Cache-Control Header Generator

Generate a cache policy, then analyze it with Age, Expires and validators before you deploy it.

Base caching mode

max-age seconds

s-maxage seconds

stale-while-revalidate

stale-if-error

Flags must-revalidate immutable

ReadyGenerates response directives only; actual cacheability also depends on request method, status, other response fields, and cache implementation.

Local analysis is not remote verification

Unless a tool explicitly has a direct-fetch action, these HTTP tools do not contact endpoints. Browser fetch cannot bypass CORS, and generated policy text does not prove how a deployed server, browser, proxy or CDN will behave.