SHA Hash Generator

Generate SHA-1, SHA-256 and SHA-512 hashes in the browser. No account, no upload, no limit.

Text to hash

Output appears here.

Computed with the Web Crypto API, locally. Hashes are one-way — you cannot reverse them.

Which algorithm to use

SHA-256 for anything new. SHA-1 is broken for collision resistance and should only be used to verify existing checksums. SHA-512 is faster on 64-bit hardware but produces a longer digest.

Hashing is not password storage

A plain hash is far too fast for passwords. Use a memory-hard algorithm — bcrypt, scrypt or Argon2 — with a per-user salt.

Checksums in practice

Compare the full digest, not a prefix. Truncated comparison is the classic way supply-chain tampering goes unnoticed.

Related free tools

This tool runs entirely in your browser using standard web APIs. There is no server component, so there is nothing to upload and nothing to log.