🔏HMAC Generator

Compute keyed HMAC signatures (SHA-1/256/384/512) for a message and secret via WebCrypto — the way webhooks (Stripe, GitHub) sign and verify payloads.

Input

MessageSecret key

Algorithm

HMAC-SHA256 · hex

Enter a message and secret.

Verify a webhook by recomputing the HMAC over the raw body with the shared secret and comparing (constant-time) to the signature header — e.g. Stripe's Stripe-Signature, GitHub's X-Hub-Signature-256. WebCrypto

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