Autoptimize criticalcss.com power-up adds automated critical css creation to Autoptimize integrating with the https://criticalcss.com service.

PageSpeed

PageSpeed Ninja – Cache, Minify, Defer CSS JavaScript, Critical CSS, Optimize Images, Convert WebP

Boost page speed: cache, compress, optimize images to WebP, minify CSS/JS, defer loading, lazy load, generate critical CSS, improve Core Web Vitals

Frank Goossens

Deny Dias

This plugin extends Autoptimize to automatically create critical CSS rules. These rules inject the correct critical CSS in different types of pages to ensure these pages are rendered even before the full CSS is loaded, improving the “start to render time” and user experience. For this purpose the plugin integrates with criticalcss.com, a 3rd party service, to have it generate the critical CSS (see <a href="https://wordpress.org/plugins/autoptimize-criticalcss/#faq">FAQ for info on pricing</a>).
Simply install and activate the plugin (you will need to have Autoptimize up and running), enter your <a href="https://criticalcss.com/?aff=1" rel="nofollow ugc">https://criticalcss.com</a> API key and the plugin will automatically start work to create rules.
If you want to change settings or review the rules, you can find these by clicking the “critical css” tab on the Autoptimize plugin settings screen. There are “installation instructions” and more info in <a href="https://wordpress.org/plugins/autoptimize-criticalcss/#faq">the FAQ</a>.

Autoptimize criticalcss.com power-up

Its configuration definitely has a learning curve, but when you get the hang of it, this plugin becomes essential to your website!

Alternatives to Autoptimize criticalcss.com power-up

Top alternatives