> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/nuxt/nuxt/llms.txt
> Use this file to discover all available pages before exploring further.

# nuxt preview

> The preview command starts a server to preview your application after the build command.

```bash theme={null}
npx nuxt preview [ROOTDIR] [--cwd=<directory>] [--logLevel=<silent|info|verbose>] [--envName] [-e, --extends=<layer-name>] [-p, --port] [--dotenv]
```

The `preview` command starts a server to preview your Nuxt application after running the `build` command. The `start` command is an alias for `preview`. When running your application in production refer to the [Deployment section](/deployment/deployment).

## Arguments

| Argument      | Description                                    |
| ------------- | ---------------------------------------------- |
| `ROOTDIR="."` | Specifies the working directory (default: `.`) |

## Options

| Option                               | Default | Description                                                                                                                                          |
| ------------------------------------ | ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| `--cwd=<directory>`                  |         | Specify the working directory, this takes precedence over ROOTDIR (default: `.`)                                                                     |
| `--logLevel=<silent\|info\|verbose>` |         | Specify build-time log level                                                                                                                         |
| `--envName`                          |         | The environment to use when resolving configuration overrides (default is `production` when building, and `development` when running the dev server) |
| `-e, --extends=<layer-name>`         |         | Extend from a Nuxt layer                                                                                                                             |
| `-p, --port`                         |         | Port to listen on (use `PORT` environment variable to override)                                                                                      |
| `--dotenv`                           |         | Path to `.env` file to load, relative to the root directory                                                                                          |

This command sets `process.env.NODE_ENV` to `production`. To override, define `NODE_ENV` in a `.env` file or as command-line argument.

<Note>
  For convenience, in preview mode, your [`.env`](#) file will be loaded into `process.env`. (However, in production you will need to ensure your environment variables are set yourself. For example, with Node.js 20+ you could do this by running `node --env-file .env .output/server/index.mjs` to start your server.)
</Note>