Edge caching toolbox

Surrogate-Control Header Builder & CDN Cache Planner

Separate edge cache behavior from browser cache policy. Build a valid Surrogate-Control header, compare TTLs, model stale windows, and copy deployment snippets for your stack.

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Header builder

CDN / reverse proxy focused

Browser Cache-Control max-age (seconds) CDN Surrogate max-age (seconds)

stale-while-revalidate (seconds) stale-if-error (seconds)

Content type Traffic pattern Origin tolerance for staleness

Include no-store
Use when the edge must never store the response. Include no-cache
Storeable, but must revalidate before reuse. Response is user-specific / personalized
Planner warns if you accidentally cache personalized content at the edge. Origin varies on Cookie / Authorization
Signals a high cache-key explosion risk or unsafe caching path.

Notes / route description

Generated output

Surrogate-Control

Suggested Cache-Control

Surrogate-Control Header Builder & CDN Cache Planner

Header builder

Generated output

Cache behavior timeline

Implementation snippets