Generate SHA3-256 hashes online. SHA3-256 is the 256-bit FIPS 202 hash based on the Keccak sponge, a modern drop-in alternative to SHA-256.
SHA3-256 is the most widely used fixed-length SHA-3 function, producing a 256-bit (64 hex character) digest. Standardized in FIPS 202, it is built on the Keccak sponge construction and was selected through NIST's public SHA-3 competition. It offers the same 256-bit security target as SHA-256 but with a completely different internal design, making it a strong independent alternative for integrity, commitments, and protocol use.
Input:
abc
Output:
3a985da74fe225b2045c172d6bd390bd855f086e3e9d525b46bfe24511431532
What is the difference between SHA3-256 and Keccak-256?
Only the padding/domain suffix. SHA3-256 (FIPS 202) appends 01 before padding; Keccak-256 (the original submission, used by Ethereum) does not. Same input, different output.
Is SHA3-256 stronger than SHA-256?
They target the same 256-bit security level. SHA3-256's value is structural diversity and built-in length-extension resistance, not raw strength.
How long is a SHA3-256 hash?
256 bits, or 64 hexadecimal characters.
Create SHA3-256 hashes with the Keccak-based SHA-3 cryptographic standard for high security.
Supported Tools: