facebook/docusaurus

Docusaurus is an open-source tool created by Meta (formerly Facebook) that makes it easy to build, deploy, and maintain documentation websites for software projects. The problem it solves is that creating a professional documentation site from scratch requires significant frontend development work, setting up build pipelines, navigation, search, versioning, and internationalization. Docusaurus handles all of that so teams can focus on writing content rather than building infrastructure. Under the hood, Docusaurus takes Markdown files as input and generates a complete static website, meaning it produces plain HTML, CSS, and JavaScript files that can be hosted anywhere without a server. It uses React as its UI framework, so the site is interactive and feels modern in the browser. Key built-in features include a documentation section, a blog, automatic navigation sidebars, internationalization support for translating content through CrowdIn, and built-in theming and customization. Getting started is a single command: running the initialization CLI creates a new project in seconds, and deploying to platforms like Netlify or Vercel is a one-click operation. You would use Docusaurus when you are maintaining an open-source library, an internal API reference, a developer tool, or any project where you want structured, searchable, versioned documentation hosted as a website. The tech stack is TypeScript and React on the frontend, Node.js for the build process, and the output is a static site that requires no server runtime.