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FizzKit

HMAC Generator

Generate HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 signatures. Used to sign webhooks, API requests, and JWTs.

Runs locally in your browser
Message
0 chars · 1 line
HMAC signature
—
Secret
0 B
Message
0 B
Algorithm
SHA-256
Digest
hex

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About HMAC Generator

Generate HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512 signatures. Used to sign webhooks, API requests, and JWTs.

HMAC Generator is part of FizzKit — a collection of focused, browser-based tools. Because everything runs locally, it works offline once loaded and never exposes your data to a remote server.

Frequently asked questions

Verifying both the integrity and authenticity of a message. If you share a secret with the sender, an HMAC proves the message came from them and was not tampered with.