Next.js Middleware

Running code before a request is completed to modify the response or redirect the user.

Edit Concept ✏️

Next.js Middleware

Middleware allows you to run code before a request is completed. Based on the incoming request, you can modify the response by rewriting, redirecting, modifying the request or response headers, or responding directly.

Key Characteristics

  • Edge Runtime: Middleware runs on the Edge, making it extremely fast and low-latency.
  • Filtering: You can use a matcher to limit Middleware to specific paths.
  • Use Cases: Authentication, Bot protection, A/B testing, Redirects, and Localization.