How to Protect a PDF with a Password

Password-protecting a PDF prevents unauthorized access to sensitive documents.

Doclair's Encrypt PDF tool uses AES-256 encryption — the same standard used by banks and governments.

Step 1: Open the Encrypt PDF tool and upload the PDF you want to protect.

Step 2: Enter a strong password. A combination of letters, numbers, and symbols is recommended.

Step 3: Optionally set permissions — restrict printing, copying text, or editing.

Step 4: Click "Encrypt PDF" and download the password-protected file.

What encryption standard is used? AES-256-bit encryption, which is industry standard.

What if I forget the password? There is no recovery mechanism. Store your password safely.

Will the encrypted PDF work in Adobe Reader? Yes. Compatible with all major PDF viewers.