Simple Custom CSS Plugin vs Instant CSS (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Simple Custom CSS Plugin
100K+ active installs
Free
Quick Verdict
As of April 2026, Instant CSS has a higher user rating (4.9/5 from 15 reviews) while Simple Custom CSS Plugin leads in active installations (100K+ vs 4.0K+). Both are free WordPress plugins. Simple Custom CSS Plugin has accumulated 3.1M+ total downloads while Instant CSS has 14K+.
Detailed Comparison
| Metric | Simple Custom CSS Plugin | Instant CSS | |
|---|---|---|---|
| Rating | 4.7/5 | ► | 4.9/5 |
| Total Reviews | 159 | ◄ | 15 |
| Active Installs | 100K+ | ◄ | 4.0K+ |
| Total Downloads | 3.1M+ | ◄ | 14K+ |
| Support Resolution | N/A | N/A | |
| Last Updated | 1 year ago | ◄ | 2 years ago |
| First Released | 2013 | 2019 | |
| Age | 13 years | 7 years | |
| WP Requires | 3.0.1+ | false+ | |
| PHP Requires | false+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 4.0.7 | 1.2.2 |
Rating Breakdown
Simple Custom CSS Plugin
Instant CSS
Download Trends
Over the past 30 days, Simple Custom CSS Plugin averaged approximately 261 daily downloads while Instant CSS averaged 6.
Recent Reviews
Simple Custom CSS Plugin Reviews
Blocks Media view
This plugin block me from viewing my media files when I am, for instance, trying to add an image block to a page. Except for this I think it is an excellent plugin. My work-around will be to disable t
So simple yet works perfect!
İt’s so easy to use and does the job as described.
Useful but doesn’t know modern properties
Simple and useful, but modern CSS properties like clamp(), repeat(), margin-inline, or less common units like dvh throw syntax errors. For beginners, this can be really confusing.
Instant CSS Reviews
What an amazing CSS and SCSS plugin!
This plugin is really powerful, really well coded and full of useful features. A big thank you to the developer. Let’s hope it keeps getting updated.
The Best CSS Editor for WordPress
Super easy to use, dark mode, SCSS, minification. What more could you ask for?
Best css editor, when do u release the 2.0 ?
For me the best css editor plugin, like visual code but need an upgrade to be up to date 😉
More Plugins Worth Comparing
Top alternatives in the same category as Simple Custom CSS Plugin and Instant CSS
Easily add code snippets in WordPress. Insert header & footer scripts, add PHP code snippets with conditional logic, insert ads pixel code, and more.
An easy, clean and simple way to enhance your site with code snippets.
Add custom classes and ids plus first, last, even, odd, and numbered classes to your widgets.
Add CSS to your website through an admin editor, the Customizer or a metabox for page/post specific CSS.
Add custom css to the whole website and to specific posts and pages.
Style your WordPress site visually. Discover the most popular front-end design plugin! Try live demo.
Frequently Asked Questions
Is Simple Custom CSS Plugin or Instant CSS more popular?
Which has better ratings — Simple Custom CSS Plugin or Instant CSS?
Are Simple Custom CSS Plugin and Instant CSS free?
Which plugin has better support — Simple Custom CSS Plugin or Instant CSS?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.