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Next.js is a React framework built by Vercel that transforms React from a client-side rendering library into a full-stack application platform. Where React answers only the question 'how do I render UI components efficiently?', Next.js answers every question a production web application needs answered: How do pages get served? How does the server communicate with the database? How do search engines index the content? How do images load fast? How does authentication work? How is the application deployed? Next.js ships with file-based routing, multiple rendering strategies (SSR, SSG, ISR, Server Components), API routes, middleware, image optimization, font optimization, metadata API for SEO, and a deployment platform (Vercel) that turns a git push into a live URL in 30 seconds.

The distinction between React and Next.js is not just about features — it is about where code runs. React is purely client-side: JavaScript runs in the browser after HTML is delivered. Next.js blurs the client-server boundary by introducing React Server Components (RSC) — components that run on the server, have direct database access, never ship their JavaScript to the browser, and stream their HTML output to the client. This architecture, stabilized in Next.js 13 App Router and refined through Next.js 14 and 15, represents the biggest shift in React development since hooks. Developers who understand Server Components and the App Router are writing the React of the next decade — not just a version bump.

Next.js has become the default framework for product-first companies building on React in India. Razorpay, Zepto, CRED, Groww, Meesho, and hundreds of high-growth startups use Next.js for their customer-facing interfaces. Global companies like Notion, Linear, Vercel, GitHub (in parts), TikTok's web presence, and Netflix's marketing sites run on Next.js. For Indian developers, Next.js is the primary skill that separates developers who work on internal dashboards at IT services companies from developers who build the consumer products that millions of Indians use daily. In 2026, Next.js is the single most valuable React skill for developers targeting product companies, remote roles, and the global freelance market.