---
title: poweredByHeader
description: "Next.js will add the `x-powered-by` header by default. Learn to opt-out of it here."
url: "https://nextjs.org/docs/15/app/api-reference/config/next-config-js/poweredByHeader"
docs_index: /docs/15/llms.txt
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 documentation, see [/docs/15/llms.txt](/docs/15/llms.txt).

By default Next.js will add the `x-powered-by` header. To opt-out of it, open `next.config.js` and disable the `poweredByHeader` config:

```js title="next.config.js"
module.exports = {
  poweredByHeader: false,
}
```

---

For a semantic overview of all documentation, see [/sitemap.md](/sitemap.md)

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