Protect PDF — Add a Password to PDF

Secure confidential PDFs with strong 256-bit AES password encryption before emailing or sharing them.

How to use Protect PDF

  1. Upload a PDF
  2. Choose a strong password
  3. Download the encrypted PDF

Frequently asked questions

What encryption is used?

PDFs are encrypted with 256-bit AES, the strongest standard PDF encryption.

What if I forget the password?

We never store passwords, so keep it safe — a forgotten password cannot be recovered.

Will the PDF open on any device?

Yes. Any modern PDF reader will ask for the password and open the file.