Zinn® CacheZinn® Cache
Guides
How to set it up, how it works, and how to get the most out of it.
Getting started
- Install Zinn® Cache on a WordPress site
How to install and activate Zinn® Cache, where its settings live, and how to confirm the page cache is working. - Install Zinn® Cache Pro
Add Zinn® Cache Pro to a site that runs the free Zinn® Cache: start a trial or buy a licence, install it and activate the licence. - 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.
Everyday caching
- How to clear the cache in WordPress
Clear every cached page at once, or let the plugin clear only what changed. Where the purge button is in Zinn® Cache. - Exclude a page from the cache
Stop a page, a query parameter or a cookie from ever being cached — and the defaults that are already excluded for shops and signed-in visitors. - Set how long pages stay cached
Choose a page cache lifetime, set a different one for products or posts, and control how long browsers keep images, CSS and JavaScript. - Turn on the Redis object cache for WordPress
Install the Redis object-cache drop-in from Zinn® Cache, connect it to your Redis server, and what happens if Redis stops answering. - Use Zinn® Cache with an nginx, Varnish or Apache cache
Set up Zinn® Cache on a server where nginx, Varnish, Apache or Cloudflare already caches pages, so changed pages are purged there and updates refresh the site gradually.
Zinn® Cache Pro
- Remove unused CSS, delay JavaScript and serve WebP and AVIF
Use Zinn® Cache Pro's CSS and JavaScript tab to remove unused CSS and delay scripts, and its Images tab for WebP, AVIF and missing image sizes — why there is no minify or combine option, and how to undo a change that breaks a page. - Clean up the WordPress database
Remove post revisions, auto-drafts, expired transients and old bin and spam items with Zinn® Cache Pro's Database clean-up tab, safely. - Warm the cache after a purge
Set up Zinn® Cache Pro's warm-up so pages are rebuilt into the cache after a purge instead of waiting for a visitor.
Updates and access
- Update the plugins, or go back to an earlier version
How Zinn® Cache and Zinn® Cache Pro update, and where to download an earlier version of the free plugin if an update needs rolling back. - Open wp-admin from your dashboard
How a site hosted with Zinn Digital® opens wp-admin from the dashboard without a password, and why the link cannot be reused. - WordPress cache troubleshooting
The common reasons a page is not cached, shows old content or breaks after optimisation — and how to find which one you have.