What Node.js does
Node.js is a free, open-source JavaScript runtime environment built on the V8 JavaScript engine, the same engine that powers the Chrome browser. It enables JavaScript code to run outside a web browser — on servers, build machines, and the command line — making it possible to use a single programming language across both the front end and the back end of an application. At its core, Node.js uses an event-driven, non-blocking input/output model, which means it handles many concurrent operations without waiting for each one to finish before starting the next. This design suits networked applications such as web APIs, real-time chat servers, streaming services, and microservices that need to respond to many requests simultaneously. Node.js ships with npm, the Node Package Manager, which gives developers immediate access to install, manage, and share reusable code packages from the npm registry — one of the largest collections of open-source software libraries available. The runtime supports both the CommonJS module system and the modern ES module standard, so projects can import code using either convention. Developers rely on Node.js not only for server-side application logic but also as the engine that drives build tooling for front-end projects. Bundlers, transpilers, testing frameworks, linters, and task runners commonly list Node.js as a prerequisite, making it a standard installation on developer workstations and continuous integration machines alike. Node.js is maintained by the OpenJS Foundation and is licensed under the MIT License, meaning it is free to use in personal, open-source, and commercial projects. It runs on Windows, macOS, and Linux. The installer on this page is the complete offline standalone package sourced directly from the official Node.js project at nodejs.org, and it sets up the runtime, npm, and system PATH entries in a single pass without requiring an internet connection during installation. For safety, always download Node.js exclusively from the official publisher at nodejs.org.
