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 42,103,304
Percentage of websites that use Cache-Control header 41.51%
Total discovered header values 10,001
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
no-cache 54.60% 22,989,895 76
must-revalidate 49.02% 20,638,994 766
max-age 45.92% 19,335,200 5,374
no-store 37.38% 15,738,628 50
private 27.29% 11,490,611 155
public 6.47% 2,722,529 1,618
s-maxage 3.03% 1,276,711 460
no-transform 2.11% 890,000 59
proxy-revalidate 1.52% 639,093 127
stale-while-revalidate 0.28% 117,116 97
stale-if-error 0.19% 79,529 81
max-stale <0.1% 17,293 10
immutable <0.1% 13,496 24
min-fresh <0.1% 240 4
only-if-cached <0.1% 37 2

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites 7,158 websites
Top 100k sites 69,234 websites
Top 1m sites 662,160 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
google.com United States of America 3
www.google.com United States of America 3
youtube.com United States of America 6
www.youtube.com United States of America 6
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 12.74%
no-cache 12.27%
no-store, no-cache, must-revalidate, post-check=0, pre-check=0 11.01%
no-store, no-cache, must-revalidate 9.89%
max-age=3600 8.71%
max-age=0 3.90%
no-cache, no-store, must-revalidate 3.46%
private,max-age=0,must-revalidate 3.27%
no-cache, must-revalidate, max-age=0 2.40%
max-age=600 1.71%
max-age=0, private, must-revalidate 1.50%
no-cache, private 1.18%
private, no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0, s-maxage=0 1.03%
max-age=2592000 0.93%
max-age=600, must-revalidate 0.89%
max-age=0, no-cache, no-store, must-revalidate 0.87%
max-age=30 0.85%
max-age=300 0.76%
max-age=86400 0.71%
no-cache, no-store, no-transform, must-revalidate, max-age=0 0.68%