What is Next.js?
A React framework that adds routing, server rendering, and deployment tooling on top of React's component model.
Next.js is a full-stack web framework built on React. It provides file-based routing, server-side rendering (SSR), static site generation (SSG), API routes, image optimization, and deployment to Vercel or any Node.js host. In 2026, Next.js is the default framework for AI app builders because it provides the infrastructure patterns (routing, metadata, deploy) that raw React doesn't.