Protect PDF
Lock a PDF with a password.
Drop another PDF anywhere on this page, or
Thanks.Tell us why
Runs on your device. No upload wait.
What you get
- AES-256
- Permissions
Questions
What if I forget the password?
The PDF can’t be opened without it: that’s the point of AES-256 encryption, and nobody (including this site, which never sees it) can recover it. Keep the password somewhere safe, such as a password manager.
How strong should the password be?
Encryption is only as strong as the password. Use at least 12 characters, or several random words. The Password Generator can make one.
Do the printing and copying restrictions really work?
Adobe Reader, Chrome, Edge, Safari and most other viewers respect them, but they are rules the app follows, not a lock like the password to open. Some tools ignore them. To stop copying for real, don’t share the file, or redact what matters.
What is the permissions password?
A second password that lets its holder change the restrictions or remove the protection. If you leave it empty, a random one is used, so nobody can lift the restrictions without the document password removing them all.
Are my PDFs uploaded anywhere?
No. Your PDFs are opened and processed on your device, and the results are saved straight back to it. Nothing is uploaded. How to check.
Is it free? Do I need an account?
It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.
Missing something, or not working as it should? Tell us