Is Critical CSS and Javascript free?

Yes, Critical CSS and Javascript is free to use. It is available as a free plugin on WordPress.org.

How many websites use Critical CSS and Javascript?

Critical CSS and Javascript has 10 active installations as tracked by WordPress.org.

What are the best Critical CSS and Javascript alternatives?

Popular alternatives to Critical CSS and Javascript include Page Speed Optimizer: HTTP/2 Push…, CSS JS Manager, Async JavaScript, Defer…, Defer CSS Addon for BWP Minify. You can compare them side-by-side on our comparison pages.

Does Critical CSS and Javascript work with the latest WordPress?

Critical CSS and Javascript has been tested up to WordPress 5.4.19. It requires WordPress 5.0+ and PHP 7.0+.

PluginSift

Critical CSS and Javascript

Name: Critical CSS and Javascript
Rating: 1 (1 reviews)
Author: teamperformance

Defer render blocking CSS and Javascript with the best Critical-CSS WordPress plugin

By teamperformance·Defer CSS·Free

1(1 reviews)

·10 active installs·Updated 6 years ago

Download Compare

As of April 2026, Critical CSS and Javascript is a WordPress defer css plugin with 10 active installations and a 1/5 rating from 1 reviews. It has been downloaded 3.3K+ times in total. Requires WordPress 5.0+ and PHP 7.0+. Available on WordPress.org since 2020. Last updated 6 years ago — may have compatibility concerns. Top alternative: Page Speed Optimizer: HTTP/2 Push….

1/51 reviews

10active installs

3.3K+total downloads

6 yearssince 2020

Overview

Critical CSS and Javascript

This Critical CSS plugin was built exclusively to help you remove render-blocking resources such as CSS and Javascript. We use best practices to cautiously update your website scripts to load after your markup has completed loading.

Our plugin also has the ability to defer scripts that are inline which tend to cause trouble when you defer their dependent scripts. We do this to ensure that your inline scripts will not break functionality on your site, while allowing you to benefit from the performance gains.