Overview
A block explorer is a web application that provides a graphical interface for browsing the Bitcoin blockchain. It acts as a search engine for on-chain data, allowing anyone to look up transaction details, inspect block contents, check address histories, and monitor network statistics without running their own full node.
Common Features
- Transaction lookup: View inputs, outputs, fees, and confirmation status by entering a transaction ID
- Address history: See all transactions associated with a given address, along with current balance
- Block inspection: Browse individual blocks, their transactions, the miner who produced them, and the block reward
- Mempool visualization: Monitor unconfirmed transactions and fee rate distribution
- Network statistics: Track hash rate, difficulty, transaction volume, and other metrics
Popular Block Explorers
Explorer URL Notable Feature
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mempool.space mempool.space Mempool visualization
Blockstream blockstream.info Tor support, API
OXT oxt.me Transaction graph analysis
Privacy Considerations
Using a third-party block explorer can leak privacy information. When you look up your own addresses or transactions, the explorer operator can link your IP address to your Bitcoin activity. For maximum privacy, run your own block explorer connected to your own full node, or access public explorers through Tor.
Self-Hosted Options
Privacy-conscious users can run self-hosted block explorers such as mempool (the open-source software behind mempool.space) or Electrs paired with a frontend. These connect to your own node, ensuring that your queries never leave your network.