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-Control28,509,539
Percentage of websites that use Cache-Control header47.05%
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
max-age63.28%18,041,1542,404
no-cache58.00%16,535,07358
must-revalidate54.47%15,528,903553
no-store46.03%13,123,30658
private32.53%9,274,94980
public14.29%4,073,072643
s-maxage2.68%763,171492
no-transform1.57%446,60239
stale-while-revalidate0.61%173,044192
proxy-revalidate0.42%119,71561
stale-if-error0.33%94,89786
immutable0.12%33,88644
max-staleless than 0.1%8,63611
min-freshless than 0.1%2705
only-if-cachedless than 0.1%1132

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-cache10%
no-store, no-cache, must-revalidate9%
max-age=36008%
no-store, no-cache, must-revalidate, post-check=0, pre-check=07%
private5%
private, max-age=864004%
private, no-cache, no-store, must-revalidate, max-age=04%
max-age=03%
no-cache, no-store, must-revalidate3%
no-cache, must-revalidate, max-age=0, no-store, private2%
no-cache, must-revalidate, max-age=02%
no-store, max-age=01%
no-cache, private1%
private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=01%
max-age=6001%
max-age=301%
max-age=0, private, must-revalidate1%
max-age=600, must-revalidate1%
public,max-age=0,must-revalidate0%
no-store0%