HMAC generator

Compute HMAC-SHA-256/384/512 locally from a message and key. UTF-8 or hexadecimal key, up to 4096 bytes. This does not verify JWTs.

Inputs stay in this page. Nothing is uploaded or saved automatically.

AlgorithmKey formatKey

Input

Text and binary input: 1 MiB maximum; JSON: 1 MB, 200 levels, tree/diff: 10,000 nodes per input.