Générateur HMAC
Générateur HMAC gratuit. Créez des signatures HMAC avec SHA-1, 256, 384 ou 512 et n'importe quel secret. Sortie Hex et Base64. Pour la signature de webhook, l'authentification API.
Runs in your browserUpdated Apr 26, 2026
Input
Output
Hex
Base64
Questions fréquentes
›What is HMAC?
Hash-based Message Authentication Code — a way to verify a message hasn't been tampered with using a shared secret. Common in webhook signing.
›Is HMAC encryption?
No — HMAC is authentication. The message itself is in cleartext; HMAC just lets the receiver verify it came from someone with the same secret.
›Which algorithm should I use?
HMAC-SHA256 is the modern default. HMAC-SHA1 is still common in older systems but should be avoided for new work.
›Is my secret sent to a server?
No — generation runs entirely in your browser via the Web Crypto API.
›Is the generator free?
Yes — fully free, no signup.