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Robert Askam

HMAC-SHA1 Generator

Create HMAC-SHA1 signatures, as used by OAuth 1.0, TOTP codes and many webhook providers. Key as text or HEX; output as HEX or Base64.

How to use it

Type the secret key and message. For OAuth 1.0 signatures choose Base64 output. A TOTP secret is Base32, so convert it to HEX first and set the key format to HEX.