MD5 · SHA · CRC32 · HMAC — văn bản & tệp
🔏 Hash & Checksum
Hash text as you type, or drop in a file to verify its checksum — MD5, SHA-1/256/384/512, CRC32 and HMAC. Nothing ever leaves your browser.
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MD5 and SHA-1 are broken for security (collisions exist) — fine for checksums, never for passwords. HMAC applies to the SHA family (per RFC 2104; WebCrypto). CRC32 (IEEE, as in ZIP/PNG) is an error-detecting checksum, not cryptographic. Verify vectors: MD5(“”) = d41d8cd9…, SHA-256(“abc”) = ba7816bf….