Password Protect PDF Online for Free

Add password protection to your PDF files to prevent unauthorized access. Set a password and download the encrypted file. Everything happens in your browser — your password and files are never transmitted.

How to Use This Tool

  1. Upload your PDF file
  2. Set a password
  3. Click Protect and download the encrypted PDF

Frequently Asked Questions

How strong is the encryption?

PDFs use standard PDF encryption, which provides adequate protection against casual access.

Is my password stored anywhere?

No. Your password is used only during encryption in your browser and is never transmitted or stored.

Your files are processed in your browser and never uploaded to any server. Free, no sign-up, no limits.