Hash Length Extension Detector — Length Extension Attack

Detect vulnerable hashes (MD5, SHA-1) to length-extension. Security audit tool.

Hash Length Extension Detector: Detect vulnerable hashes (MD5, SHA-1) to length-extension. Security audit tool. Useful for checksums, content-addressed storage keys, and verifying that data wasn't modified in transit. Client-side only: close the tab and your input is gone. Nothing is transmitted. Part of HttpStatus.com's Hash developer tools.

Frequently Asked Questions

Is the hash from Hash Length Extension Detector 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.

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.

Does this work offline?

After the initial page load, yes — all processing is local. You need connectivity to load the page itself.

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