System requirements
To install JEM4 you minimally need:
- A working Joomla!4 / Joomla!5 installation
- PHP 8.0 or higher
- MySQL database
The JEM installer will check for minimal version requirements and will abort the install if they are not met.
The following PHP settings are recommendend:
- max_execution_time >= 30
- memory_limit >= 32M (>= 64M recommended) - depends on other Joomla extensions used
- safe_mode >= off
- allow_url_fopen >= on
- upload_max_filesize >= 4M
For local development you can use a local webserver of your choice e.g. Apache or IS.