System Extensions

Documentation of extensions managed within the core repository directly and maintained by the core team and core contributors are called system extensions. If working with the full core package, these extensions can be found in typo3/sysext directory.

Some of these extensions provide documentation, too. These are listed here.

EXT:core, EXT:backend and other system extensions do not have their own documentation; the functionality is documented in TYPO3 Explained. For Extbase and Fluid, please see Developing TYPO3 Extensions with Extbase and Fluid.

Documentation of system extensions in current core version

The list of extensions developed directly in the core repository changes from time to time: Some extensions are merged into others, some are integrated, others abandoned from core and maintained at a different place.

The list below is kept in sync with the current development version of the core, the table further below lists extensions that were part of the core and extracted at some point in time.

Admin Panel

The TYPO3 admin panel provides a panel with additional functionality in the frontend (Debugging, Caching, Preview…).



A Dashboard for the TYPO3 backend.


Frontend Login

Frontend login based on frontend users and user groups


Form framework

Form Library, Plugin and Editor.


Indexed Search

Indexed Search Engine for TYPO3 pages, PDF-files, Word-files, HTML and text files. Provides a backend module for statistics of the indexer and a frontend plugin.


Import / Export

Import and Export of records from TYPO3 in a custom serialized format (.T3D) for data exchange with other TYPO3 systems.


Link Validator

The Link Validator checks the links in your website for validity.



Enables the ‘Config’ and ‘DB Check’ modules for technical analysis of the system. This includes raw database search, checking relations, counting pages and records etc.



The recycler offers the possibility to restore deleted records or remove them from the database permanently.



Create manual redirects, list existing redirects and automatically createnredirects on slug changes.



Integration of CKEditor as a Rich Text Editor for the TYPO3 backend.



The TYPO3 Scheduler lets you register tasks to happen at a specific time.



SEO features including specific fields for SEO purposes, rendering of HTML meta tags and sitemaps.


Workspaces and Versioning

Adds workspaces functionality with custom stages to TYPO3.


Documentation of system extensions abandoned from current core version

Manual Extension key Versions Comment
ADOdb adodb 8.4 | 7.6 Included until TYPO3 <= 7.6
CSS Styled Content css_styled_content 8.7 | 7.6 | 6.2 Included until TYPO3 <= 8.7
Database abstraction layer dbal 8.4 | 7.6 | 6.2 Included until TYPO3 <= 7.6
func func   Was removed from core in 9.0, see Changelog
Openid openid 8.1 | 8.0 | 7.6 | 6.2 Included until TYPO3 <= 6.2
RSA authentication rsaauth 9.5 | 8.7 | 7.6 | 6.2 Included until TYPO3 <= 9.5
htmlarea RTE rtehtmlarea 8.7 | 7.6 | 6.2 Included until TYPO3 <= 7.6
Salted user password hashes saltedpasswords 8.7 | 7.6 | 6.2 Merged into main core extension since TYPO3 >=7.4. See Core API
System Actions sys_action 9.5 | 8.7 | 7.6 | 6.2 Included until TYPO3 <= 9.5
Taskcenter taskcenter 9.5 | 8.7 | 7.6 | 6.2 Included until TYPO3 <= 9.5