๐Ÿ”‘HMAC Generator

Generate HMAC signatures with a secret key

About the HMAC Generator

HMAC Generator computes keyed hash signatures (HMAC) using a secret key with SHA-256, SHA-1, SHA-512, or MD5.

HMAC is used to verify message authenticity and integrity, such as signing webhooks and API requests. It runs locally for privacy.

Common use cases

  • Signing or verifying webhook payloads
  • Generating API request signatures
  • Testing HMAC implementations
  • Validating message integrity with a shared secret

How to use the HMAC Generator

  1. Enter the message and your secret key.
  2. Choose the hash algorithm.
  3. Copy the resulting HMAC signature.

Frequently asked questions

How is HMAC different from a plain hash?

HMAC mixes in a secret key, so only someone with the key can produce or verify the signature.

Which algorithm is recommended?

HMAC-SHA256 is the common, secure default.

Is my secret safe?

Yes, the HMAC is computed locally and the secret is never transmitted.