Smart Contract
Free browser-based Smart Contract tools.
ABI Encoder
Encode function calls (ABI)
ABI Decoder
Decode ABI-encoded data
Function Signature Generator
Generate 4-byte selectors
Event Topic Hash Generator
Generate event topic0 hashes
Keccak-256 Hash Tool
Compute keccak-256 hashes
EVM Opcode Reference Browser
Browse EVM opcodes
Solidity Function Selector Database
Lookup function selectors
Contract ABI Formatter
Pretty-print JSON ABIs
ABI to TypeScript Type Generator
Generate TS types from ABI
Smart Contract Event Log Decoder
Decode event logs manually
ERC-20 Token Spec Reference
ERC-20 reference
ERC-721 Token Spec Reference
ERC-721 reference
ERC-1155 Token Spec Reference
ERC-1155 reference
EIP Reference Browser
Browse EIPs
Contract Bytecode Inspector
Inspect bytecode basics
Storage Slot Calculator
Coming soon
Proxy Pattern Reference
Coming soon
Reentrancy Pattern Checker
Coming soon
Constructor Argument Decoder
Coming soon
Solidity Version Compatibility Matrix
Coming soon