Prime Cache – Page Cache on Activation & One-Click Speed Optimization

Activate Prime Cache and your pages are cached. There is no setup screen to get through first and no wp-config.php to edit.

When you want more, one button, Auto, applies a set of speed settings in one go: HTML, CSS and JavaScript minification, deferred JavaScript, non-blocking CSS, lazy loading, browser caching, link prefetching and cache preloading. Every setting stays on its own screen afterwards, so you can review or change any of them.

Watch the 5-minute setup tutorial:

How it works without any setup

Page caching is on from the moment you activate the plugin. Prime Cache runs its page-cache engine early in each request and sends the stored copy of a page instead of building it again, so the theme and the database queries behind the page are skipped. Logged-in users, the admin screens, form submissions and WooCommerce cart, checkout and account pages are never served from the cache.

Two faster serving paths are optional:

• .htaccess Optimization (servers that read .htaccess): cached pages are sent by the web server without starting PHP. Turn it on in the Page Cache tab, or let Auto turn it on when .htaccess is writable.
• Drop-in mode : add define( 'WP_CACHE', true ); to wp-config.php yourself and cached pages are served before WordPress core loads. The settings screen shows the exact line.

The free plugin never edits wp-config.php. That file controls the whole site and some hosts manage it themselves, so an automatic edit is a risk the plugin does not take. The drop-in step stays in your hands, and page caching works without it.

Prime Cache is developed and run on shared hosting.

If something looks wrong after Auto

Auto’s JavaScript and CSS settings do the most for speed, and they are also the ones most likely to disagree with a theme or another plugin. Menus, sliders and forms are where problems usually show.

The quickest fix is the Safe preset in the Tools tab. It keeps page caching, browser caching and lazy loading, and turns off minification, deferred and delayed JavaScript, the CSS delivery settings and the other Auto settings that change how a page looks, including any you turned on yourself. The preset card in the Tools tab lists every setting it turns off. Clear the cache and check the page again.

To keep the rest of Auto and find the one setting that disagrees, apply Auto again and turn settings off in this order instead, clearing the cache after each step:

1. 01Delay JavaScript Execution and Maximum Delay , if you turned them on yourself. Auto does not turn them on in the free plugin.