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Cloudflare Cache TTL & Cache-Control Calculator

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Build Cache-Control headers with max-age, s-maxage and stale-while-revalidate, get a Cloudflare _headers snippet, and estimate cache hit ratio and origin load.

cache-control generatorcloudflare cache ttls-maxagestale-while-revalidatecdn cache calculator
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Cache-Control header
Cloudflare _headers
Estimate origin load
Estimate assumes each URL is refetched from origin once per edge TTL in a single location (Cloudflare caches per data center, so real misses are higher, though Tiered Cache reduces them) and evenly spread traffic.
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Frequently Asked Questions
What is the difference between max-age and s-maxage?
max-age applies to browsers and all caches; s-maxage applies only to shared caches such as CDNs and overrides max-age there.
When should I use immutable?
For fingerprinted assets whose URL changes when content changes.
Is the hit-ratio exact?
No, it is a simple estimate; real ratios depend on data centers, eviction and traffic patterns.
Does Cloudflare respect these headers?
Cloudflare honours origin Cache-Control for cacheable file types, subject to your cache rules.
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