Simple Custom CSS Plugin vs RB External Thumbnail (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, RB External Thumbnail has a higher user rating (5/5 from 3 reviews) while Simple Custom CSS Plugin leads in active installations (100K+ vs 100). Both are free WordPress plugins. Simple Custom CSS Plugin has accumulated 3.1M+ total downloads while RB External Thumbnail has 3.0K+.
Detailed Comparison
| Metric | Simple Custom CSS Plugin | RB External Thumbnail | |
|---|---|---|---|
| Rating | 4.7/5 | ► | 5/5 |
| Total Reviews | 159 | ◄ | 3 |
| Active Installs | 100K+ | ◄ | 100 |
| Total Downloads | 3.1M+ | ◄ | 3.0K+ |
| Support Resolution | N/A | N/A | |
| Last Updated | 1 year ago | ◄ | 9 years ago |
| First Released | 2013 | 2015 | |
| Age | 13 years | 11 years | |
| WP Requires | 3.0.1+ | 3.0.1+ | |
| PHP Requires | false+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 4.0.7 | 1.3 |
Rating Breakdown
Simple Custom CSS Plugin
RB External Thumbnail
Download Trends
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.
RB External Thumbnail Reviews
No reviews yet
More Plugins Worth Comparing
Top alternatives in the same category as Simple Custom CSS Plugin and RB External Thumbnail
A lightweight extension of Advanced Custom Field (ACF) that adds Photo Gallery field to any post/pages on your WordPress website.
Smart Custom Fields is a simple plugin for managing custom fields.
This plugin allows Admin users to individually add HTML, custom CSS, Classes and JavaScript directly to Post, Pages or any other custom post types.
Gallery Custom Links allows you to link images to a specified URL. Tested with WordPress Gallery, Gutenberg, the Meow Gallery and others.
Generates an unlimited number of sidebars and place them on any page you wish. Go to Theme Panel > Sidebars to create your custom sidebars.
Frequently Asked Questions
Is Simple Custom CSS Plugin or RB External Thumbnail more popular?
Which has better ratings — Simple Custom CSS Plugin or RB External Thumbnail?
Are Simple Custom CSS Plugin and RB External Thumbnail free?
Which plugin has better support — Simple Custom CSS Plugin or RB External Thumbnail?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.