You can check out examples of some of our most useful filters here.

You can also preview your own website optimized with PageSpeed here.

Page rendering speed

Optimizations aiming to improve page rendering speed, by prioritizing visible content and re-sequencing loading and execution of assets referenced in HTML.

Optimize caching

Optimizations that maximize use of browser- and proxy-caches.

Reduce latency

Optimizations that improve latency, or decrease the impact of requests with high latency on total page load time.

Image optimization

Optimizations for GIF, JPEG, PNG, and WebP image formats.

Reduce roundtrips

Speed up downloading of pages by reducing the amount of requests needed.

Reduce size

Reduce the amount of data that has to be transferred.

Other filters

Other filters - not classified (yet).

Bold filters are in the core filter set - which is enabled by default

This documentation is a mashed up version of the documentation for mod_pagespeed and ngx_pagespeed, found at https://developers.google.com/speed/pagespeed/module/filters