Zinn® Cache: Check whether your WordPress cache is working

Check whether your WordPress cache is working

Read the x-litespeed-cache header in your browser or on the command line to see whether a page came from the cache, and what to do when it did not.

1. Use a signed-out browser — Signed-in visitors are never served a cached page by default, so test in a private window or after signing out of WordPress.
2. Load the page twice — The first request after a purge builds the page and stores it. Reload once so the second request can be answered from the cache.
3. Read the response header — Open developer tools, choose the Network tab, select the page request and read the cache header: x-litespeed-cache on LiteSpeed, x-cache-status on nginx, x-varnish on Varnish, x-zinn-cache for the plugin's own file cache. hit means served from the cache; miss means built by WordPress.
4. Or ask from the command line — Run curl -sI followed by the page address and look for the same header. Running it twice shows the miss turning into a hit.
5. If it never says hit — Open the Status tab and press Check now: it requests your newest pages as a visitor would and shows which cache answered and how often it was a hit. Then check the Exclusions tab and your cookies — a cart or login cookie in the browser always bypasses the cache.

With screenshots: https://zinncache.com/kb/check-if-your-wordpress-cache-is-working