Lock PDF
Password protect your PDF and restrict what others can do with it.
Drop your PDF here
or click to select from your computer
Select PDF File
🔒 File stays in your browser — never uploaded
Password Settings
If set, readers must enter this to open the file.
Controls permissions (printing, editing, copying).
Restrict Permissions
ℹ️ PDF encryption uses 128-bit RC4 via pdf-lib. For maximum compatibility set both passwords. All processing happens locally — passwords are never sent anywhere.
Encrypting…