There are many reasons why you may want to export existing users to a fresh Joomla installation, whatever that reason may be here’s a step by step guide on how you can export your Joomla users and their password directly from phpMyAdmin panel.
1. Log into you MysqlAdmin panel.
2. Select the joomla database from the left panel.
3. Click on the check boxes to select the following tables:
Quick – display only the minimal options.
Once the download has completed you can then import these tables to your new Joomla installation using the same methord as above but selecting to import instead of export!