You can see the complete list of filters (40+) here: https://developers.google.com/speed/docs/mod_pagespeed/config_filters?hl=nl https://developers.google.com/s

You can see the complete list of filters (40+) here: https://developers.google.com/speed/docs/mod_pagespeed/config_filters?hl=nl https://developers.google.com/speed/docs/mod_pagespeed/confi... Note that docs above are for mod_pagespeed (Apache), but all of the same filters are available in nginx port as well - it's the same C++ code under the hood. In a nutshell: HTML, CSS, JS, and image optimization (resizing, recompression, WebP, auto-spriting, etc...) Configuring ngx_pagespeed: https://github.com/pagespeed/ngx_pagespeed#how-to-use https://github.com/pagespeed/ngx_pagespeed#how-to-use