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
Tells all caching mechanisms from server to client whether they may cache this object. It is measured in seconds
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 | ![]() |
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 |
Top 10k sites | 8,074 websites |
Top 100k sites | 54,814 websites |
Top 1m sites | 518,865 websites |
Domain | Country | Rank | Contacts |
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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% |