Web3 Tools

ABI Encoder / Decoder

Encode and decode Ethereum ABI data for smart contract function calls.

Function Signature

Selector: 0xa9059cbb · 2 parameter(s)

Encoded Data
0xa9059cbb0000000000000000000000001234567890abcdef1234567890abcdef123456780000000000000000000000000000000000000000000000000de0b6b3a7640000

68 bytes

ABI Encoder / Decoder: Encode and decode Ethereum ABI data for smart contract function calls. Runs entirely in your browser — paste your input, get instant output, nothing is uploaded.

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🔒 This tool runs entirely in your browser. No data is sent to any server.