SHA-3-256
Future-proof SHA-3-256 hash algorithm replacing SHA-2 for enhanced security
SHA-3
Input Text
Hash Output
Enter text above to compute hash
Verify Hash
About SHA-3-256
Short explanation
SHA3-256 is a 256-bit hash from the SHA-3 family, based on the Keccak sponge construction. It is a modern alternative to SHA-2 with a different internal design and strong security margins.
Example input
protocol-message-v1Typical use
Use SHA3-256 when you want a NIST-standard 256-bit digest that is independent from SHA-2 internals.
When to use it
- New cryptographic designs that explicitly prefer SHA-3.
- Systems that want diversity from SHA-2 while keeping a standardized hash.
- Blockchain, protocol, or research contexts that already use Keccak or SHA-3-family primitives.
When not to use it
- Compatibility workflows that specifically require SHA-256.
- Variable-length output needs; use SHAKE128 or SHAKE256.
- Password hashing without memory-hard cost settings.
FAQ
Is SHA3-256 better than SHA-256?
It is not a direct upgrade for every case. SHA3-256 has a different design and strong margins, while SHA-256 has wider legacy compatibility.
Is SHA3-256 the same as Keccak-256?
No. They are closely related, but SHA3-256 and Keccak-256 use different padding and produce different digests.
How long is a SHA3-256 hash?
SHA3-256 outputs 256 bits, which is 32 bytes or 64 hexadecimal characters.
Algorithm Info