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HMAC-SHA Signature Generator

Hashing • 100% Client-Side Processing

Cryptographic HMAC generator. Sign messages and API webhooks (GitHub, Stripe, AWS) using secret keys with SHA-256, SHA-512, SHA-384, or SHA-1.

Privacy First: HMAC-SHA Signature Generator executes 100% locally in your web browser. No inputs or generated outputs leave your device.

Tool Chaining — Continue Workflow

Take your result from HMAC-SHA Signature Generator directly into companion utilities:

Multi-Algorithm Hash GeneratorAPI Key & Bearer Token GeneratorSHA-256 Hash Calculator

How to Use

  1. Enter message payload in the Message area.
  2. Enter secret signing key in the Secret Key input.
  3. Choose algorithm (SHA-256, SHA-512, SHA-1).
  4. Copy the generated HMAC hex signature.

Key Features

  • •Web Crypto crypto.subtle.sign("HMAC")
  • •Supports SHA-256, SHA-512, SHA-384, SHA-1
  • •Keys never leave your browser

Technical Scope & Limitations

  • • Both parties must agree on the secret key and encoding (hex).