Simple Custom CSS and JS

Item: Simple Custom CSS and JS
Rating: 4.7
Author: Fast WordPress

by SilkyPress

Adds custom CSS and JavaScript through the admin with syntax highlighting and revisions.

4.4103 WordPress.org reviewsCode snippetsFreemium

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What Simple Custom CSS and JS does

Adds custom CSS and JavaScript through the admin with syntax highlighting and revisions.

It sits in the code snippets part of a WordPress stack and is sold by SilkyPress on a freemium basis. We recommend it in our code snippets guides because it does that one job well without asking you to rebuild the rest of the site around it.

Every plugin adds work to a page request, so treat this as a decision with a cost. Record a speed test before you install it and run the same test afterwards, on the same page, so you know exactly what it charged you.

Real user ratings

Score

4.4/5

Reviews

103

Active installs

600,000+

Downloads

10.9M

Latest version

3.54

Last updated

2026-08-20

These figures come straight from the public WordPress.org plugin directory API for version 3.54, not from us. Check them yourself on the WordPress.org listing. Our own editorial score is 4.7/5.

Where Simple Custom CSS and JS ranks elsewhere

Simple Custom CSS and JS does not appear in the published "best of" lists we track from WPBeginner, TechRadar, Kinsta, Themeisle and similar sites. That is not a mark against it - those roundups are short and skew towards the biggest names.

What changed in the latest version

v3.54Latest release

08/20/2026
Compatibility with WP 7.1 (solved bug https://wordpress.org/support/topic/bug-fix-for-wordpress-7-1-html-snippets-returning-empty-in-__call/ )
Change: update the minimum WP requirement to 4.2

v3.53

05/20/2026
Fix: the "list_table_primary_column" filter should affect only the Custom Code table

v3.52

03/06/2026
Fix: don't load block_css.css or block_js.js on the frontend
Add option "Remove comment from externally linked custom codes"

Release notes are the developer's own words, published on WordPress.org. Read the full changelog

Pros and cons

CSS and JS with version history
A free tier you can trial before paying
Actively maintained and used on production sites we test

No PHP support
The features most sites need sit in the paid tier

How to use it

1Add one snippet at a time and give it a clear descriptive title.
2Set the placement and any conditional rules before activating.
3Activate on staging first if the snippet touches checkout or login.
4Use the error protection feature so a bad snippet cannot lock you out.
5Export your snippets so they can be restored on another site.

How it compares

Other code snippets plugins we recommend, with their rating and pricing model.

Plugin	Our rating	WordPress.org	Pricing	Best for
Simple Custom CSS and JS	4.7	4.4 (103)	Freemium	CSS and JS with version history
Advanced Scripts	4.6	n/a	Premium	Precise placement conditions
Code Snippets	4.8	4.7 (509)	Freemium	Simple, proven and free
Header Footer Code Manager	4.6	4.9 (309)	Freemium	Made for tracking tags
Insert Headers and Footers	4.8	4.9 (1,880)	Freemium	Fastest way to add a tracking tag
WPCode	4.9	4.9 (1,880)	Freemium	Error protection stops white screens

Guides that cover Simple Custom CSS and JS

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7 Best WordPress Code Snippet Plugins for Safer Custom Code in 2026

A snippet plugin keeps small customisations out of your theme, but executable code still carries risk. Review, scope, backups and a fast off switch matter more than the interface.

Updated 10 September 2026

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