Hash Generator (MD5 / SHA-1 / SHA-256 / SHA-512)

Security Client-side hash md5 sha1 sha256 sha512 checksum crypto

This tool runs entirely client-side, in your browser: your data is never sent anywhere.

What it does

Computes cryptographic hash digests (MD5, SHA-1, SHA-256, SHA-512) of any text you provide. Useful for checking file/data integrity, generating checksums, or comparing values quickly.

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How it works

SHA-1 / SHA-256 / SHA-512 are computed using the browser's native SubtleCrypto API (crypto.subtle.digest), which is fast and cryptographically sound.
MD5 is not available in SubtleCrypto (it's considered insecure), so a compact pure-JavaScript implementation is included instead. MD5 is provided here only for legacy compatibility checks (e.g. verifying old checksums), not for security purposes.
All hashes are computed locally in your browser — nothing is sent to any server.

Notes

Input is UTF-8 encoded before hashing, so results match standard tools like md5sum, sha1sum, sha256sum, sha512sum on the equivalent bytes.
Hashes are displayed in lowercase hexadecimal.