Optimize & secure

Protect PDF

Lock your PDF with a password and control what readers can do with it.

Upload your PDF here, or click to browse

PDF
Enter a password above
🔒 Encryption happens entirely in your browser — your file never leaves your device.

About this tool

Secure your PDF documents by adding password encryption, restricting printing, and disabling copy permissions — entirely in your browser. Because PDFtone encrypts files locally, your password and your document never leave your device.

How to protect pdf

  1. Drop your PDF document into the security panel above.
  2. Set a strong password and choose permissions to restrict (e.g. printing or copying).
  3. Click Protect and download your newly secured PDF.

Common uses

  • Locking sensitive financial reports before emailing them.
  • Restricting editing on contracts or official forms.
  • Securing proprietary educational materials or artwork.

Frequently asked questions

What level of encryption is used?

The tool uses industry-standard 128-bit or 256-bit AES encryption to secure your document.

Can I undo the protection?

Yes, but only if you know the password you set. Keep it in a safe place.

Are my password and document sent to a server?

No. The password is cryptographically applied to the PDF locally in your browser.

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