Next.js is the leading React framework for building full-stack web applications — adding file-based routing, server rendering, and a suite of built-in optimizations on top of React itself. With the App Router, Server Components, and Server Actions, it lets you write server and client code side by side in the same project while Next.js handles the hard parts: rendering strategy, caching, and performance.

This tutorial series takes you from your first page to advanced App Router patterns. You'll learn file-based routing and layouts, Server vs Client Components, every rendering strategy (SSR, SSG, ISR, streaming), data fetching and caching, Server Actions and mutations, metadata and SEO, middleware, and the built-in optimizations for images, fonts, and scripts. Whether you're coming from plain React or building your first full-stack app, these tutorials will build a deep, practical understanding of modern Next.js.