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 4,829,240
Percentage of websites that use Cache-Control header 41.44%
Total discovered header values 30,508
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 38.69% 1,868,511 12,503
no-cache 35.08% 1,694,126 115
must-revalidate 34.40% 1,661,380 1,328
private 24.72% 1,193,898 200
no-store 23.40% 1,129,905 67
public 6.35% 306,543 4,768
s-maxage 1.81% 87,393 608
no-transform 0.53% 25,458 101
proxy-revalidate 0.40% 19,383 417
stale-while-revalidate 0.25% 12,095 123
stale-if-error 0.25% 11,963 109
max-stale <0.1% 1,470 12
immutable <0.1% 862 27
min-fresh <0.1% 48 7
only-if-cached <0.1% 1 1

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites 8,074 websites
Top 100k sites 54,814 websites
Top 1m sites 518,865 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 United States of America 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

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 14.37%
no-cache 9.51%
no-store, no-cache, must-revalidate, post-check=0, pre-check=0 9.17%
no-store, no-cache, must-revalidate 9.00%
max-age=3600 5.11%
max-age=0 4.09%
max-age=0, private, must-revalidate 3.62%
max-age=600 3.12%
private,max-age=0,must-revalidate 3.08%
no-cache, no-store, must-revalidate 2.46%
private, max-age=0 2.43%
max-age=600, must-revalidate 2.04%
no-cache, must-revalidate, max-age=0 1.73%
no-cache, no-store 1.24%
max-age=2592000 1.04%
max-age=0, no-cache, no-store, must-revalidate 1.00%
max-age=3, must-revalidate 0.96%
no-cache, must-revalidate 0.87%
no-cache, private 0.83%
public, max-age=0 0.80%