Security Tools

HMAC Generator

Create secure Hash-based Message Authentication Codes instantly. Supports all standard algorithms (SHA256, SHA512, MD5).

Algorithm

Secret Key

Message Payload

Calculated Signature (HMAC)

Enter message and key to verify signature...

Uses standard algorithms (SHA-256, SHA-512) to verify data integrity and authenticity without exposing the key.

Your secret key is processed entirely in your browser. It is never sent to any server.

Perfect for debugging API webhooks, payment gateway signatures (Stripe, PayPal), and JWTs.