> ## Documentation Index > Fetch the complete documentation index at: https://docs.blockscout.com/llms.txt > Use this file to discover all available pages before exploring further. # Blockscout Docs > Blockscout is a universal, open-source blockchain explorer for inspecting, analyzing, and interacting with EVM-based chains. Blockscout supports over 1000 L1, L2 and L3 EVM-based chains, optimistic rollups, and ZK rollups. Learn about key features and supported chains Quickstart for blockchain explorer users Get started with APIs, SDK and more Get your self hosted instance up-and-running Switch to Blockscout from another explorer like Etherscan ## Explorer Hosting Options * [Explorer as a Service](https://eaas.blockscout.com/#explorer-as-a-service) for enterprise and production grade hosting * [Autoscout](https://deploy.blockscout.com/) self-service launchpad for instant explorer deployment