Free Ethereum ABI Decoder
Decode Ethereum smart contract call data using an ABI JSON. Parse function selectors, decode uint256, address, bool, string, and bytes32 parameters.
Ethereum ABI Decoder
Decode Ethereum transaction calldata using ABI definitions. Inspect function calls and parameter values.
ABI JSON
Frequently Asked Questions
What parameter types can be decoded?
uint256, address, bool, string, and bytes32. Dynamic types (arrays, tuples) require manual inspection.
What is a function selector?
The first 4 bytes of call data, derived from the keccak256 hash of the function signature (e.g., "transfer(address,uint256)").
Is it free?
Yes, completely free.
Is my data safe with this tool?
Absolutely. The Ethereum ABI Decoder processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the Ethereum ABI Decoder work on mobile devices?
Yes, the Ethereum ABI Decoder is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Ethereum ABI Decoder in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the Ethereum ABI Decoder?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Ethereum ABI Decoder works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Free Ethereum ABI Decoder
Free Ethereum ABI Decoder is a free, browser-based tool in our Utility Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.