---
title: "Flatten ViewHelper <f:flatten>"
manual: "Fluid ViewHelper Reference"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3viewhelper:typo3fluid-fluid-flatten@main"
source: "Global/Flatten.rst"
modified: "2026-09-17T05:12:06+00:00"
---

# Flatten ViewHelper `<f:flatten>`

The FlattenViewHelper flattens a multi-dimensional array into a
single-dimensional array.

Go to the source code of this ViewHelper: [FlattenViewHelper.php (GitHub)](https://github.com/TYPO3/Fluid/blob/main/src/ViewHelpers/FlattenViewHelper.php).

## Arguments of the `<f:flatten>` ViewHelper

-   **value**

    -   *Type:* array

    An array