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-Control41,349,030
Percentage of websites that use Cache-Control header43.35%
Total discovered header valuesMore than 10,000
Header uses directivesYes
Header values are unique or randomNo
Most popular in the country US

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-cache56.80%23,486,77665
must-revalidate50.94%21,062,415513
max-age49.44%20,443,0343,483
no-store37.29%15,420,93647
private26.42%10,923,885105
public6.56%2,711,999757
s-maxage4.50%1,860,484349
no-transform2.65%1,094,05939
proxy-revalidate1.91%791,60572
stale-while-revalidate0.26%108,98097
stale-if-error0.21%85,25578
max-stale<0.1%21,75610
immutable<0.1%20,89626
min-fresh<0.1%2304
only-if-cached<0.1%1832

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites7,261 websites
Top 100k sites69,910 websites
Top 1m sites669,840 websites

Websites utilizing Cache-Control

List of websites that use Cache-Control header

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Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

List of top common Cache-Control header values

Header valueValue prevalence
no-cache13.44%
no-store, no-cache, must-revalidate10.00%
no-store, no-cache, must-revalidate, post-check=0, pre-check=09.87%
private9.50%
max-age=36006.08%
private,max-age=0,must-revalidate4.72%
no-cache, no-store, must-revalidate3.67%
max-age=03.54%
no-cache, must-revalidate, max-age=03.09%
max-age=0, private, must-revalidate2.19%
max-age=6001.60%
private, no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0, s-maxage=01.52%
no-cache, private1.32%
private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=01.05%
max-age=172800, s-maxage=1728000.98%
max-age=600, must-revalidate0.93%
max-age=0, no-cache, no-store, must-revalidate0.89%
max-age=300.80%
max-age=3000.79%
max-age=25920000.73%