---
title: "Extensions (System)"
manual: "Getting Started"
version: "main"
permalink: "https://docs.typo3.org/permalink/t3start:system-extensions@main"
source: "Concepts/Backend/SystemMaintainerArea/Extensions.rst"
modified: "2026-09-15T08:44:38+00:00"
---

# Extensions (System)

> [!NOTE]
> **Changed in version 14.0**
>
> This module has been moved from **Admin tools** to **System**
> see [Feature: #107628 - Improved backend module naming and structure](https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/14.0/Feature-107628-ImprovedBackendModuleNamingAndStructure.html#feature-107628-1729026000).

Only available if [`typo3/cms-extensionmanager`](https://packagist.org/packages/typo3/cms-extensionmanager) is installed.

The backend module **System > Extensions**, also called
"Extension Manager", can be used in Composer-based extensions to view which
TYPO3 extensions are installed. In Classic mode installation (not in the scope
of this guide) they can also be used to install and activate extensions:
[Installing an Extension using the Extension Manager](https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/Administration/ExtensionManagement/ClassicMode/Index.html#extension-install).