Web3 & blockchain

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EVM unit conversion, Keccak-256 hashing and hex utilities for smart contract work, all offline.

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Convert between wei, gwei and ether with exact BigInt precision.

Compute Keccak-256 hashes and Solidity function selectors online.

Convert text to hexadecimal and hex back to readable text, UTF-8 aware.

Decode a raw signed Ethereum transaction and recover the sender address.

EVM Unit Converter converts between wei, gwei and ether values. Ethereum Transaction Decoder decodes a signed raw transaction to show what it actually does.