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Tools/Address checker
EVERYDAY ESSENTIAL · RUNS IN YOUR BROWSER

Address checksum checker

Check the format. Get the EIP-55 checksum.

A valid format does not prove ownership, available funds or recipient safety. ENS resolution is not performed.

HOW THE CONCEPT WORKS · SEPARATE TEACHING EXAMPLE
From a public address to a verified signatureStep 1 / 4
From a public address to a verified signaturePublic address0x0000…0001Share to receiveAnother personCan read the addressCannot sign for youPublic identifier ≠ secret authorizationLocal signerPrivate key stays hereSign the chosen requestSigned requestMessage + signatureSecret key not includedThe moving packet represents a signature, not a keySignatureCheck the exact messageCheck the signing contextVerificationAuthorization checkedIntent still mattersValidity and safety are different questionsWallet interfaceReads public dataRequests authorizationNetwork stateBalances and recordsIndependent verificationNo wallet is connected in this local illustration

An address is public receiving information. It is not the private key that authorizes actions.

Animated local teaching model. No wallet, RPC or live blockchain data. Some labels and hashes are abbreviated for readability.

How to use this address checker

Validate a 20-byte Ethereum address and calculate its EIP-55 checksum. This checks formatting only, not ownership, balances, network or recipient safety. Start with the prefilled example, change an input, and run the calculation. Invalid values produce an explanation rather than a misleading result.

What the result means

These results describe your supplied inputs. They do not query a blockchain, check balances, estimate current network conditions, or submit transactions. Read wallets, keys and addresses for the meaning and limits of the calculation.