Web3 Tools

Free online web3 tools for developers.

Wallet Address Validator

Validate Ethereum, Bitcoin, and Solana wallet addresses

Gas Fee Calculator

Calculate Ethereum gas fees in Gwei, ETH, and USD

ABI Encoder/Decoder

Encode and decode Ethereum smart contract ABI calls

Keccak-256 Hash

Calculate Keccak-256 hashes and Solidity function selectors

Base58 Converter

Encode and decode Base58 and Base58Check (Bitcoin format)

Token Unit Converter

Convert between wei, gwei, and ether with custom decimals

Merkle Tree Generator

Build Merkle trees, generate and verify proofs

Blockchain Timestamp

Convert between block numbers and timestamps for EVM chains

EVM Bytecode Viewer

Disassemble EVM bytecode into human-readable opcodes

ETH Address Toolkit

EIP-55 checksum conversion, validation, and vanity analysis

Other Categories

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