HMAC Generator
Enter a message and a secret key to instantly generate an HMAC signature.
Pourquoi utiliser cet outil ?
HMAC signatures are used to verify the authenticity of API requests and webhooks. This tool computes an HMAC directly in your browser using the native Web Crypto API, so your secret key never leaves your device.
Why it's free
A discreet ad banner covers hosting costs — that's the whole business model. No account to create, no usage limit, no paid tier unlocking the real result. Calculations run in your browser, so your numbers, dates and text never leave your device.
How our tools work