Step by step
- 01
Select an unprotected PDF
If the document is already protected, unlock it with the existing password first.
- 02
Enter and confirm a password
Use at least four characters and enter the same password in both fields. Prefer a longer, hard-to-guess password.
- 03
Download the protected copy
Run protection and open the downloaded PDF to confirm that it asks for your password. Share the password separately from the document.
Settings
- Password
- The current tool uses AES-256 encryption. The visibility control helps you check your entry; the confirmation must match.
Help and limitations
Can you recover my password?
No. Keep your original file and password in a safe place.
Does this add a watermark?
No. Password protection controls opening the file. Use Watermark PDF for a visible text label.
Before you use the output
Password protection is not a certificate-based signature or a guarantee about how an authorized recipient uses the document.
WEB / PDF
Put the guide into practice.
Open the real web tool to select your files and process your document locally.