Protect PDF
Lock a PDF with a password — AES-256, with optional print and copy restrictions.
- Processed locally — your files never leave your device
- Free, no sign-up
- No file limits
How to use Protect PDF
- 1
Drop a PDF.
- 2
Type and confirm a password; optionally block printing or copying.
- 3
Download the protected PDF.
Features
- AES-256The strongest standard PDF encryption.
- RestrictionsBlock printing, copying or editing in compliant readers.
- Never uploadedEncryption runs locally — your document and password stay with you.
Frequently asked questions
What if I forget the password?
It can't be recovered — AES-256 is designed to be unbreakable. Keep a copy of the original.
Is my password sent anywhere?
No. The password and file never leave your browser.
Is it free?
Yes.