Check if mod_pagespeed is enabled
Find out if mod_pagespeed is working on your server in seconds, with this free tool!
How it works
Google's mod_pagespeed tool adds one of two headers to HTTP responses, depending on whether the server is Apache or Nginx.
For Apache servers, it adds:
And for Nginx servers:
You can see if mod_pagespeed is working on your site by inspecting the response headers and looking for either value, or you can use my little free tool and enter your URL below :-)
What is mod_pagespeed?
One of mod_pagespeed's greatest features is the fact that it doesn't require you to manually perform any of these tasks! Once installed, it will automatically begin optimising your website and provides you with extra configuration options should you wish for greater control over how it optimises.
Among the 40+ optimisation filters available in mod_pagespeed are:
- optimisation, compression and resizing of your images;
- cache extension, domain sharding, and domain rewriting; and