Definition
A public website or tool that allows anyone to view all transactions, blocks, wallet addresses, and activity on a blockchain in real time. The blockchain's public record made searchable.
Why It Matters
Block explorers provide full transparency. You can verify any transaction, check wallet balances, track block confirmations, and audit activity — all without trusting anyone.
Example
On Etherscan (Ethereum's block explorer), you can paste any wallet address and see its complete transaction history and current token balances.
Related Terms
Blockchain
Block
Address
Transaction