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-Control33,187,061
Percentage of websites that use Cache-Control header49.72%
Total discovered header valuesMore than 10,000
Header uses directivesYes
Header values are unique or randomNo
Most popular in the country United States

Cache-Control directives (15 total)

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

Cache-Control Directives

Cache-Control directives value information and usage statistics
DirectiveShareWebsites countUnique Values
no-cache59.22%19,652,75168
max-age58.76%19,499,3502,793
must-revalidate53.00%17,590,605547
no-store38.17%12,666,67543
private22.07%7,324,07690
public12.96%4,301,642662
no-transform3.73%1,236,80934
s-maxage2.32%771,480423
proxy-revalidate0.52%171,80662
stale-while-revalidate0.35%117,406117
stale-if-error0.18%60,89279
immutable<0.1%32,80633
max-stale<0.1%11,62410
min-fresh<0.1%2265
only-if-cached<0.1%1353

Websites utilizing Cache-Control

List of websites that use Cache-Control header
DomainCountryRankContacts
fonts.googleapis.com United States1
facebook.com United States2
google.com United States3
wordpress.org United States4
youtube.com United States6
twitter.com United States7
See full domain list

Common header values

List of top common Cache-Control header values
Header valueValue prevalence
no-cache13.77%
no-store, no-cache, must-revalidate10.03%
max-age=36008.53%
no-store, no-cache, must-revalidate, post-check=0, pre-check=08.52%
private7.27%
no-cache, must-revalidate, max-age=05.17%
no-cache, no-store, must-revalidate3.40%
private, max-age=864003.24%
max-age=03.18%
max-age=0, private, must-revalidate2.36%
no-store, max-age=01.82%
max-age=6001.53%
no-cache, private1.50%
no-cache, no-store, no-transform, must-revalidate, max-age=01.25%
max-age=600, must-revalidate1.03%
max-age=300.97%
max-age=0, no-cache, no-store, must-revalidate0.88%
max-age=3, must-revalidate0.87%
no-cache, no-store, must-revalidate, max-age=00.76%
no-store0.76%