Protect PDF
Lock a PDF with a password.
Lock a PDF with a password. Runs entirely in your browser — your files never leave your device. Free, no sign-up, no watermark.
Frequently asked questions
What encryption is used?
It sets a password using PDF AES encryption — the file can't be opened without it.
Is it done on a server?
No — encryption happens in your browser, so the password and file never leave your device.
What if I forget the password?
It can't be recovered — keep it safe, as this is real encryption.