🧩 ABI Encoder / Decoder

Encode function calls and parameters to calldata, or decode calldata with a signature or JSON ABI.

Function signature, or a parameter list like (address,uint256[])

Numbers: decimal or 0x hex. Bytes: 0x hex. Arrays and tuples: JSON, e.g. ["0x…", "5"].

Calldata

Function signature(s) or JSON ABI (optional)

Data has no selector (only encoded parameters)

Arguments as JSON