Technical requirements

From Joomla! Documentation

Joomla! 
3.x
Joomla! 
4.x

Requirements for Supported Software

Requirements for Joomla! 4.x Joomla 4.x and Joomla! 3.10 Joomla 3.10

Details can be found on the Joomla! Downloads Portal.

Optional Requirements for Joomla!

Some optional technical requirements aren't required to install and run Joomla! but are required for some dependencies running different internal APIs.