HTTP Cache Header Builder

Compose cache policy headers and understand freshness, revalidation, and shared-cache behavior.

Context matters: cache behavior varies by user agent, intermediary, request method, status code, authorization, cookies, and CDN configuration. This tool provides standards-oriented guidance, not a guarantee of storage or eviction.

Cache policy

Preset

Cache visibility

max-age (seconds)

s-maxage (seconds)

stale-while-revalidate

stale-if-error

Directives

no-store no-cache must-revalidate immutable

Response context

Authorization/private user data Sets a cookie CDN has separate cache rules URL changes with content

HTTP Cache Header Builder

Cache policy

Policy analysis