Multisite Custom CSS

Description

WordPress core provides custom CSS functionality in the customizer that’s specific to the current theme; you can switch themes freely with each theme’s additional CSS remaining in place. This is particularly useful on multisite networks, where it’s often impractical to use child themes to save customizations for each site. Unfortunately, custom CSS is not visible to site admins on multisite networks by default because they are not trusted with unfiltered CSS.

This plugin gives site admins access to the core custom CSS feature by mapping the edit_css capability to edit_theme_options, thereby trusting site admins with unfiltered CSS.

Installation

Take the easy route and install through the WordPress plugin installer, OR,
Download the .zip file and upload the unzipped folder to the /wp-content/plugins/ directory
Network Activate the plugin through the ‘Plugins’ menu in the network admin
(Non-super) Admins can now manage their own CSS for the customizer for their site

Faq

Why is the plugin necessary?

Core can’t guarantee that CSS is properly sanitized when saving it in the database, and the associated capabilities for managing CSS are equivalent to those for posting unfiltered html. Site admins do not have this capability, so they can’t manage CSS as a result. However, in most cases this is an acceptable tradeoff for providing custom CSS to site admins, particularly on trusted networks (open networks are encouraged to take greater precautions and consider other solutions besides this plugin). Note that super admins can access custom CSS for any site on the network without this plugin.

Because this plugin only provides access to a core feature for more users, all feature requests and non-capability-related support questions apply to WordPress core and not this plugin.

Reviews

Simple & Effective

By Kevin (kwickham) on January 15, 2025

Title says it all

Works, network-wide or site-by-site

By Bigue Nique (biguenique) on July 14, 2021

Works perfectly, allows admin to tweak their site's CSS. I found that this plugin doesn't need to be activated network-wide: you can let admins decide to activate it whether they need it. The custom CSS rules will stay even when the plugin is deactivated. They can always be edited by a network superuser.

Great

By mae234 on April 8, 2021

It solved the problem.

Works great, easy to install

By hallcp on March 13, 2019

Very useful. I support a great many sites and several of the individual site admins were keen to tweak the CSS. This is a great solution!

Nice!!!

By lenasterg on October 4, 2018

Thanks for the useful plugin.

Perfect

By samsk on February 8, 2018

Saved my life.

Just as much code as it needs 🙂

By Bernhard Kau (Kau-Boy) on October 25, 2017

Just does what you expect it to do.

Allows my Site Admins to use the Core CSS functionality

By sylviabass on April 27, 2017

This works very well to allow my site admins the ability to use the built in CSS editor. We were using a separate plugin for this which has been deprecated. Thank you so much for this great plugin.

Changelog

1.0

First publicly available version of the plugin.
Requires WordPress 4.7+.