Protect PDF — Password Protect PDF Instantly

Protect PDF files with AES-256 encryption. Password protect PDF documents online for free with our secure PDF password tool.

PDF files only

Max 100MB per file

Upload PDF to Protect with Password

Password Protect PDF • Lock PDF Free

Accepts PDF files only • Max size 100

Your Privacy Is Guaranteed

AES-256 encryption applied server-side
Files deleted immediately after processing
No data stored — zero third-party access