Protect PDF

Add password protection to your PDF documents with strong encryption. Anyone who tries to open the protected PDF will need to enter the correct password. Process multiple files at once with the same password.

How to Password-Protect a PDF in Three Steps

Upload your PDF — click "Select PDFs" or drag and drop.
Set a password — enter and confirm your password.
Download — save your encrypted PDF.

The Best Free PDF Encryption Tool

Why Password-Protect a PDF?

What encryption does it use?

The tool uses industry-standard encryption to secure your PDF with the password you choose.

Can I protect multiple PDFs with the same password?

Yes. Upload multiple files and they will all be encrypted with the same password.

Can the password be removed later?

Yes. Use the Unlock PDF tool to remove password protection if you know the password.

Will protection change the PDF content?

No. The content remains exactly the same — only access is restricted by the password.

Is the password stored anywhere?

No. Your password is never stored or sent anywhere.

Last updated: 2026-06-08