RC4 Encrypt/Decrypt

Online RC4 and RC4Drop encryption and decryption tool. RC4 is a stream cipher known for its simplicity and speed.

Secret Key (Password)

Drop Bytes (Optional)

Plaintext (Message)

Ciphertext (Base64)

What is RC4?

RC4 (Rivest Cipher 4) is a stream cipher. While it is remarkable for its simplicity and speed in software, multiple vulnerabilities have been discovered in RC4, making it insecure for most modern uses.

Security Note

RC4 is no longer considered secure. It has been prohibited from use in TLS (HTTPS) and other secure protocols. It is provided here for legacy support and educational purposes only.