--- title: "Backend modules API" manual: "TYPO3 Explained" version: "13.4" permalink: "https://docs.typo3.org/permalink/t3coreapi:backend-modules@13.4" source: "ApiOverview/Backend/BackendModules/Index.rst" rendered: "2026-09-28T12:45:33+00:00" --- # Backend modules API {#backend-modules} Registration of backend modules was changed with version 12. Read more: Backend module configuration. This chapter describes the API that can be used to create custom backend modules in extensions. See the following chapter for a tutorial on [how to create custom backend modules](https://docs.typo3.org/permalink/t3coreapi:backend-modules-how-to@13.4). **[Backend GUI](https://docs.typo3.org/permalink/t3coreapi:backend-gui@13.4)** Describes the graphical user interface structure of a backend module and defines how the different parts are called. **[Backend module configuration](https://docs.typo3.org/permalink/t3coreapi:backend-modules-configuration@13.4)** Howto register custom modules provided by extensions. **[Toplevel modules](https://docs.typo3.org/permalink/t3coreapi:backend-modules-toplevel-module@13.4)** Lists all toplevel modules available by default and explains how to register custom toplevel modules. **[ModuleProviderAPI](https://docs.typo3.org/permalink/t3coreapi:backend-module-interface@13.4)** The `ModuleProvider` API, allows extension authors to work with the registered modules. **[BeforeModuleCreationEvent](https://docs.typo3.org/permalink/t3coreapi:beforemodulecreationevent@13.4)** The PSR-14 [BeforeModuleCreationEvent](https://docs.typo3.org/permalink/t3coreapi:beforemodulecreationevent@13.4) allows extension authors to manipulate the module configuration before it is used to create and register the module. **[Button components](https://docs.typo3.org/permalink/t3coreapi:button-components@13.4)** The menu button bar of a backend module can hold various components. **[Override backend templates](https://docs.typo3.org/m/typo3/reference-typoscript/13.4/en-us/PageTsconfig/Templates.html#pagetemplates)** Backend templates can be overridden via page TSconfig. But you should be careful: backend templates are mostly not API and can break on updates. **[Tutorial and how to](https://docs.typo3.org/permalink/t3coreapi:backend-modules-how-to@13.4)** Learn how to create a backend module step-by-step. - [Modules.php](https://docs.typo3.org/permalink/t3coreapi:modules-php-backend-module-configuration@13.4) - [3rd level](https://docs.typo3.org/permalink/t3coreapi:third-level-modules-module-functions@13.4) - [Toplevel](https://docs.typo3.org/permalink/t3coreapi:toplevel-modules@13.4) - [Backend GUI](https://docs.typo3.org/permalink/t3coreapi:backend-gui-1@13.4) - [DocHeaderComponent](https://docs.typo3.org/permalink/t3coreapi:docheadercomponent@13.4) - [ModuleData](https://docs.typo3.org/permalink/t3coreapi:module-data-object@13.4) - [ModuleInterface](https://docs.typo3.org/permalink/t3coreapi:moduleinterface@13.4) - [ModuleProvider](https://docs.typo3.org/permalink/t3coreapi:moduleprovider@13.4) - [ModuleTemplate](https://docs.typo3.org/permalink/t3coreapi:moduletemplate@13.4) - [ModuleTemplateFactory](https://docs.typo3.org/permalink/t3coreapi:moduletemplatefactory@13.4) - [TypoScript](https://docs.typo3.org/permalink/t3coreapi:typoscript-configuration-of-modules@13.4) - [Sudo mode](https://docs.typo3.org/permalink/t3coreapi:sudo-mode-in-typo3-backend-modules@13.4)