Cache and Update Test
The "a hard refresh fixes it" inspector. When a web app keeps showing an old version even after you reload, the usual culprit is a stale service worker or Cache Storage bucket still handing back yesterday's files. This tool inspects the service workers and caches registered for the site you open it on, reports what could be serving stale content, and tells you how to force an update - without unregistering or clearing anything itself.
Read the Cache and Update Test guide for help reading the verdict or forcing an update.
desktest.net) via JavaScript in this tab. It never unregisters a worker, clears a cache, deletes data, or makes any network request. It also cannot read another site's cache - a browser only exposes each origin its own. View source to verify.Configuration
Takes about 5 seconds. Read-only: it never unregisters a worker, clears a cache, or makes a network request. Runs entirely client-side.
Diagnostic complete
Service workers registered for this site
Lists any service workers via getRegistrations(), their scope and state, whether an update is waiting, and whether one served this page.
Cache Storage buckets and storage usage
Lists Cache Storage buckets via caches.keys() and reads quota and usage from navigator.storage.estimate().