Simple CSS

71 Quality Score

Active Installs

22/30

With 80,000 active installs, Simple CSS has a modest but solid user base, though it sits far behind category leaders like WPCode at 3 million installs.

Update Freshness

16/25

Updated on 2025-09-15 and tested against WordPress 6.8.5, the plugin is current, though the null PHP requirement and lack of declared minimum leave compatibility details thin.

User Rating

15/15

A 98 out of 100 rating from 60 reviewers is exceptional, indicating the small user base is highly satisfied.

Support Health

8/15

The 0 percent resolution rate on 1 support thread is a real concern, as there is not enough data to confirm the developer actively answers questions.

WP Compatibility

11/15

Tested with WordPress 6.8.5 and requiring only WordPress 4.0, compatibility is broad, but the missing PHP version requirement is a minor transparency gap.

Scores higher than 27% of indexed plugins

About

Add CSS to your website through an admin editor, the Customizer or a metabox for page/post specific CSS.

Active Installs 80k+

Rating ★★★★½ 4.9/5

Last Updated 2025-09-15 3:11pm GMT

Requires WordPress 4.0+

Tested Up To 6.8.8

✓ No known vulnerabilities

What It Does

Simple CSS lets you write custom CSS directly inside the WordPress admin, the Customizer, or a per-page/post metabox, then outputs it site-wide or scoped to individual content. It strips down the experience to just a code editor and the necessary hooks, avoiding the complexity of a full code snippet manager. In practice, you open a settings page, paste CSS, save, and see changes on the front end.

Who It's For

This plugin fits site owners and freelance designers who need to tweak CSS without editing a theme file or maintaining a child theme for minor styling changes. It is well suited for small business sites, portfolios, blogs, and local service pages where a handful of custom rules need to be applied globally or to specific pages. The per-post metabox is especially handy for one-off layout tweaks on landing pages or sales pages.

Who Should Skip It

Anyone who needs to add JavaScript or PHP snippets, manage conditional logic, or insert code in headers and footers should look at a more capable tool like WPCode or Code Snippets. Developers already comfortable editing a child theme or theme stylesheet do not need this plugin at all.

The Bottom Line

Simple CSS delivers exactly what its name promises: a focused, lightweight way to add custom CSS without theme file edits, and its near-perfect user rating reflects that simplicity. The trade-offs are a smaller install base, near-zero visible support activity, and zero ability to handle JavaScript or PHP. If your needs are strictly CSS and you want minimal overhead, it is a solid pick; otherwise, WPCode is the safer all-rounder.

Related Plugins

WPCode 98/100

Pick WPCode if you need to insert CSS, JavaScript, or PHP snippets with conditional logic across headers, footers, and pages.

Code Snippets 88/100

Choose Code Snippets if your customizations go beyond CSS into PHP functions and you want safe, snippet-managed execution.

Insert Headers And Footers 87/100

Choose Insert Headers And Footers if your only goal is a quick place to drop header or footer scripts without a full editor.

Simple Custom CSS and JS 87/100

Pick Simple Custom CSS and JS if you also need to add custom JavaScript alongside CSS through a similar lightweight interface.

Blocks Animation 84/100

Choose Blocks Animation specifically for adding CSS-driven animations to Gutenberg blocks rather than general styling.