This is a simple web-based encryption/decryption tool that allows you to encrypt and decrypt messages using a key.

1. Encrypt messages using a key
2. Decrypt encrypted messages using the same key

1. Go to 3kh0.github.io/echocrypt
2. Enter a key in the "Key" field
3. Enter a message in the "Message" field
4. Click the "Encrypt" button to encrypt the message
5. Click the "Decrypt" button to decrypt the encrypted message

This tool is intended for educational purposes only and is not suitable for secure encryption in real-world applications.

This tool is open source and contributions are welcome! If you would like to contribute, please open a pull request with your changes.