Security
HMAC Generator
Use an HMAC generator to sign text with a shared secret, create webhook signatures, and produce hex or base64 digests in the browser.
HMAC input
Enter a message and secret key to generate an HMAC digest in the browser.
HMAC output
Review the digest and copy the exact signature you need for a request or webhook check.
Why use an HMAC generator
An HMAC generator helps you create message authentication codes for APIs, signed requests, webhook payloads, and security checks. It is useful when you need an HMAC hash without setting up a script or command line tool.
That makes the page useful for searches like HMAC generator, HMAC SHA256 generator, HMAC SHA512 generator, and message authentication code generator because it focuses on the signed output directly in the browser.
Generate HMAC hashes with a secret key
Enter a message, add a secret key, choose the hash algorithm, and the HMAC output updates automatically. The generator supports the most common HMAC algorithms so you can compare output formats quickly.
This is helpful when you are signing API requests, validating webhook signatures, or testing how different HMAC algorithms change the resulting digest.
Common HMAC generator use cases
Use an HMAC generator when you need to verify a webhook payload, sign a request body, compare shared-secret digests, or document how a signature was produced. It is a practical browser-based HMAC hash generator for developer workflows.
Because the tool runs locally in the browser, you can test sample payloads and copy the exact HMAC value without sending the secret to a server.
FAQ
What does an HMAC generator do?
It combines a message and a secret key to produce a hash used for authentication and integrity checks.
Which algorithms are supported?
This HMAC generator supports HMAC-SHA1, HMAC-SHA256, HMAC-SHA384, and HMAC-SHA512.
Can I use it for webhook signatures?
Yes. It is useful for comparing or generating webhook signatures that depend on a shared secret.
Does the secret leave my browser?
No. The signature is generated locally in the browser and the secret does not need to be sent anywhere else.
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