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-Pagespeed 36,309
Percentage of websites that use X-Mod-Pagespeed header 0.32%
Total discovered header values 129
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

Google PageSpeed, category Cache Tools, total 42,350 websites

Distribution by websites popularity

X-Mod-Pagespeed detection in the top websites by popularity

Top 10k sites 40 websites
Top 100k sites 451 websites
Top 1m sites 4,706 websites

Websites utilizing X-Mod-Pagespeed

List of websites that use X-Mod-Pagespeed header

Domain Country Rank Contacts
www.salesforce.com United States of America 155
www.checkpoint.com United States of America 1,136
www.regulations.gov United States of America 1,510
oglobo.globo.com Brazil 1,569
www.business-standard.com United States of America 1,969
cen.acs.org United States of America 2,404
See full domain list

Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-Mod-Pagespeed header values

Header value Value prevalence 60.48% 10.93% 7.98%
Powered By mod_pagespeed 5.45% 2.17% 2.14% 1.94%
Powered By pagespeed 1.37% 1.26% 0.86% 0.55%
Adapted For SharkSpeed 0.53%
Lightning fast by default 0.42% 0.38%
Powered By KingHost and mod_pagespeed 0.37%
Powered By ProfesionalHosting 0.31% 0.23% 0.20% 0.19% 0.18%