Password Protect PDF Online for Free
Password Protect PDF – Encrypt PDF Free Online
Sensitive documents need protection. This tool adds password encryption to your PDF so only people with the password can open, print, or copy it. Choose between a simple open password or advanced permission controls. Everything happens in your browser — your password is never stored.
PDF Encryption with AES 128/256-Bit Security
The tool uses industry-standard AES encryption to lock your PDF. You can restrict opening, printing, copying, and editing independently. Once encrypted, the password is required every time someone tries to access the document.
How it works
Upload your PDF
Drag and drop your PDF file or click to browse.
Set your password
Enter a strong password. Optionally set separate permissions for printing and editing.
Download protected PDF
Click Protect and download your encrypted PDF file.
Frequently asked questions
About Protect PDF
Protect PDF adds password encryption to your documents. Set an open password to restrict access, or a permissions password to control printing and editing. Uses secure AES-256 encryption.