/ Plugin Category

/ Performance & Optimization

/ Caching Solutions

/ CSS JS Manager, Async JavaScript, Defer Render Blocking CSS

CSS JS Manager, Async JavaScript, Defer Render Blocking CSS

By PI Web Solution

Performance & Optimization / Caching Solutions

Reviewed by Omar Dabbas

Trusted WordPress expert with 20+ years of experience evaluating plugins for the WP ecosystem.

CSS JS Manager, Async JavaScript, Defer Render Blocking CSS Review - In-Depth Analysis

Manage CSS and JS loading for better site performance. Defer render blocking CSS and load scripts asynchronously. Optimize your site for speed with critical CSS.

Performance Overview

WPS Score

6.71/10

User Rating

4.8/5 (based on 90+ reviews)

Active Installations

1,000+

Update Frequency

Below Average It is calculated using the weighted average of same category plugins.

Security Score

5 / 10 (Medium Risk) It is calculated using the weighted average of all versions.

What It Does

This plugin allows you to manage the loading of CSS and JavaScript on your website to enhance performance. You can load or remove CSS or JS based on whether the request is from a mobile or desktop device. Additionally, it offers options to defer loading of CSS files and load any JS file asynchronously or defer it.

With this plugin, you can remove any JavaScript or CSS from all pages or selectively based on various conditions such as post type or page ID. You can also manage critical CSS for different pages, posts, or custom post types to optimize your site for speed.

Instructions for using critical CSS are provided, including how to generate critical CSS using external tools. The plugin also includes video tutorials for removing CSS files and deferring render-blocking CSS.

Comparing to Alternatives

CSS JS Manager, Async JavaScript, Defer Render Blocking CSS is a popular plugin in its category with several notable alternatives available for users seeking similar functionality.

Top alternatives

Strengths

Highly effective at deferring scripts automatically added by other plugins
Lightweight and simple to use, minimizing site overhead
Clean and intuitive interface appreciated by users
Consistently high user ratings indicating reliability
Good for managing both CSS and JavaScript optimization

Weaknesses

Has had a medium severity security vulnerability in the past (CSRF) though it has been fixed
No pro version available, limiting advanced feature options
Does not refresh latest reviews in the plugin interface as noted by some users
Some users may prefer plugins with broader optimization features

User Sentiment Analysis

With a strong 4.8 out of 5 rating from 90 users and very few low ratings, the plugin enjoys overwhelmingly positive feedback.

Positive highlights

'Great for deferring auto added scripts' - glyderau
'Awesome little plugin, simple and works great!' - thomas20ss
'The plugin works fine' - krzysztofsojski
'Simple and useful, switched from another plugin and happy' - cezaro
'Excelente herramienta y muy intuitiva' - adrian

Common complaints

Weaknesses

Past security vulnerability (CSRF) noted, though fixed
Lack of a pro version limits advanced functionality
Does not update latest reviews in plugin interface

Who Should Use This?

Best for

Users looking for a lightweight, straightforward plugin to defer JavaScript and CSS loading with minimal configuration and good automatic handling of scripts added by other plugins.

Not ideal for

Users requiring advanced optimization features beyond deferring scripts or those concerned about past security issues might prefer alternatives with ongoing premium support and broader capabilities.

Pricing & Value

Free version includes

The free version offers comprehensive script deferring capabilities and is sufficient for most users seeking to improve page load times.

Final Verdict

CSS JS Manager, Async JavaScript, Defer Render Blocking CSS is a highly rated and effective plugin for deferring JavaScript and CSS to improve site performance. Its simplicity and lightweight design make it an excellent choice for users seeking straightforward optimization without complexity.

However, users should be aware of its past security vulnerability, which has been addressed, and the absence of a pro version may limit advanced features. Considering available alternatives may be beneficial for those needing more comprehensive optimization solutions.

Other Notable Features

Here are a few other notable features of this free CSS JS Manager, Async JavaScript, Defer Render Blocking CSS plugin.

Async Css

Async Js

Defer Css

Defer Js

Pagespeed

Screenshots

FAQ

Copy the URL of this file without the query string variable ( without this “?ver=5.0.3“
URL: http://localhost/telco/wp-content/themes/twentyseventeen/style.css
Now Open the CSS JS Manager
Click on “Add New Resource”
Now add the URL from the Step 2
Set method as “Async“
Selection Logic “Add This“
On All Pages