# Page Not Found

`/docs/app/building-your-application/routing/middleware` does not exist. Similar pages:

- [Routing Middleware](/docs/routing-middleware.md): Routing Middleware is available on all plans Routing Middleware executes code _before_ a request is processed on a site, and are built on top of
- [Getting Started with Routing Middleware](/docs/routing-middleware/getting-started.md): Routing Middleware lets you to run code before your pages load, giving you control over incoming requests. It runs close to your users for fast
- [Features](/docs/build-output-api/features.md): This section describes how to implement common Vercel platform features through the Build Output API through a combination of platform primitives,

All pages: [/llms.txt](/llms.txt)