Cache diagnostics

Your site looks updated to you. Someone else is seeing last week's copy.

Cache is invisible until it makes you look broken. Seven layers could be holding the old copy, each with a different fix — and clearing the wrong one just wastes an afternoon. Paste a URL and find out which.


Which layer is stale?

We fetch your page as a visitor gets it, then again with caching defeated, and compare.

Public web addresses only. We read response headers and compare two fetches — nothing is stored, and we never log the URLs you check.

Get the config that prevents it

Most stale-cache problems are one missing header. Pick your server and what you want.


      

The seven layers, and how to tell them apart

Listed closest-to-reader first, which is also cheapest-to-test first.

Fix it where it lives

The checker tells you which layer is holding the old copy. These eight tell you which button clears it, taken from each vendor’s own documentation and linked so you can check.