Password Protect PDF

Drag and drop a file here, or click to select

Minimum 6 characters. We cannot recover your password if you forget it.

About PDF Encryption

This tool uses AES-256-GCM encryption for the entire PDF file, which provides stronger security than native PDF password protection. The output is an encrypted package (.isf) that must be decrypted using the Decrypt File tool before viewing.

Security Features

  • • Military-grade AES-256-GCM encryption
  • • PBKDF2 key derivation for password protection
  • • 100% browser-based - your PDF never leaves your device