Blocks CSS vs Simple Custom CSS and JS (September 2026)
Updated September 7, 2026 · Data from WordPress.org, refreshed daily · How this works
Both rank in the WordPress.org Custom CSS Plugins top 10: Blocks CSS at #5 and Simple Custom CSS and JS at #1. Simple Custom CSS and JS leads on 4 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
Blocks CSS
Blocks CSS: CSS Editor for Gutenberg Blocks
Blocks CSS allows you add custom CSS to your Blocks straight from the Block Editor (Gutenberg).
Simple Custom CSS and JS
Easily add Custom CSS or JS to your website with an awesome editor.
Who leads on what
Simple Custom CSS and JS leads on 4 of the 5 measures we track.
Simple Custom CSS and JS ranks higher on WordPress.org: #1 against #5 in Custom CSS Plugins.
Simple Custom CSS and JS has more users: 600,000+ active installs against 5,000+.
Not enough reviews to compare ratings fairly: Blocks CSS has 25, Simple Custom CSS and JS has 103. We compare ratings only above 50 reviews each.
Simple Custom CSS and JS has more reviews behind its score: 103 against 25.
Simple Custom CSS and JS was updated more recently, on August 20, 2026; Blocks CSS on August 12, 2026.
Which one to pick
Each plugin is the better answer for the measure it actually leads on. Nothing here is a recommendation we invented.
Blocks CSS
Blocks CSS does not lead on any measure we track, so pick it only for something these numbers cannot show, such as a feature you need.
Simple Custom CSS and JS
Pick Simple Custom CSS and JS if you go by where WordPress.org itself puts them, you want the plugin more sites already run, you want the score backed by more reviews or you want the one shipping releases most recently.
Blocks CSS vs Simple Custom CSS and JS side by side
| Blocks CSS | Simple Custom CSS and JS | |
|---|---|---|
| Custom CSS Plugins ranking | #5 | #1 |
| Rating | 4.9 | 4.4 |
| Reviews | 25 | 103 |
| Active installs | 5,000+ | 600,000+ |
| Total downloads | 219,184 | 10,900,219 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 12, 2026 | Aug 20, 2026 |
| First published | Feb 14, 2019 | Dec 7, 2015 |
| Tested up to WordPress | 7.0.4 | 7.1 |
| Requires PHP | 5.4 | 5.2.4 |
| Pricing | Free on WordPress.org | Free on WordPress.org |
30-day download figures appear after both plugins have 30 days of tracking.
Blocks CSS ratings
Simple Custom CSS and JS ratings
How we compare these two
Every figure here is pulled from the WordPress.org plugin API every day at 03:00 UTC, for both plugins in the same run, so the two are always read on the same day. We compare only what the directory reports: active installs, the rating and how many reviews stand behind it, the last release date and, once we have a month of history, downloads over the last 30 days. Ratings are only called a win above 50 reviews each, because a handful of five-star reviews is not evidence. Nothing is weighted into an overall score, no measure is worth more than another, and neither Blocks CSS nor Simple Custom CSS and JS can pay to appear here: the pair exists only because both plugins reached the Custom CSS Plugins top 10. Full methodology.
Blocks CSS vs Simple Custom CSS and JS: common questions
Is Blocks CSS better than Simple Custom CSS and JS?
Simple Custom CSS and JS leads on 4 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. Simple Custom CSS and JS ranks higher on WordPress.org: #1 against #5 in Custom CSS Plugins.
Which has more users, Blocks CSS or Simple Custom CSS and JS?
Simple Custom CSS and JS ranks higher on WordPress.org: #1 against #5 in Custom CSS Plugins.
Which is rated higher, Blocks CSS or Simple Custom CSS and JS?
Simple Custom CSS and JS has more users: 600,000+ active installs against 5,000+.
Are Blocks CSS and Simple Custom CSS and JS free?
Both are free to install from WordPress.org. Blocks CSS may also sell a paid version or add-ons. Simple Custom CSS and JS may also sell a paid version or add-ons.
Alternatives to Blocks CSS and Simple Custom CSS and JS
Plugins that score close to both in the same WordPress.org rankings and tags.
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What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.