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 | 37,516,780 |
| Percentage of websites that use Cache-Control header | 46.43% |
| Total discovered header values | More than 10,000 |
| Header uses directives | Yes |
| Header values are unique or random | No |
| Most popular in the country |  United States |
Cache-Control Directives
Cache-Control directives value information and usage statistics| Directive | Share | Websites count | Unique Values |
|---|---|---|---|
| no-cache | 56.31% | 21,124,806 | 68 |
| max-age | 53.08% | 19,913,420 | 3,339 |
| must-revalidate | 48.54% | 18,212,062 | 552 |
| no-store | 35.54% | 13,332,249 | 46 |
| private | 18.91% | 7,093,674 | 89 |
| public | 11.80% | 4,428,107 | 721 |
| no-transform | 3.14% | 1,178,736 | 35 |
| s-maxage | 2.65% | 995,129 | 414 |
| proxy-revalidate | 0.94% | 352,696 | 66 |
| stale-while-revalidate | 0.29% | 109,429 | 124 |
| stale-if-error | 0.17% | 62,093 | 80 |
| immutable | <0.1% | 29,764 | 33 |
| max-stale | <0.1% | 12,025 | 11 |
| min-fresh | <0.1% | 238 | 6 |
| only-if-cached | <0.1% | 203 | 3 |
Cache-Control header usage distribution by website rank
Geographical Distribution
Header usage distribution by websites across the globe.Websites utilizing Cache-Control
List of websites that use Cache-Control header| Domain | Country | Rank | Contacts |
|---|---|---|---|
| United States | 1 | ||
| United States | 2 | ||
| United States | 3 | ||
| United States | 3 | ||
| United States | 6 | ||
| United States | 6 |
Common header values
List of top common Cache-Control header values| Header value | Value prevalence |
|---|---|
| no-cache | 14.02% |
| no-store, no-cache, must-revalidate | 9.95% |
| no-store, no-cache, must-revalidate, post-check=0, pre-check=0 | 8.37% |
| max-age=3600 | 7.42% |
| private | 7.04% |
| public,max-age=0,must-revalidate | 4.86% |
| no-cache, must-revalidate, max-age=0 | 4.59% |
| no-cache, no-store, must-revalidate | 4.00% |
| max-age=0 | 3.47% |
| max-age=0, private, must-revalidate | 2.07% |
| no-store, max-age=0 | 1.57% |
| max-age=600 | 1.51% |
| no-cache, private | 1.48% |
| private, max-age=86400 | 1.43% |
| no-cache, no-store, no-transform, must-revalidate, max-age=0 | 1.05% |
| max-age=600, must-revalidate | 1.02% |
| max-age=0, no-cache, no-store, must-revalidate | 0.85% |
| max-age=3, must-revalidate | 0.85% |
| max-age=30 | 0.84% |
| public, max-age=0 | 0.71% |