DJ-WebP - Img toWebP free Joomla plugin updatedto 0.7.Beta version.  

The new version brings PHP Library to compression images, the user can select which compression mechanism should be used by DJ-WebP. 

The issue with detecting WebP support on the server was fixed.

This plugin allows you to easily convert JPG, PNG, images in order to make your site smaller and faster for your users and Google.