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 20,382,196
Percentage of websites that use Cache-Control header 38.01%
Total discovered header values 70,432
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 19.61% 3,997,737 73
must-revalidate 17.16% 3,496,928 581
max-age 15.94% 3,248,785 5,492
no-store 13.98% 2,849,698 43
private 8.59% 1,751,308 131
public 2.50% 509,920 1,796
s-maxage 0.80% 162,135 216
stale-while-revalidate 0.69% 141,436 81
no-transform 0.42% 86,266 60
proxy-revalidate 0.20% 41,441 143
stale-if-error <0.1% 16,857 78
max-stale <0.1% 2,414 9
immutable <0.1% 480 24
min-fresh <0.1% 41 3
only-if-cached <0.1% 8 2

Distribution by websites popularity

Cache-Control detection in the top websites by popularity

Top 10k sites 7,877 websites
Top 100k sites 51,155 websites
Top 1m sites 483,301 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
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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
no-store, no-cache, must-revalidate, post-check=0, pre-check=0 12.60%
private 10.89%
no-store, no-cache, must-revalidate 10.88%
no-cache 10.81%
max-age=3600 4.55%
max-age=0 4.32%
no-cache, no-store, must-revalidate 4.10%
no-cache, must-revalidate, max-age=0 3.10%
max-age=600 1.81%
private,max-age=0,stale-while-revalidate=60 1.65%
max-age=0, private, must-revalidate 1.60%
no-store, max-age=0 1.52%
max-age=600, must-revalidate 1.33%
private, max-age=0 1.28%
max-age=0, no-cache, no-store, must-revalidate 1.12%
max-age=2592000 1.05%
no-cache, private 1.00%
private,max-age=0,must-revalidate 0.91%
no-cache, must-revalidate 0.83%
private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0 0.82%