Is HMAC Generator free?

Yes, HMAC Generator is completely free to use with no signup required.

Does HMAC Generator send my data to a server?

No. HMAC Generator runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

Calculate Hash-based Message Authentication Codes (HMAC) with SHA-256, SHA-384, or SHA-512 in your browser privately.

DevTab

Never leaves your browser

Generate hash-based message authentication codes (HMAC) using standard SHA algorithms client-side.

Secret Key

Signing Algorithm

Payload Message text

Generated HMAC Signature (Hex)

Awaiting Secret Key