Algorithm reference
Keccak-256 hash calculator
Keccak-256 is the original Keccak padding variant and is not byte-for-byte interchangeable with standardized SHA-3.
Modern, protocol-specific
256-bit output
64 hex characters
Digest calculator
Text to hash
Never enter a real account password or any other secret. Submitted text is processed by the server, but never placed in the URL, logs, analytics, or ads.
Practical guidance
About Keccak-256
Protocols such as Ethereum and other systems that explicitly specify Keccak.
Collision resistance
No practical collision is publicly known for the full algorithm.