Below you will find the necessary steps to achieve that:

Important: When you reset the database, you will lose all the customization and options you have set.

  • Install WordPress database reset plugin.

Go to WordPress admin menu-Plugins-Add new, and in the right section of the screen look for the WordPress database reset plugin. Click on the Install now button to download and install that plugin.

  • Activate the Plugin

Click on the Activate plugin link after the download and installation process has finished.

  • Reset the Database

Go to Wordpress admin menu - tools - database reset and reset the database.