Cache-Control Builder & Freshness Inspector

Compose or inspect an HTTP Cache-Control response value to understand max-age, shared-cache, revalidation, immutable, and stale directives without sending a request to a URL.

Runs locally in your browser

Response policyChoose the policy your origin response will send.

Visibility

max-age (seconds)

s-maxage (shared cache seconds)

stale-while-revalidate (seconds)

stale-if-error (seconds)

Inspect a Cache-Control valuePaste just the directive value or a complete header line.