HMAC Calculator
Generate HMAC signatures for webhook payload verification. Supports SHA-256, SHA-1, SHA-384, and SHA-512 with hex or base64 encoding.
How HMAC Webhook Verification Works
- The webhook provider signs the payload using a shared secret
- The signature is sent in an HTTP header (e.g.,
X-Hub-Signature-256) - You recompute the HMAC using the same secret and payload
- Compare your computed signature with the received one
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