Blocks CSS vs Modular Custom CSS (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 Modular Custom CSS at #9. Blocks CSS 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).
Modular Custom CSS
WordPress core provides custom CSS functionality in the customizer that's specific to the current theme; you can switch themes freely with each t …
Who leads on what
Blocks CSS leads on 4 of the 5 measures we track.
Blocks CSS ranks higher on WordPress.org: #5 against #9 in Custom CSS Plugins.
Blocks CSS has more users: 5,000+ active installs against 400+.
Not enough reviews to compare ratings fairly: Blocks CSS has 25, Modular Custom CSS has 6. We compare ratings only above 50 reviews each.
Blocks CSS has more reviews behind its score: 25 against 6.
Blocks CSS was updated more recently, on August 12, 2026; Modular Custom CSS on July 19, 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
Pick Blocks CSS 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.
Modular Custom CSS
Modular Custom 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.
Blocks CSS vs Modular Custom CSS side by side
| Blocks CSS | Modular Custom CSS | |
|---|---|---|
| Custom CSS Plugins ranking | #5 | #9 |
| Rating | 4.9 | 5.0 |
| Reviews | 25 | 6 |
| Active installs | 5,000+ | 400+ |
| Total downloads | 219,184 | 18,899 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 12, 2026 | Jul 19, 2026 |
| First published | Feb 14, 2019 | Aug 7, 2014 |
| Tested up to WordPress | 7.0.4 | 7.0.4 |
| Requires PHP | 5.4 | – |
| 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
Modular Custom CSS 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 Modular Custom CSS can pay to appear here: the pair exists only because both plugins reached the Custom CSS Plugins top 10. Full methodology.
Blocks CSS vs Modular Custom CSS: common questions
Is Blocks CSS better than Modular Custom CSS?
Blocks CSS leads on 4 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. Blocks CSS ranks higher on WordPress.org: #5 against #9 in Custom CSS Plugins.
Which has more users, Blocks CSS or Modular Custom CSS?
Blocks CSS ranks higher on WordPress.org: #5 against #9 in Custom CSS Plugins.
Which is rated higher, Blocks CSS or Modular Custom CSS?
Blocks CSS has more users: 5,000+ active installs against 400+.
Are Blocks CSS and Modular Custom CSS free?
Both are free to install from WordPress.org. Blocks CSS may also sell a paid version or add-ons. Modular Custom CSS may also sell a paid version or add-ons.
Alternatives to Blocks CSS and Modular Custom CSS
Plugins that score close to both in the same WordPress.org rankings and tags.
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Custom CSS for Elementor
5,000+ installs · 4.0 from 9 reviews
-
FluentSnippets
50,000+ installs · 4.7 from 77 reviews
-
Post/Page Specific Custom Code
6,000+ installs · 4.6 from 42 reviews
-
Custom CSS Pro
7,000+ installs · 5.0 from 15 reviews
-
Simple Custom CSS and JS
600,000+ installs · 4.4 from 103 reviews
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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.