A client-side, installable file integrity checker. Drop a file, pick an algorithm, paste the hash you were given, and HashSentinel tells you if it's a match all computed locally in your browser sandbox. No upload, no backend, no tracking.
javascript hashing cryptography privacy pwa offline-first checksum hash md5 sha256 client-side sha3 sha512 web-crypto privacy-tools file-integrity file-security file-verification webcryptography download-verification
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Updated
Aug 9, 2026 - JavaScript