What This Tool Does

It adds password encryption to your PDF. Once protected, the file requires the password to open. Anyone who tries to open the PDF without the password will be blocked by their PDF viewer.

The encryption happens in your browser. Your file is not sent to any server during this process.

How to Use It

• Click Choose PDF and select your file.
• Type a password in the input field.
• Click Protect PDF.
• Download the encrypted file.
• Keep the password stored safely there is no recovery option built into PDF encryption.

Common Uses

• Protecting sensitive documents before sharing by email
• Adding a password to financial or legal PDFs before sending to clients
• Securing personal documents stored in shared cloud folders
• Locking confidential reports so only intended recipients can open them

Frequently Asked Questions

What happens if I forget the password?

There is no recovery option. PDF encryption does not have a master key. Store your password in a password manager or somewhere safe before closing the browser tab.

Will the protected PDF open on any device?

Yes. Any standard PDF viewer Adobe Reader, Preview, Chrome, mobile PDF apps will ask for the password before opening the file.

How strong is the encryption?

The PDF is encrypted using standard PDF encryption. For high-security requirements like legal or financial compliance, consult the specific security standards required in your industry.

Can I remove the password later?

Yes. Use the Unlock PDF tool on this site. Enter the current password and download an unprotected version.