---
title: "Installation of system extension lowlevel"
manual: "Low Level"
version: "13.4"
permalink: "https://docs.typo3.org/permalink/typo3/cms-lowlevel:installation@13.4"
source: "Installation/Index.rst"
rendered: "2026-10-03T08:24:29+00:00"
---

# Installation of system extension lowlevel {#installation}

The extension [`typo3/cms-lowlevel`](https://packagist.org/packages/typo3/cms-lowlevel) is part of the TYPO3 Core,
but not installed by default.

**Table of contents**

-   [Installation with Composer](https://docs.typo3.org/permalink/typo3/cms-lowlevel:installation-with-composer@13.4)
-   [Installation in classic mode](https://docs.typo3.org/permalink/typo3/cms-lowlevel:installation-in-classic-mode@13.4)

## Installation with Composer {#installation-composer}

Check whether you are already using the extension with:

```bash
composer show | grep lowlevel
```

This should either give you no result or something similar to:

```none
typo3/cms-lowlevel       v12.4.11
```

If it is not installed yet, use the `composer require` command to install
the extension:

```bash
composer require typo3/cms-lowlevel
```

The given version depends on the version of the TYPO3 Core you are using.

## Installation in classic mode {#installation-classic}

In a classic-mode installation (without Composer), the extension is already
shipped but might not be activated yet. Activate it as follows:

1.  In the backend, navigate to the **Admin Tools > Extensions**
    module.
1.  Click the **Activate** icon for the Lowlevel extension.

![Extension manager showing Lowlevel extension](../Images/InstallActivate.png)