Password protect a PDF
Encrypt a PDF so it opens only with a password. AES-256 encryption runs right on your device.
- Free Converter
- No Registration
- No Uploads
Add files
Drop files anywhere on the page or paste them with Ctrl+V / ⌘+V
How it works
Add files
Add a PDF - the settings open.
Adjust the settings
Enter a password in the "Set a password on the PDF" field.
Download the result
Download the protected PDF.
Limitations
- Files up to 512 MB are supported; the actual limit also depends on the free memory of your device.
Frequently asked questions
How strong is the protection?
AES-256 is used - the strongest PDF encryption. Strength depends on the password: use a long and unique one.
Will a password-protected PDF open in regular apps?
Yes, Adobe Reader, browsers and other apps will ask for the password and open the document.