ABI & calldata
Decode Ethereum / EVM transaction calldata. The function is detected automatically from its selector, or paste a signature or ABI. Arrays, tuples and bytes included.
runs in your browserpaste calldata above, or tap an example. it decodes as you paste.
4-byte function selector, then the arguments abi-encoded in 32-byte words. static values sit inline; dynamic ones (bytes, string, arrays) are an offset pointing further down where the length and data live.
the "input data" field on a block explorer, tx.data in viem / ethers, or cast tx <hash> input.
the function was never registered in the public signature databases. paste its signature or the contract abi (from the verified source or your build output) and it decodes locally.
