Hash Generator

A hash is the result of a one-way function: a string produces a fixed fingerprint (for example, 64 hex characters for SHA-256). The same input always produces the same hash. Hashes are used to check integrity, passwords, and signatures.

SHA-256 produces 256 bits (64 hex characters), while SHA-512 produces 512 bits (128 characters). SHA-512 is faster on 64-bit systems; SHA-256 is more common in protocols and certificates. Both are considered cryptographically secure.

No. Hash functions are one-way. You can’t recover the original data from a hash. That’s why password hashes, rather than passwords, are stored in a database.

Check a file or string checksum, generate a fingerprint for an API, or compare a password with a stored hash (on the server). Local calculation does not expose data.

The calculation runs locally; no data is sent. For a real password check, the hash must be calculated on a server with a salt — this tool only shows what a string's hash looks like.