# Zinn® Cache > Zinn® Cache is a free page cache and Redis object cache for WordPress on any web server: LiteSpeed's own cache where there is one, the nginx, Varnish or Apache cache your host runs, and a fast file cache everywhere else. Zinn® Cache Pro is the paid add-on that shows what your cache is doing and makes it faster still. Both are translated into 57 languages. Zinn® Cache is a product of Zinn Digital (https://zinndigital.com). This site is published in 58 languages; the English pages are listed below and every other language is linked from each page's hreflang alternates and from /sitemap.xml. Founded by Neil Lock — https://neillock.dev/ ## Pages - [Zinn® Cache](https://zinncache.com/) - [Features](https://zinncache.com/features) - [Pricing](https://zinncache.com/pricing) - [Guides](https://zinncache.com/kb) - [Zinn® Cache or Zinn® Cache Pro: what does Pro add?](https://zinncache.com/which-zinn-cache-plugin-do-i-need): Zinn® Cache is the free page cache and object cache. Zinn® Cache Pro is a paid add-on that installs on top of it, for analytics, a slow-query finder, a faster object cache and lighter pages. - [WordPress cache benchmark: a cached page against an uncached one](https://zinncache.com/wordpress-cache-benchmark): Measured time to first byte for one WordPress page on Zinn Digital® hosting with Zinn® Cache: 60 cached hits against 60 requests that bypassed the cache. - [WordPress speed test: the same page with Zinn® Cache off and on](https://zinncache.com/wordpress-cache-speed-test): The same WordPress pages measured with the page cache off and on: mobile Lighthouse, median of 5 runs, dated. Then time both yourself from your own browser. - [Try Zinn® Cache free in your browser](https://zinncache.com/live-demo): Start a real WordPress site in your browser with the free Zinn® Cache plugin already installed. No sign-up, nothing to download, gone when you close the tab. - [Use cases](https://zinncache.com/use-cases): How the cache plugins handle shops, busy publishing sites and membership sites — the three kinds of WordPress site where caching goes wrong most often. - [A WooCommerce cache that never caches a cart](https://zinncache.com/use-cases/woocommerce-cache-plugin): Cart, checkout and account pages and every shopper with items in the basket are excluded by default, so product pages can be cached hard. - [Caching for a site that publishes all day](https://zinncache.com/use-cases/cache-plugin-for-news-sites-and-blogs): Short lifetimes, purge on publish and a comment switch for busy threads — how to cache a news site or blog without serving yesterday's front page. - [Caching a membership or course site safely](https://zinncache.com/use-cases/cache-plugin-for-membership-sites): Signed-in members always get a freshly built page by default. When that is safe to change, and what to exclude when it is not. - [Compare WordPress cache plugins](https://zinncache.com/compare-wordpress-cache-plugins): Zinn® Cache, free, and its Pro add-on against WP Rocket, LiteSpeed Cache, W3 Total Cache, WP Super Cache, NitroPack, WP Fastest Cache and FlyingPress: price, server needs and features, every claim sourced. - [A free WP Rocket alternative](https://zinncache.com/compare-wordpress-cache-plugins/wp-rocket-alternative): WP Rocket is a paid plugin. Zinn® Cache is free on any server, with a paid Pro add-on for analytics and optimisation. Here is how they differ. - [LiteSpeed Cache or Zinn® Cache?](https://zinncache.com/compare-wordpress-cache-plugins/litespeed-cache-alternative): LiteSpeed Cache is built around LiteSpeed servers and QUIC.cloud. Zinn® Cache uses LiteSpeed's cache where it exists and its own file cache everywhere else. Which to choose. - [A W3 Total Cache alternative](https://zinncache.com/compare-wordpress-cache-plugins/w3-total-cache-alternative): W3 Total Cache offers many storage backends and CDN integrations. Zinn® Cache keeps the settings small and uses LiteSpeed's server-level cache where it can. How they compare. - [A WP Super Cache alternative with an object cache](https://zinncache.com/compare-wordpress-cache-plugins/wp-super-cache-alternative): WP Super Cache writes static HTML files. Zinn® Cache adds a Redis object cache and purging by tag, and its Pro add-on adds warm-up and asset optimisation. - [A NitroPack alternative that runs on your own server](https://zinncache.com/compare-wordpress-cache-plugins/nitropack-alternative): NitroPack is a cloud service priced by monthly pageviews. Zinn® Cache is a free plugin that caches on your own server with no pageview limits. How they compare. - [A WP Fastest Cache alternative](https://zinncache.com/compare-wordpress-cache-plugins/wp-fastest-cache-alternative): WP Fastest Cache is a popular free static-file cache. Zinn® Cache adds a Redis object cache, purging by tag and LiteSpeed's server cache. How they compare. - [A free FlyingPress alternative](https://zinncache.com/compare-wordpress-cache-plugins/flyingpress-alternative): FlyingPress is a paid speed plugin with a 14-day trial. Zinn® Cache is free for good, with a paid Pro add-on only if you want it. How they compare. - [Install Zinn® Cache on a WordPress site](https://zinncache.com/kb/install-zinn-cache): How to install and activate Zinn® Cache, where its settings live, and how to confirm the page cache is working. - [Install Zinn® Cache Pro](https://zinncache.com/kb/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](https://zinncache.com/kb/check-if-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. - [How to clear the cache in WordPress](https://zinncache.com/kb/how-to-clear-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](https://zinncache.com/kb/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](https://zinncache.com/kb/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](https://zinncache.com/kb/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](https://zinncache.com/kb/wordpress-cache-with-nginx-varnish-or-cloudflare): 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. - [Remove unused CSS, delay JavaScript and serve WebP and AVIF](https://zinncache.com/kb/minify-css-and-javascript-in-wordpress): 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](https://zinncache.com/kb/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](https://zinncache.com/kb/warm-the-cache-with-a-crawler): Set up Zinn® Cache Pro's warm-up so pages are rebuilt into the cache after a purge instead of waiting for a visitor. - [Update the plugins, or go back to an earlier version](https://zinncache.com/kb/update-or-roll-back-the-cache-plugins): 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](https://zinncache.com/kb/one-click-wordpress-admin-login): 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](https://zinncache.com/kb/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. ## The platform - [Zinn Digital hosting](https://zinndigital.com/hosting) - [Zinn® Cache on zinndigital.com](https://zinndigital.com/wordpress-plugins)