Password Protect PDF — 100% Private

Encrypt your PDF with a password. Processed on your device.

How it works

Upload PDF — Select the PDF to protect
Enter Password — Choose a password (minimum 4 characters)
Download — Save your password-protected PDF

FAQ

Do you upload my PDF when adding a password?

No. Encryption runs in your browser.

What if I forget the password?

We cannot recover passwords. Store your password safely before sharing the file.

Can I unlock a PDF here?

This tool adds protection only. Remove passwords with the app that created the lock.

PDF tools

JavaScript is required to use the tool. Enable JS or open www.mergepdf.in.