Next.js 16 Route Handlers Explained: 3 Advanced Use Cases

Route handlers in Next.js 13.2+ offer an efficient, platform-native alternative to legacy API Routes, utilizing standard Web APIs for building server-side logic and REST endpoints with HTTP methods like GET, POST, PUT, and DELETE. These handlers are particularly useful for tasks that should not be embedded within React components, such as file generation, data transformation, and proxying, serving as a backend-for-frontend solution without necessitating a separate backend server. The article details three advanced use cases: generating downloadable CSV files of invoice data, implementing a locale-aware currency conversion endpoint with a location-based proxy, and creating a redirect management system using Vercel Edge Config. It also emphasizes the practical application of Next.js 16 route handlers for building efficient, server-side capabilities within an App Router, highlighting the importance of balancing cost and performance through best practices such as minimizing long-running operations and leveraging middleware for shared logic.