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HMAC Generator (SHA)

Compute HMAC-SHA1/256/384/512 online with WebCrypto. Hex or Base64 output for webhooks and API signatures.

HMAC generator (SHA-1/256/384/512)

WebCrypto HMAC, computed locally. Real secrets belong in servers, not browsers.

Signature

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How to use

  1. Paste message, type secret key.
  2. Pick SHA variant and hex/base64 output.
  3. Copy the signature for webhooks or APIs.

FAQ

HMAC vs plain hash?

HMAC mixes in a secret key — recipients with the key can verify, others can't forge.

Key safety?

Computed locally, but real signing keys belong on servers, never in browsers.

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