# Flatten list transform action

## Use case

You are working with a list of users, however the users are nested in a list.

You would like to flatten the list of lists so it ends up as a list of objects.

## Overview

<figure><img src="https://1835401289-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAQQ1EHVcEsGKBPVHmiav%2Fuploads%2FQrMPduruYybvj1x1i0aQ%2FScreenshot%202025-04-18%20at%202.40.56%E2%80%AFPM.png?alt=media&#x26;token=ab3bb3fa-3b51-43df-b0e4-5b9d6dd7c5d5" alt=""><figcaption></figcaption></figure>

Flatten a nested List.

## Parameters

<table><thead><tr><th width="217">Parameter</th><th width="417.3333333333333">Description</th><th data-type="checkbox">Required</th></tr></thead><tbody><tr><td>Array variable to flatten</td><td>The array you would like to flatten</td><td>true</td></tr></tbody></table>

## Usage

<details>

<summary>Example: Flattening nested lists</summary>

Input:

**Array variable to flatten:**

```json
[
    [
        {
            "user": "Dan"
        }
    ]
],
[
    [
        {
            "user": "Bob"
        }
    ]
],
[
    [
        {
            "user": "Sheryl"
        }
    ]
],
[
    [
        {
            "user": "Sarah"
        }
    ]
],
[
    [
        {
            "user": "Sean"
        }
    ]
]
```

</details>

## Results output

Result of Example:

```json
[
  {
    "user": "Dan"
  },
  {
    "user": "Bob"
  },
  {
    "user": "Sheryl"
  },
  {
    "user": "Sarah"
  },
  {
    "user": "Sean"
  }
][
  {
    "user": "Dan"
  },
  {
    "user": "Bob"
  },
  {
    "user": "Sheryl"
  },
  {
    "user": "Sarah"
  },
  {
    "user": "Sean"
  }
]
```