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 4,684,428
Percentage of websites that use Cache-Control header 43.10%
Total discovered header values 30,638
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
  • 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

Directive Share Websites count Unique Values
max-age 41.57% 1,947,549 12,973
must-revalidate 37.10% 1,737,870 1,501
no-cache 37.07% 1,736,568 106
private 25.60% 1,199,312 245
no-store 24.73% 1,158,608 68
public 6.87% 321,614 4,784
s-maxage 1.99% 93,448 653
no-transform 0.85% 39,836 94
proxy-revalidate 0.42% 19,704 409
stale-while-revalidate 0.29% 13,424 129
stale-if-error 0.28% 12,896 119
max-stale <0.1% 1,364 14
immutable <0.1% 791 29
min-fresh <0.1% 49 7
only-if-cached <0.1% 6 1

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites 8,084 websites
Top 100k sites 53,569 websites
Top 1m sites 507,998 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
www.facebook.com Ireland 2
twitter.com United States of America 3
youtube.com United States of America 4
www.youtube.com United States of America 4
google.com United States of America 5
See full domain list
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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 value Value prevalence
private 13.53%
no-store, no-cache, must-revalidate 9.21%
no-cache 8.89%
no-store, no-cache, must-revalidate, post-check=0, pre-check=0 8.37%
max-age=3600 5.25%
max-age=0 4.08%
max-age=0, private, must-revalidate 3.78%
private,max-age=0,must-revalidate 3.10%
max-age=600 2.66%
private, max-age=0 2.57%
no-cache, must-revalidate, max-age=0 2.50%
no-cache, no-store, must-revalidate 2.23%
max-age=600, must-revalidate 2.14%
no-cache, no-store 1.30%
max-age=3, must-revalidate 1.02%
max-age=0, no-cache, no-store, must-revalidate 1.00%
max-age=2592000 1.00%
no-cache, no-store, max-age=0, must-revalidate 0.90%
no-cache, private 0.90%
no-cache, must-revalidate 0.85%