🔐 Secure File Tool

🔐 Secure File Tool

Encrypt and decrypt files entirely in your browser.
Uses AES-GCM encryption with PBKDF2 key derivation. Files never leave your device.

📝 Encrypt a File🔑 Decrypt a File

🛠 How It Works

  1. Select a file and enter a passphrase.
  2. The passphrase is converted into a secure key using PBKDF2 (SHA-256) with a random salt and IV.
  3. The encrypted file includes a header, salt, IV, and original file details (name & type).
  4. To decrypt, upload the file and use the same passphrase. If correct, your original file is restored.

💡 Tips & Security Notes

  • Use a strong, unique passphrase for each file.
  • Keep a backup of your passphrase—without it, files cannot be decrypted.
  • Encrypted files are safe to share, as decryption requires your passphrase.
  • All processing happens on your device; no data is uploaded to any server.