You are on eitherscan.com — an independent, client-side toolbox. Not affiliated with Etherscan. Looking for the block explorer? Go to etherscan.io. Why this banner?

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You've landed in the 'Either' zone.

Chances are you were looking for the Ethereum block explorer. That site is etherscan.io — and this one is not it, nor affiliated with it.

SEC_LESSON_01

You just visited a domain that is one letter away from a site people paste private data into. It happened to be harmless this time. In the wild west of Web3, never blindly click links. Type the address yourself. Bookmark the real one. Check the padlock and the spelling. Do Your Own Research (DYOR).

sys.ver: honeypot_v2 → utility_v1

So what is this site?

A free box of developer utilities for Ethereum, Optimism and Arbitrum. Unit conversion, keccak hashing, wallet generation, message signing, ABI encoding, calldata decoding, gas tracking, ENS resolution — the small things you reach for daily.

  • No backend. The site is static files. Chain data is fetched by your browser directly from public JSON-RPC endpoints — or from an RPC URL you set in Settings.
  • Keys never leave the tab. Wallet generation, key inspection and local signing use audited libraries (viem / noble / scure) running in your browser. Nothing is transmitted or stored. You can load a key tool, go offline, and it keeps working.
  • No analytics, no cookies, no accounts. The only thing persisted is your chain / RPC preference in localStorage.
  • Open standards. EIP-55, EIP-191, EIP-712, EIP-1559, EIP-681, EIP-1193, BIP-32/39/44.

Working offline

On your first visit a service worker downloads every page and script of this site (about 1.5 MB). From then on you can turn off Wi-Fi / unplug the network and open any tool — the wallet generator, key inspector, signers, converters and decoders all run locally. Only the tools marked browser → public RPC need a connection. We recommend going offline before generating or pasting any private key; the footer shows when the cache is complete.

Block explorers

When you need transaction history, verified source code or token pages, use the real explorers:

Contact

Bugs, ideas, tool requests: support@eitherscan.com. Everything else: contact@eitherscan.com.

Web3 security team or brand-protection wizard? This domain is available for the right home — contact@eitherscan.com.