Blocks CSS: CSS Editor for Gutenberg Blocks
Blocks CSS allows you add custom CSS to your Blocks straight from the Block Editor (Gutenberg).
Maintenance 65/10056d since update
Active installs
5,000
Downloads
181,873
Reviews
25
Age
6.9y
Tagsblockgutenbergcsscss editorblocks css
Plugin info
Total downloads: 181,873
Active installs: 5,000
Total reviews: 25
Average rating: 4.9
Support threads opened: 0
Support threads resolved: 0 (0%)
Available in: 9 language(s)
Contributors: 4
Last updated: 11/5/2025 (56 days ago)
Added to WordPress: 2/14/2019 (6 years old)
Minimum WordPress version: 6.2
Tested up to WordPress version: 6.8.3
Minimum PHP version: 5.4
Maintenance & Compatibility
Maintenance score
Actively maintained • Last updated 56 days ago • 25 reviews
65/100
Is Blocks CSS: CSS Editor for Gutenberg Blocks abandoned?
Likely maintained (last update 56 days ago).
Compatibility
Requires WordPress: 6.2
Tested up to: 6.8.3
Requires PHP: 5.4
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Description
Blocks CSS allows you add custom CSS to your Blocks straight from the Block Editor (Gutenberg).
It adds a syntax-highlighted CSS Editor where you can add additional CSS to your Gutenberg Blocks to style them the way you want.
All the code and sources for this plugin are publicly available as part of https://github.com/Codeinwp/otter-blocks.
Installation
No installation instructions available
Frequently Asked Questions
No FAQ available
Review feed
Meera
Excellent!
This is must have plugin for Gutenberg Block Editor. Makes it so much easier to add css classes where you use the blocks!
wladston
This plugin saved my life!
I think I just would not be able to use the block editor without this. Thank you so much for this plugin!
Ronald Huereca
This is a great tool for those wanting to use core blocks
This is a great tool for what it does. The only confusing thing for me is that it says on .org that you have 11 blocks. I couldn't spot any new ones after installing this plugin, nor found any settings.
Masud Rana
Completes Block Editor
Can't think of Block Editor without this. Tiny powerful thing.
Only thing I hate in this plugin is the following line:
$render_css = empty( $file_name ) || strpos( $file_name, 'post-v2' ) === false;
This means if you deactivate Otter, your content might just break :(
Andreslav
Simple and great plugin!
Does exactly what I need it to do.
Screenshots
CSS Editor
CSS Editor
Changelog
You can check the changelog here.