Which Bitcoin Explorer Should I Use?

Choosing a Bitcoin Block Explorer

A blockchain explorer is the primary interface for inspecting Bitcoin's public ledger: looking up transactions, checking confirmations, monitoring mempool congestion, and debugging payment flows. The explorer you choose affects what data you can access, how much privacy you retain, and whether you can integrate it into your own infrastructure.

Five explorers dominate the Bitcoin ecosystem: Mempool.space, Blockstream.info (Esplora), Blockchain.com, OXT (now defunct), and Bitaps. Each serves a different audience. The table below provides a quick comparison across the dimensions that matter most.

For a broader feature-by-feature breakdown, see our Bitcoin block explorer comparison tool.

Mempool.space

Mempool.space is the most feature-rich open-source Bitcoin explorer available. Founded in 2018, it has become the default explorer for developers, miners, and power users. Its signature feature is the real-time mempool depth chart, which visualizes pending transactions color-coded by fee rate in sat/vB.

Version 3.0.0 (released August 2024) added Mempool Goggles with 25 transaction type filters (Ordinals, Runes, consolidations, and more), Full-RBF timelines, CPFP effective fee calculations, and a Liquid Network audit tool. The Mempool Accelerator lets users pay out-of-band fees to mining pools covering roughly 40% of global hashrate, with payment via Lightning, Cash App, Apple Pay, or Google Pay.

Mempool.space supports seven networks: Bitcoin mainnet, testnet, signet, Liquid mainnet and testnet, Lightning Network, and Bisq. Its built-in Lightning explorer tracks channel capacity, node distribution by ISP, and network-level statistics.

The project is licensed under AGPL-3.0 and available on GitHub. Self-hosting is supported through one-click installs on Umbrel, RaspiBlitz, MyNode, RoninDojo, and StartOS, or via Docker for custom deployments. A Tor .onion address is available for privacy-conscious users.

Blockstream.info (Esplora)

Blockstream's explorer is built on the open-source Esplora project (MIT license). The UI was fully rebuilt in August 2026, adding a dashboard with four core metrics: time since last block, recommended fee, mempool congestion level, and a Bitcoin price chart. Fee rates are displayed in both sat/vB and dollar equivalents across low, average, and high tiers.

The standout technical features include privacy analysis (flagging address reuse and likely self-transfers), SegWit fee savings calculations on individual transactions, and confirmation ETAs for unconfirmed transactions. For Liquid Network users, the explorer provides proof-of-reserves verification, Confidential Transaction unblinding, and Simplicity contract decoding.

Blockstream launched Electrum JSON-RPC support in February 2026 and introduced QuickSync (based on the Waterfalls protocol) for faster wallet syncing: benchmarks show a 62% reduction in sync time and 65% fewer API requests compared to standard address-by-address queries. The explorer API offers a free tier of 500,000 requests per month, with paid tiers from $40/month (500K calls) to $3,000/month for unlimited enterprise access with a 99.9% SLA.

Self-hosting uses pre-built Docker images from GitHub, with support for Bitcoin mainnet, testnet3, testnet4, signet, regtest, and Liquid variants. A Tor .onion address is available, and the Docker setup includes a dedicated Tor image.

Blockchain.com Explorer

Blockchain.com is one of the oldest Bitcoin explorers, offering a clean, accessible interface for transaction and block lookups. It supports Bitcoin, Ethereum, Bitcoin Cash, and Solana. The UI is polished and designed for users who need quick transaction lookups without technical complexity.

The API provides three access methods: a Blockchain Data API (JSON for blocks, transactions, and addresses), a Simple Query API (plain text for hashrate and difficulty), and WebSockets for real-time streaming of new blocks and transactions. Rate limits are restrictive: the Simple Query API allows only one request every 10 seconds, while authenticated API keys support up to 100 requests per second across all keys per organization.

Blockchain.com Explorer is closed-source and cannot be self-hosted. There is no Tor .onion address. For users who prioritize open-source tooling, verifiable infrastructure, or Tor-based privacy, Mempool.space or Blockstream.info are stronger alternatives.

