Add a password to a PDF.
Adjust settings to match exactly what you need
Files are never uploaded to a server — processed in your browser
No limits, no payment, ever
Choose the PDF you want to lock.
Type a password you will remember — it cannot be recovered.
The PDF is encrypted with standard 128-bit PDF encryption.
Anyone opening the file will be asked for the password.
Protect PDF adds an open password to a PDF so only people you share the password with can read it.
No. The password is never sent anywhere, so keep it safe.
Because it is locked — that shows the protection works. Open the download with your password.
No. The tool runs entirely in your browser, so your file never leaves your device and nothing is stored on our side.