on any server.

Can I recover a forgotten password?

No, if you forget your password, the PDF cannot be recovered. Make sure to save your password in a secure location.

What's the maximum file size?

The tool accepts PDFs up to 100MB. Files larger than 50MB will show a warning as they may take longer to process, but will still work.

🔒 PDF Protect

Add password protection and encryption to PDFs

How It Works

Upload your PDF file
Set a strong password for protection
Choose permission settings (printing, copying, editing)
Tool encrypts the PDF with your password
Download the protected PDF - password will be required to open it
Browser-based processing - your files never leave your device

Important: Save your password securely! If you forget it, the PDF cannot be recovered.

Privacy: All encryption happens in your browser. Your password and PDF never leave your device.