PDF tool · Free
Protect PDF
Add a password and (AES) encryption to your PDF.
100% in your browser — your password and file never leave your device
Drop your PDF here or click to choose
PDF files only
Frequently asked questions
Is my password sent to a server?
No. Encryption happens in your browser — nothing (not even the password) leaves your device.
Which encryption is used?
AES-128, a solid standard compatible with PDF readers.
What if I forget the password?
There’s no way to recover it — keep it safe.