OXT.me (Defunct)

OXT was the leading Bitcoin privacy analysis tool, offering transaction graph visualization, address clustering via common-input-ownership heuristics, Boltzmann entropy analysis for CoinJoin transactions, and wallet activity pattern detection. It was acquired by Samourai Wallet in December 2017.

On April 24, 2024, U.S. federal law enforcement seized OXT's servers following the indictment of Samourai Wallet's co-founders on money laundering charges. OXT has been offline since and shows no indication of returning. The privacy analysis gap left by OXT has been partially filled by am-i.exposed, an open-source client-side tool offering 31 privacy heuristics, Boltzmann entropy via WebAssembly, and entity matching against 30 million known addresses.

For current privacy-focused exploration, see our guide to the Bitcoin privacy landscape in 2026.

Bitaps

Bitaps is a lightweight Bitcoin explorer that also provides payment processing and transaction creation tools. It supports Bitcoin mainnet only, with no testnet, signet, Lightning, or Liquid coverage. The explorer offers basic block, transaction, and address lookups alongside fee analytics and market price monitoring.

The API is RESTful and covers blockchain data, payment processing, redeem codes, and market price monitoring. Rate limits are not publicly documented. While the explorer frontend is not open source, Bitaps maintains several open-source libraries on GitHub, including btcapiserver (a Python-based API server requiring Bitcoin Core 0.16.3+), pybtc, and jsbtc, all under GPL-3.0.

Bitaps lacks Tor support and cannot be self-hosted as a complete explorer. It fills a niche for users who want a simple lookup interface with integrated payment tools, but it falls short of Mempool.space and Blockstream.info in depth, network coverage, and infrastructure flexibility.

API Rate Limits and Pricing

For developers building applications on top of a block explorer API, rate limits and pricing are decisive factors. The table below compares the commercial API tiers.

Mempool.space's enterprise tier supports up to 150 million API calls daily across six data centers, with co-branded subdomains and a 99.99% SLA. Blockstream offers a 99.9% SLA with dedicated infrastructure at the enterprise level and recently added QuickSync credits for faster wallet synchronization. Blockchain.com's API is free but heavily rate-limited and does not offer paid scaling options.

Self-Hosted Explorers and Privacy

Running your own Bitcoin node with a self-hosted explorer is the only way to look up transactions without revealing your addresses to a third-party server. Every query to a public explorer leaks information: your IP address, the addresses you care about, and the timing of your lookups. Over time, this metadata can be correlated to deanonymize your UTXO set.

Both Mempool.space and Blockstream Esplora support self-hosting. Mempool.space offers one-click installs on popular full node platforms (Umbrel, RaspiBlitz, MyNode, RoninDojo, StartOS) and Docker-based deployment for custom setups. Esplora provides pre-built Docker images that support all Bitcoin network variants plus Liquid. Both require an Electrum server backend: Mempool.space recommends its own electrs fork for maximum performance, while Esplora uses the original electrs implementation by Roman Zeyde.

A third option worth noting is BTC RPC Explorer, a lightweight open-source explorer that connects directly to your node's RPC interface without requiring an Electrum backend. It is less feature-rich but simpler to deploy and ideal for personal use. For more on node setup options, see our Bitcoin node software comparison.

Which Explorer Should You Use

The right explorer depends on what you need. Here are recommendations by use case:

Casual users looking up transactions or checking confirmations:

• Mempool.space offers the best combination of clarity and depth for everyday lookups
• Blockchain.com is a simpler alternative if you also need Ethereum or Solana lookups

Developers building applications that need reliable blockchain data:

• Blockstream.info offers the most transparent API pricing with a generous free tier of 500K requests per month and Electrum RPC access
• Mempool.space's enterprise API scales higher (100M requests per month) and includes WebSocket support for real-time data

Privacy-focused users who want to avoid leaking address queries:

