TYPO3 v9 has reached its end-of-life September 30th, 2021 and is not maintained by the community anymore. Looking for a stable version? Use the version switch on the top left.

You can order Extended Long Term Support (ELTS) here: TYPO3 ELTS.

For Developers

Fluid / Extbase

To find out more about Templating using Fluid and building your own extensions in Extbase, the following resources are recommended:


Note that currently, the online resource Developing TYPO3 Extensions with Extbase and Fluid may be partly outdated. The TYPO3 Extbase and Fluid book, 3rd edition by Michael Schams was just released, so it should be up to date.

You may also want to refer to the Fluid ViewHelper reference once you work with Fluid.

TYPO3 Explained

"TYPO3 Explained" is part of the official documentation on

It is an extensive resource that aims to gives you an introduction to TYPO3, its extension architecture and a detailed outline of its API. The API Overview covers more than just the public functions of TYPO3, it also explains the concepts and how to use core functionality.

It is (in most parts) well maintained.

Extension Builder

See Creating a new Extension. It contains a description of how to create a new extension with the Extension Builder.


There are a number of dedicated references for TCA, TSconfig, TypoScript and Fluid. Have a look in this list:

You will definitely need these, if you want to get serious about developing for TYPO3.


You can also look at existing extensions to see how other developers have built their extensions.

All (publicly available) third party extensions are listed in the TYPO3 Extension Repository.

You can do a search, and then click on "Code Insights" to go to the code repository.


Make sure to always choose an extension that supports the TYPO3 version you are using. So, if you are using TYPO3 9, restrict your search to extensions, that already support TYPO3 9.

TYPO3 has gone through several large changes between each major version, so be sure to look at code and documentation for your current version.

search in TER

Search in TYPO3 Extension Repository for extensions that support version 9.

Some extensions that are already used as examples in the documentation are:

For Developing Backend Modules:


Look at the Core Source-Code

Of course, you can also look at the TYPO3 source code.

For online browsing, you can use GitHub.

Again, make sure to look in the correct branch for your version.

Not Found What You Were Looking For?


You can also go to the Slack channel #typo3-cms and ask for recommendations about what to read for your particular task.