Cache-Control

HTTP response header

Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds

Header usage statistics

Cache-Control response header information and usage statistics.

Websites using header Cache-Control 4,747,671
Percentage of websites that use Cache-Control header 41.55%
Total discovered header values 29,807
Header uses directives Yes
Header values are unique or random No
Most popular in the country United States of America

Cache-Control Directives (15 total)

  • immutable
  • max-age
  • max-stale
  • min-fresh
  • must-revalidate
  • no-cache
  • no-store
  • no-transform
  • private
  • proxy-revalidate
  • public
  • s-maxage
  • stale-if-error
  • stale-while-revalidate
  • only-if-cached

Cache-Control Directives

Cache-Control directives value information and usage statistics

Directive Share Websites count Unique Values
max-age 36.95% 1,754,441 11,544
no-cache 32.99% 1,566,300 90
must-revalidate 31.95% 1,516,875 1,186
private 23.67% 1,123,745 179
no-store 21.62% 1,026,315 57
public 5.37% 254,769 3,537
s-maxage 1.70% 80,675 550
no-transform 0.48% 22,884 88
proxy-revalidate 0.35% 16,536 327
stale-while-revalidate 0.22% 10,392 102
stale-if-error 0.21% 9,926 90
max-stale <0.1% 1,204 10
immutable <0.1% 751 22
min-fresh <0.1% 46 6
only-if-cached <0.1% 2 2

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites 7,734 websites
Top 100k sites 54,142 websites
Top 1m sites 509,861 websites

Websites utilizing Cache-Control

List of websites that use Cache-Control header

Domain Country Rank Contacts
fonts.googleapis.com United States of America 1
twitter.com United States of America 3
google.com United States of America 5
www.youtube.com United States of America 14,442
www.facebook.com United States of America 22,750
www.twitter.com United States of America 23,353
See full domain list

Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

List of top common Cache-Control header values

Header value Value prevalence
private 14.14%
no-cache 9.74%
no-store, no-cache, must-revalidate, post-check=0, pre-check=0 9.61%
no-store, no-cache, must-revalidate 8.96%
max-age=3600 5.02%
max-age=0 4.41%
max-age=0, private, must-revalidate 3.51%
max-age=600 3.15%
private,max-age=0,must-revalidate 3.06%
private, max-age=0 2.44%
max-age=600, must-revalidate 1.94%
no-cache, no-store, must-revalidate 1.89%
no-cache, must-revalidate, max-age=0 1.64%
no-cache, no-store 1.21%
max-age=2592000 1.09%
no-cache, must-revalidate 1.05%
max-age=0, no-cache, no-store, must-revalidate 1.00%
max-age=3, must-revalidate 0.96%
public, max-age=0 0.81%
no-cache, private 0.80%