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
HTTP response headerTells 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 | 41,349,030 |
| Percentage of websites that use Cache-Control header | 43.35% |
| Total discovered header values | More than 10,000 |
| Header uses directives | Yes |
| Header values are unique or random | No |
| Most popular in the country |  US |
Cache-Control Directives
Cache-Control directives value information and usage statistics| Directive | Share | Websites count | Unique Values |
|---|---|---|---|
| no-cache | 56.80% | 23,486,776 | 65 |
| must-revalidate | 50.94% | 21,062,415 | 513 |
| max-age | 49.44% | 20,443,034 | 3,483 |
| no-store | 37.29% | 15,420,936 | 47 |
| private | 26.42% | 10,923,885 | 105 |
| public | 6.56% | 2,711,999 | 757 |
| s-maxage | 4.50% | 1,860,484 | 349 |
| no-transform | 2.65% | 1,094,059 | 39 |
| proxy-revalidate | 1.91% | 791,605 | 72 |
| stale-while-revalidate | 0.26% | 108,980 | 97 |
| stale-if-error | 0.21% | 85,255 | 78 |
| max-stale | <0.1% | 21,756 | 10 |
| immutable | <0.1% | 20,896 | 26 |
| min-fresh | <0.1% | 230 | 4 |
| only-if-cached | <0.1% | 183 | 2 |
Distribution by websites popularity
Cache-Control detection in the top websites by popularity| Top 10k sites | 7,261 websites |
| Top 100k sites | 69,910 websites |
| Top 1m sites | 669,840 websites |
Websites utilizing Cache-Control
List of websites that use Cache-Control header| Domain | Country | Rank | Contacts |
|---|---|---|---|
| US | 1 | ||
| US | 2 | ||
| US | 3 | ||
| US | 3 | ||
| US | 6 | ||
| US | 6 |
Flat price per the report, subscription is not required.
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-cache | 13.44% |
| no-store, no-cache, must-revalidate | 10.00% |
| no-store, no-cache, must-revalidate, post-check=0, pre-check=0 | 9.87% |
| private | 9.50% |
| max-age=3600 | 6.08% |
| private,max-age=0,must-revalidate | 4.72% |
| no-cache, no-store, must-revalidate | 3.67% |
| max-age=0 | 3.54% |
| no-cache, must-revalidate, max-age=0 | 3.09% |
| max-age=0, private, must-revalidate | 2.19% |
| max-age=600 | 1.60% |
| private, no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0, s-maxage=0 | 1.52% |
| no-cache, private | 1.32% |
| private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0 | 1.05% |
| max-age=172800, s-maxage=172800 | 0.98% |
| max-age=600, must-revalidate | 0.93% |
| max-age=0, no-cache, no-store, must-revalidate | 0.89% |
| max-age=30 | 0.80% |
| max-age=300 | 0.79% |
| max-age=2592000 | 0.73% |