Premium version:
The difference between the standard and premium versions is only in the number of available features. Below are the feature lists for both versions.
Standard version features: WebP conversion, Image optimization.
Premium version features: WebP conversion, Image optimization, Retina versions (2x and 3x), Alt text generation, Schema.org microdata addition, Responsive images creation, Width and height image attributes addition, Metadata addition (IPTC), LQIP.
