How to Use the SHA-3 & Keccak-256 Cryptographic Hasher
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Type or paste text string, JSON, or Hex into the input box.
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Select algorithm: Keccak-256 (Ethereum/Solidity), SHA3-256, SHA3-384, or SHA3-512.
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Review computed cryptographic digest in real time.
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Copy 0x-prefixed hash or standard lowercase hex.
Practical Example & Use Case
Common Real-World Scenario
Verifying an Ethereum function selector `keccak256("transfer(address,uint256)")` for Solidity smart contract development.
Technical Notes & Limitations
Browser Engine Architecture
Executes pure client-side sponge construction Keccak permutations in browser memory.
Frequently Asked Questions
Is Keccak-256 the same as NIST SHA3-256?
Keccak-256 uses the original padding rule (0x01) used by Ethereum, whereas official NIST SHA3-256 uses 0x06 padding.