Browser and CDN cache audit

Cache-Control Header Checker

Understand whether a URL can be cached, for how long and why a CDN may report a hit, miss or bypass.

Free to use No account required

Inspect HTTP caching behavior

The audit parses Cache-Control and reports Age, CDN cache status, validators, expiry, Vary and other cache-related headers.

Set deliberate browser and shared-cache lifetimes, retain validators where useful and investigate unexpected bypass or no-store responses.

One request cannot prove every cache node is configured identically or predict a later hit after cache warming.

The audit parses Cache-Control and reports Age, CDN cache status, validators, expiry, Vary and other cache-related headers.

One request cannot prove every cache node is configured identically or predict a later hit after cache warming.

What does this tool check?

The audit parses Cache-Control and reports Age, CDN cache status, validators, expiry, Vary and other cache-related headers.

How should I use the result?

Set deliberate browser and shared-cache lifetimes, retain validators where useful and investigate unexpected bypass or no-store responses.

What are the limits?

One request cannot prove every cache node is configured identically or predict a later hit after cache warming.