HMAC Generator — HMAC-SHA256, HMAC-MD5 Online

Compute HMAC with secret key. SHA-256, MD5, SHA-1. Message authentication codes.

HMAC Generator: Compute HMAC with secret key. SHA-256, MD5, SHA-1. Message authentication codes. Useful for checksums, content-addressed storage keys, and verifying that data wasn't modified in transit. Your input stays in your browser's memory and is discarded when you navigate away. A free Hash tool on HttpStatus.com — no installation needed.

Frequently Asked Questions

Is the hash from HMAC Generator suitable for password storage?

Standard hashes (MD5, SHA) are not suitable for passwords — use bcrypt or Argon2 instead. These hashes are for integrity checks and fingerprinting.

What's the size limit for input?

Client-side tools use your device's memory, so they handle up to several megabytes. Very large inputs may slow the tab.

Why use a browser tool instead of the command line?

No installation, works on any device, and results are shareable via URL. CLI tools are still better for CI/CD pipelines.

Is my input collected for analytics?

No — client-side tools don't transmit your input. Standard page-view analytics may run, but your data is never included.

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