HMAC Generator
Hash & Tokens
Generate HMAC signatures from a message and shared secret.
Parameters
Input
Output
Auto-calculate
0 characters · 0 bytesUse cases
When to use HMAC Generator
Generate HMAC signatures from a message and shared secret.
1Reproduce a webhook signature locally
2Compare request-body integrity checks
3Debug a server integration that uses a shared secret
4Reproduce signature flows used by webhooks, API gateways, and third-party services
5Compare JWT claims, digest algorithms, and secret encoding across systems
6Prepare redacted but reproducible token examples for security review
Guidance
Get reliable results
- 1Use the same hash algorithm as the receiver
- 2Use the same key encoding on both sides
- 3Compare production digests with a constant-time routine
Browser-side HMAC reduces the need to send values to a server, but production keys still require secure rotation and storage.