OpenScan - Open-Source Blockchain Explorer

OpenScan is a trustless, open-source blockchain explorer for Bitcoin, Ethereum, and EVM-compatible networks. Connect directly to blockchain nodes with no intermediaries, no tracking, and no data harvesting.

Features

• Multi-Chain Explorer - Browse blocks, transactions, and addresses across Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, and Bitcoin.
• Smart Contract Interaction - Read from and write to verified smart contracts directly from the explorer.
• ENS Domain Lookup - Resolve Ethereum Name Service domains to addresses.
• Local Development Support - Explore Hardhat and Anvil local chains with trace capabilities.
• RPC Transparency - Compare responses across multiple RPC providers and detect inconsistencies.
• Privacy First - No ads, no trackers, no user data collection. Fully open-source.
• Decentralized Deployment - Deployable on IPFS for censorship-resistant blockchain exploration.

Supported Networks

• Ethereum (Mainnet) - Chain ID: 1
• Arbitrum One - Chain ID: 42161
• Optimism - Chain ID: 10
• Base - Chain ID: 8453
• Polygon - Chain ID: 137
• BNB Smart Chain (BSC) - Chain ID: 56
• Bitcoin
• Sepolia Testnet - Chain ID: 11155111

Frequently Asked Questions

What is OpenScan?

OpenScan is a free, open-source blockchain explorer that connects directly to blockchain nodes via RPC. Unlike centralized explorers like Etherscan, it does not rely on intermediary servers or indexed databases. It is trustless, privacy-focused, and supports multiple blockchain networks.

What blockchain networks does OpenScan support?

OpenScan supports Ethereum, Arbitrum, Optimism, Base, Polygon, BNB Smart Chain, Bitcoin, and local development chains (Hardhat, Anvil). Testnets including Sepolia are also available.

Is OpenScan free to use?

Yes. OpenScan is 100% free and open-source under the MIT license. There are no ads, no premium tiers, and no data collection.

How is OpenScan different from Etherscan?

OpenScan is trustless and decentralized. It connects directly to blockchain RPC nodes instead of relying on centralized indexing servers. It is also fully open-source, privacy-focused, supports multiple chains including Bitcoin, and can be deployed on IPFS for complete decentralization.

Can I interact with smart contracts on OpenScan?

Yes. OpenScan supports reading from and writing to verified smart contracts directly through the explorer interface. Connect your wallet and interact with any verified contract on supported EVM networks.

Can I use OpenScan for local blockchain development?

Yes. OpenScan has full support for local development chains including Hardhat and Anvil. It provides trace capabilities on localhost networks, making it useful for smart contract development and debugging.

View source on GitHub