HTTP response header

PageSpeed adds a header X-Mod-Pagespeed in Apache and X-Page-Speed in Nginx with the version of PageSpeed being used.

Header usage statistics

X-Mod-Pagespeed response header information and usage statistics.
Websites using header X-Mod-Pagespeed158,842
Percentage of websites that use X-Mod-Pagespeed header0.19%
Total discovered header values157
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

X-Mod-Pagespeed Directives

X-Mod-Pagespeed directives value information and usage statistics
DirectiveShareWebsites countUnique Values

Connected technologies

Technologies that utilize the header
Google PageSpeed, category Performance, total 720,670 websites
mod_pagespeed, category Web Server Extensions, total 158,844 websites

Websites utilizing X-Mod-Pagespeed

List of websites that use X-Mod-Pagespeed header
See full domain list

Common header values

List of top common X-Mod-Pagespeed header values
Header valueValue prevalence
Powered By mod_pagespeed3.71%
Powered By XPageSpeed2.57%
Powered By pagespeed1.73%
Powered By KingHost and mod_pagespeed0.89%
Powered By ProfesionalHosting0.25%
Powered by Scriptcase0.10%
Lightning fast by default0.10%