Block Explorer
An online tool letting users search blockchain data-transactions, addresses, blocks, and more.
A block explorer is a web interface for browsing the Bitcoin chain. Type in an address, transaction ID, or block height; get back the on-chain data associated with it: balances, transaction history, confirmations, fees, mempool status.
Block explorers are universally useful and universally a privacy compromise. Every search you make tells the operator which addresses or transactions you care about. For casual lookups this is fine; for queries related to your own wallet it's a privacy leak that gets correlated with your IP, your browser fingerprint, and any cookies in play.
Popular explorers in 2026:
- mempool.space - open-source, Tor mirror available, runs against your own node if you self-host (the canonical reference for fee market visualization).
- ChainQuery.com - the Bitcoin explorer this site is paired with. Honest UI, no tracking, fed by an independent node.
- blockchain.com, blockchair, blockstream.info - older or commercial alternatives with varying privacy practices.
For privacy-sensitive use cases, run your own node and use a local explorer (mempool.space self-hosted, BTC RPC Explorer, btc-rpc-explorer). A full node plus a local explorer means you see the chain data and only you - no third party logs your queries.
For everyday "did my transaction confirm" or "what's the current fee market" type questions, public explorers are fine. Just don't paste your savings address into a search box on every site you visit.
Key takeaways
- Publicly displays transaction histories and block info
- A common way to verify confirmations or address balances
- Potential privacy trade-offs if relying on third-party services