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Best custom CSS plugins for WordPress

The most popular custom CSS plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Simple Custom CSS and JS leads with 600K+ active installs, ahead of Insert Headers And Footers (200K+) and Simple Custom CSS Plugin (100K+). All 67 plugins tagged “custom css” are below, with figures from WordPress.org that update every day.

Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.

Research this niche or see all plugins.

Top 10 custom CSS plugins

  1. 1.
    Simple Custom CSS and JS

    The most installed custom CSS plugin, with 600K+ active installs. Rated 4.4 from 104 reviews, updated 6 days ago.

  2. 2.
    Insert Headers And Footers

    200K+ active installs. Rated 5.0 from 135 reviews, updated 2 weeks ago.

  3. 3.
    Simple Custom CSS Plugin

    100K+ active installs. Rated 4.7 from 159 reviews, last updated 1 year ago. Tested only up to WordPress 6.7.11.

  4. 4.
    Simple CSS

    80K+ active installs. Rated 4.9 from 60 reviews, last updated 1 year ago. Tested only up to WordPress 6.8.12.

  5. 5.
    WP Add Custom CSS

    60K+ active installs. Rated 4.8 from 89 reviews, last updated 1 year ago. Tested only up to WordPress 6.8.12.

  6. 6.
    FluentSnippets

    50K+ active installs. Rated 4.7 from 79 reviews, updated 2 weeks ago.

  7. 7.
    Woody Code Snippets

    50K+ active installs. Rated 4.5 from 221 reviews, updated 2 weeks ago.

  8. 8.
    Custom CSS and JavaScript

    10K+ active installs. Rated 4.7 from 60 reviews, last updated 2 years ago. Tested only up to WordPress 6.6.11.

  9. 9.
    TJ Custom CSS

    8K+ active installs. Rated 5.0 from 6 reviews, last updated 4 years ago. Tested only up to WordPress 6.1.16.

  10. 10.
    CodeKit

    7K+ active installs. Rated 4.8 from 16 reviews, updated 3 weeks ago.

All 67 plugins tagged “custom css”