A cryptographic hash turns any input into a fixed-length string that is practically impossible to reverse. The same input always gives the same hash; a tiny change gives a completely different one. This tool computes MD5, SHA-1, SHA-256 and SHA-512 digests in real time, in your browser.
How to use it
- Type or paste your text.
- All digests compute instantly.
- Each algorithm has its own row.
- Click Copy next to any hash.
About Hash Generator
Hashes verify data integrity, fingerprint files, build cache keys, and (with salting) store passwords. SHA-256 and SHA-512 are secure for integrity checks today. MD5 and SHA-1 are broken for security but remain useful as fast non-security checksums. Use this to confirm a download matches a published checksum, derive a deterministic identifier, or simply see what a hash looks like. Hashing uses the browser Web Crypto API plus a pure-JS MD5, so input never leaves your device.
FAQ
Can I reverse a hash?
No. Hashes are one-way. The only way to reverse one is to guess inputs until one matches — which is why long unique inputs are secure.
Should I use MD5 for passwords?
No. MD5 and SHA-1 are broken for security. For passwords use bcrypt, scrypt or Argon2 with a unique salt.
Is my input sent anywhere?
No. Hashing runs entirely in your browser.