• Self-host Mempool.space or Esplora behind your own node
• Use the Tor .onion addresses if self-hosting is not an option
• Use am-i.exposed for client-side privacy analysis (the successor to OXT)

Enterprises and mining operations:

• Mempool.space's enterprise tier provides block audit mode, mining statistics, hashrate graphs, and the Mempool Accelerator for transaction prioritization
• Blockstream's enterprise API offers unlimited requests, no rate limits, and dedicated infrastructure with custom SLAs

For users in the Bitcoin payments ecosystem, explorers are essential for monitoring fee rates, RBF status, and confirmation progress. Protocols like Spark handle settlement off-chain, but understanding on-chain state remains critical for channel management, UTXO consolidation, and fee estimation.

Frequently Asked Questions

What is the best free Bitcoin block explorer?

Mempool.space is the most capable free Bitcoin explorer. It provides real-time mempool visualization, fee estimation, Lightning Network data, Liquid Network support, and advanced transaction decoding with no account required. The public instance is rate-limited for API use, but the web interface is fully accessible. For API-heavy workloads, Blockstream.info offers 500,000 free API requests per month with clear documentation.

Can a Bitcoin block explorer see my wallet balance or identity?

A block explorer shows all data that is publicly recorded on the blockchain: transaction amounts, addresses, and confirmation status. It cannot directly identify who owns an address. However, the operator of a public explorer can log your IP address alongside the addresses and transactions you query, which creates a metadata trail. Self-hosting an explorer or using a Tor .onion address mitigates this risk. For a deeper analysis, see our research on the Bitcoin privacy landscape.

How do I run my own Bitcoin block explorer?

The easiest path is to install Mempool.space through a node management platform like Umbrel, RaspiBlitz, or StartOS: these offer one-click installs that configure the explorer alongside your full node and Electrum server backend automatically. For custom deployments, both Mempool.space and Blockstream Esplora provide Docker images. You will need a fully synced Bitcoin Core node (approximately 600 GB of disk space) and an Electrum server index (an additional 50 to 100 GB depending on implementation).

Why did OXT.me shut down?

OXT's servers were seized by U.S. federal law enforcement on April 24, 2024, as part of the indictment of Samourai Wallet's co-founders on money laundering and unlicensed money transmitter charges. OXT had been owned by Samourai Wallet since December 2017. The platform remains offline with no announced plans to return. The open-source project am-i.exposed was created to partially fill the gap, offering client-side privacy analysis with no backend dependency.

What is the difference between Mempool.space and Blockstream Explorer?

Both are open-source and self-hostable, but they emphasize different strengths. Mempool.space excels at mempool visualization, fee estimation, and mining analytics: its depth chart, Goggles filters, and Accelerator are unmatched. Blockstream.info focuses on transaction-level analysis (privacy flags, SegWit savings calculations) and offers a more structured API with transparent pricing, Electrum RPC, and the QuickSync protocol for fast wallet synchronization. Mempool.space uses AGPL-3.0 licensing, while Esplora uses MIT.

Does Mempool.space support the Lightning Network?

Yes. Mempool.space includes a full Lightning Network explorer that tracks channel capacity, node count, node distribution by ISP and network, and historical capacity trends. You can search for specific Lightning nodes by public key or alias. This makes it one of the few explorers that covers both on-chain and off-chain Bitcoin activity in a single interface.

Which Bitcoin explorer has the best API for developers?

For most developer use cases, Blockstream.info and Mempool.space are the top choices. Blockstream offers the most predictable pricing (free tier of 500K requests per month, paid tiers up to unlimited enterprise access), Electrum RPC for programmatic wallet operations, and the QuickSync protocol for efficient address scanning. Mempool.space offers WebSocket support for real-time mempool and block data, higher throughput at the enterprise level (up to 150M daily calls), and a broader feature set including Lightning and Liquid data. Both provide well-documented REST APIs.

This tool is for informational purposes only and does not constitute financial advice. Explorer features, API pricing, and availability change frequently. OXT status reflects the April 2024 seizure. Always verify current capabilities on the explorer's official site before making infrastructure decisions.