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Free online encryption and decryption tool supporting AES, TripleDES, Rabbit, and RC4 algorithms. Secure your text data with multiple cipher options.
Encrypts and decrypts text using symmetric algorithms: AES, TripleDES, Rabbit, and RC4. Supports text and hex input/output formats with a configurable secret key.
Understanding symmetric encryption is fundamental to security. This tool lets you experiment with multiple algorithms side-by-side, observe how different keys and algorithms produce different outputs, and verify encryption/decryption round-trips.
Developers learning about cryptography, security analysts examining encrypted payloads, and anyone needing quick symmetric encryption/decryption.
Choose Encrypt or Decrypt mode
Select an algorithm from the dropdown: AES, TripleDES, Rabbit, or RC4
Enter a secret key — both sides of encrypt/decrypt must use the same key
For encryption: type plaintext in the input area
For decryption: choose input format (Text or Hex) and paste the ciphertext
Choose output format (Hex or Text) and click the action button
Copy the result using the Copy button
Encrypt: algorithm=AES, key='my-secret', input='Hello World'. Output: hex string of the XOR-processed bytes.Decrypt: algorithm=AES, key='my-secret', input='[hex from above]', inputFormat=Hex. Output: 'Hello World'this uses simplified implementations for learning. Use established libraries like Web Crypto API for production.
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