Browser-only — no server processing

HMAC Generator

Generate HMAC signatures using SHA-1, SHA-256, or SHA-512 — entirely in your browser via the Web Crypto API. Paste your message, enter a secret key, and get a cryptographic signature instantly.

HMAC-SHA-1HMAC-SHA-256HMAC-SHA-512

Web Crypto API

Uses crypto.subtle.importKey and crypto.subtle.sign — native browser cryptography.

Configuration

Set up your HMAC.

Message

Algorithm

Secret Key

Output

HMAC signature.

Your HMAC signature will appear here.

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