next.js/docs/01-app/03-api-reference/05-config/01-next-config-js/trailingSlash.mdx

---
title: trailingSlash
description: Configure Next.js pages to resolve with or without a trailing slash.
---

{/* The content of this doc is shared between the app and pages router. You can use the `<PagesOnly>Content</PagesOnly>` component to add content that is specific to the Pages Router. Any shared content should not be wrapped in a component. */}

By default Next.js will redirect URLs with trailing slashes to their counterpart without a trailing slash. For example `/about/` will redirect to `/about`. You can configure this behavior to act the opposite way, where URLs without trailing slashes are redirected to their counterparts with trailing slashes.

Open `next.config.js` and add the `trailingSlash` config:

```js filename="next.config.js"
module.exports = {
  trailingSlash: true,
}
```

With this option set, URLs like `/about` will redirect to `/about/`.

When using `trailingSlash: true`, certain URLs are exceptions and will not have a trailing slash appended:

- Static file URLs, such as files with extensions.
- Any paths under `.well-known/`.

For example, the following URLs will remain unchanged: `/file.txt`, `images/photos/picture.png`, and `.well-known/subfolder/config.json`.

When used with [`output: "export"`](/docs/app/guides/static-exports) configuration, the `/about` page will output `/about/index.html` (instead of the default `/about.html`).

## Version History

| Version  | Changes                |
| -------- | ---------------------- |
| `v9.5.0` | `trailingSlash` added. |