# stdout

The `filter_stdout` filter plugin prints events to the standard output \(or logs if launched as a daemon\). This filter plugin is useful for debugging purposes.

It is included in the Fluentd's core.

## Example Configurations

```text
<filter pattern>
  @type stdout
</filter>
```

A sample output is as follows:

```text
2017-11-28 11:43:13.814351757 +0900 tag: {"field1":"value1","field2":"value2"}
```

where the first part shows the output **time**, the second part shows the **tag**, and the third part shows the **record**.

## Plugin Helpers

* [`formatter`](../plugin-helper-overview/api-plugin-helper-formatter.md)
* [`compat_parameters`](../plugin-helper-overview/api-plugin-helper-compat_parameters.md)
* [`inject`](../plugin-helper-overview/api-plugin-helper-inject.md)

## Parameters

See [Common Parameters](../configuration/plugin-common-parameters.md).

### `@type` \(required\)

The value must be `stdout`.

### `<format>` Section

See [Format section configurations](../configuration/format-section.md) for more details.

#### `@type`

| type | default | version |
| :--- | :--- | :--- |
| string | stdout | 0.14.5 |

The format of the output.

#### `output_type`

| type | default | version |
| :--- | :--- | :--- |
| string | json | 0.14.5 |

This is the option of `stdout` format. Configures the format of the record \(third part\). Any formatter plugins can be specified.

### `<inject>` Section

See [Inject Section Configurations](../configuration/inject-section.md) for more details.

## Learn More

* [Filter Plugin Overview](./)