I used to work on mod_pagespeed / ngx_pagespeed, and I'm very proud of our image optimization: https://modpagespeed.com/doc/filter-image-optimize https://modpag

I used to work on mod_pagespeed / ngx_pagespeed, and I'm very proud of our image optimization: https://modpagespeed.com/doc/filter-image-optimize https://modpagespeed.com/doc/filter-image-optimize It compresses and optimizes png, gif, and jpeg, creates webp for browsers that support it, inlines small images into your html, longcaches images, and even creates srcsets.