HMAC Online Calculator

Input

Result (HEX) Result (Base64)

What is HMAC?

HMAC uses a hash function and secret key to produce a message authentication code for integrity and authenticity verification.

Multiple algorithms: MD5, RIPEMD160, SHA1, SHA224, SHA256, SHA384, SHA512, SHA3.
Flexible input: String, Hex, or Base64 for message and key.
Charset encoding for text inputs.
Dual output: HEX and Base64 with case toggle.
Local processing.