Block Explorer

A block explorer is best understood as a search engine sitting on top of a blockchain. The ledger itself is just an ordered stream of raw, encoded data, so an explorer connects to a full node, indexes every block as it arrives, and translates that data into a searchable, human-readable website: addresses, balances, confirmations, and smart contract calls all become legible without anyone running their own node.

Under the hood, the explorer never verifies or changes anything; it simply reports what the chain already contains. A user can paste a transaction ID into the search bar to see whether it succeeded, failed, or is still waiting in the mempool, check how many confirmations have stacked on top of it, or look up a wallet address to see its balance and full history. On Ethereum, explorers like Etherscan go further, decoding verified smart contract source code and splitting gas costs into the burned base fee and the tip paid to validators.

• Block height, timestamps, and miner or validator details
• Wallet balances and transaction history
• Transaction fees and mempool congestion
• Smart contract source code and token transfers

Each major network has its own dominant explorer, since data formats differ chain to chain: Blockchain.com and mempool.space for Bitcoin, Etherscan for Ethereum, with sister sites covering other chains. Because explorers only display public information, they are safe to use for research, but no legitimate explorer will ever ask for a seed phrase or private key.