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Protect PDF with Password Online Free — PrivaTools

Password protect PDF online for free — encrypt your PDF with AES-256 encryption. Set open passwords, permission passwords, and control printing, copying, and editing access.

Protect PDF with Password is one of 105 free file tools on PrivaTools. All processing happens on our servers with zero-knowledge architecture — your files are never stored, never read, and never shared with third parties. No account required.

How to Protect PDF with Password with PrivaTools

  1. Upload the PDF — Select a PDF up to 500 MB that you want to password-protect.
  2. Set a password — Enter a strong password. You can separately restrict printing, copying text, or editing.
  3. Download the encrypted PDF — Click Protect. The output uses AES-256 encryption and requires the password to open.

Frequently Asked Questions

What encryption does PrivaTools use?

PDFs are encrypted with AES-256, the same standard used by banks and governments. This is the strongest encryption available for PDF files.

Can I allow printing but block copying text?

Yes. You can set granular permissions: allow or deny printing, text copying, form filling, and editing independently.

What happens if I forget the password?

PrivaTools does not store your password. If you lose it, there is no way to recover it. Save your password in a password manager.

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