Lock with a password
Only people with the password can open it.
Free to use. No sign-up. Your files never leave your device.
How it works
- Choose the PDF you want to lock.
- Type a password, twice.
- Press "Lock this PDF" and save it. Nobody can open it without the password.
Questions people ask
What if I forget the password?
Then the PDF cannot be opened by anyone, including us. Write the password down somewhere safe.
How strong is the lock?
It uses AES-256, the strongest locking that PDFs support.