A versatile and secure command-line utility for encrypting and decrypting files of various formats using the Fernet symmetric encryption algorithm.

• 🔒 Strong Encryption & Decryption
  Securely encrypt and decrypt any file with the powerful Fernet encryption algorithm.

• 📂 Multi-format Support
  Works with a wide range of file types — including .mp3, .jpeg, .png, .txt, and more.

• 🛠 Command-Line Interface
  Simple, script-friendly CLI design for quick use and seamless automation in your workflows.

• 📁 Flexible I/O Options
  Easily specify input and output paths to maintain full control over where your files go.

This tool uses Fernet encryption provided by the cryptography Python package. Fernet guarantees that a message encrypted using it cannot be manipulated or read without the key.

Make sure you have Python installed. Then, install the required package:

pip install cryptography

python encrypt_decrypt_tool.py encrypt input_file [--output_file OUTPUT_FILE]

python encrypt_decrypt_tool.py decrypt input_file [--output_file OUTPUT_FILE]

python encrypt_decrypt_tool.py encrypt secret.txt --output_file secret.encrypted
python encrypt_decrypt_tool.py decrypt secret.encrypted --output_file secret_decrypted.txt

• Text files (.txt)
• Audio files (.mp3)
• Image files (.jpeg, .png)
• And virtually any other file type

Fernet is part of the Python cryptography library and ensures:

• Secure symmetric encryption (AES in CBC mode with a SHA256 HMAC)
• Time-based token validity (optional)
• Easy key management and sharing

This project is licensed under the MIT License.

Built with ❤️ using Python and cryptography.