---
title: pageExtensions
description: Extend the default page extensions used by Next.js when resolving pages in the Pages Router.
url: "https://nextjs.org/docs/15/app/api-reference/config/next-config-js/pageExtensions"
version: 15.5.15
lastUpdated: 2025-06-16
prerequisites:
  - "Configuration: /docs/15/app/api-reference/config"
  - "next.config.js: /docs/15/app/api-reference/config/next-config-js"
---


---

For an index of all available documentation, see [/docs/15/llms.txt](/docs/15/llms.txt)