Developer utilities

Web3 Dev Tools

Everyday utilities for builders and traders. Fast, private, and they all run right in your browser.

100% client-side Nothing leaves your device

Convert between Wei, Gwei and Ether instantly. Type in any field and the others update automatically.

1 ETH = 1,000,000,000 Gwei = 10¹⁸ Wei

Sign a message with your wallet to prove ownership, or verify that a signature matches an address.

Signature

Verify a Signature

Paste a message, signature and address to check if they match.

Result

Paste raw transaction input data (hex) to see the function and parameters. Understand what a transaction does before you sign it.

Decoded
This decodes common functions (transfer, approve, etc.) by their selector. For full ABI decoding, use a dedicated tool.

Generate a wallet address that starts with letters you choose. Runs entirely in your browser — the private key never leaves your device.

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Address
Private Key — keep this secret!
⚠ Never share your private key. For real funds, generate keys in a trusted offline environment.