---
title: Format Command
description: Learn more about the `format` command in Melos.
---

# Format Command

<Info>Supports all [Melos filtering](/filters) flags.</Info>

The format command is used to format the code in your Melos workspace according
to Dart's formatting standards.

```bash
melos format
```

<Info>
To learn more, visit the [Dart format](https://dart.dev/tools/dart-format) 
documentation.
</Info>


## --set-exit-if-changed
Return exit code 1 if there are any formatting changes. This flag is
particularly useful in CI/CD pipelines to automatically detect and reject
commits that do not adhere to the formatting standards, ensuring code quality.

```bash
melos format --set-exit-if-changed
```

<Info>
By default, dart format overwrites the Dart files.
</Info>

## --output
This option is useful when you want to review formatting changes without
directly overwriting your files.

```bash
melos format --output
# or
melos format --o
```

Outputs the formatted code to the console.

```bash
melos format -o show
```

Outputs the formatted code as a JSON object

```bash
melos format -o json
```

Lists the files that would be formatted, without showing the formatted content
or making changes.

```bash
melos format -o none
```

## concurrency (-c)
Defines the max concurrency value of how many packages will execute the command
in at any one time. Defaults to `1`.

```bash
# Set a 5 concurrency
melos format -c 5
```