Sign with a secret using Web Crypto — nothing is uploaded.
Sign with a secret. Stay local.
Runs in your browser. Message and secret never leave this device.
Sign with a secret using Web Crypto — nothing is uploaded.
Compute HMAC-SHA1 through HMAC-SHA512 of a message and secret with Web Crypto. Useful for webhook signatures and API auth checks — free, no account, nothing uploaded.
No. Signing uses the Web Crypto API in this browser. Bento Tools does not send your payload or secret to a server.
Both the message and secret are treated as UTF-8 text. Output can be lowercase hex or standard Base64.
No. HMAC is for keyed message authentication. For storing passwords, use a dedicated password hash such as argon2 or bcrypt.
Yes. It is a free Bento Tools utility with no account required.