Simple Custom CSS and JS

Description

Customize your WordPress site’s appearance by easily adding custom CSS and JS code without even having to modify your theme or plugin files. This is perfect for adding custom CSS tweaks to your site.

Features

  • Text editor with syntax highlighting
  • Print the code inline or included into an external file
  • Print the code in the header or the footer
  • Add CSS or JS to the frontend or the admin side
  • Add as many codes as you want
  • Keep your changes also when you change the theme

Screenshots

  • Manage Custom Codes

  • Add/Edit Javascript

  • Add/Edit CSS

  • Add/Edit HTML

Installation

  • From the WP admin panel, click Plugins” -> Add new”.
  • In the browser input box, type Simple Custom CSS and JS”.
  • Select the Simple Custom CSS and JS” plugin and click Install”.
  • Activate the plugin.

OR…

  • Download the plugin from this page.
  • Save the .zip file to a location on your computer.
  • Open the WP admin panel, and click Plugins” -> Add new”.
  • Click upload”.. then browse to the .zip file downloaded from this page.
  • Click Install”.. and then Activate plugin”.

OR…

  • Download the plugin from this page.
  • Extract the .zip file to a location on your computer.
  • Use either FTP or your hosts cPanel to gain access to your website file directories.
  • Browse to the wp-content/plugins directory.
  • Upload the extracted custom-css-js folder to this directory location.
  • Open the WP admin panel.. click the Plugins” page.. and click Activate” under the newly added Simple Custom CSS and JS” plugin.

FAQ

What if I want to add multiple external CSS codes?

If you write multiple codes of the same type (for example: two external CSS codes), then all of them will be printed one after another

Will this plugin affect the loading time?

When you click the Save button the codes will be cached in files, so there are no tedious database queries.

Does the plugin modify the code I write in the editor?

No, the code is printed exactly as in the editor. It is not modified/checked/validated in any way. You take the full responsability for what is written in there.

My code doesn’t show on the website

Try one of the following:
1. If you are using any caching plugin (like W3 Total Cache” or WP Fastest Cache”), then don’t forget to delete the cache before seing the code printed on the website.
2. Make sure the code is in Published state (not Draft or in Trash).
3. Check if the wp-content/uploads/custom-css-js folder exists and is writable

Does it work with a Multisite Network?

Yes.

What if I change the theme?

The CSS and JS are independent of the theme and they will persist through a theme change. This is particularly useful if you apply CSS and JS for modifying a plugin’s output.

Can I use a CSS preprocesor like LESS or Sass?

For the moment only plain CSS is supported, but you can check out the Pro version in case you need a CSS preprocessor.

Can I upload images for use with my CSS?

Yes. You can upload an image to your Media Library, then refer to it by its direct URL from within the CSS stylesheet. For example:
div#content {
background-image: url(‘http://example.com/wp-content/uploads/2015/12/image.jpg’);
}

Can I use CSS rules like @import and @font-face?

Yes.

Who can publish/edit/delete Custom Codes?

By default only the Administrator will be able to publish/edit/delete Custom Codes. On the plugin activation there is a role created called Web Designer. You can assign this role to a non-admin user in order to allow to publish/edit/delete Custom Codes. On the plugin’s Settings page there is an option to remove this role.

My website has HTTPS urls, but the codes are linked as HTTP

The URL for the linked Codes is built just like the URL for other media (from Media Library) by using the WordPress Address option found on the WP Admin -> Settings -> General page, as shown in this screenshot. If the WordPress Address has HTTPS in the url, then the Custom Codes and all the other media will have HTTPS in the url.

Reviews

Январь 6, 2025
This plugin is basically a must. When using a free theme, I am quite limited in editing the appearance. And some functions cannot be solved using plugins. There are three things that I have been missing for a long time. Insufficient highlighting of the wrong number of brackets. It does turn red when I click on it, but it would be better if it was red permanently or turned red after saving. Basic ability to undo changes. Ability to automatically format code However, this does not change the fact that I give it five stars.
Январь 4, 2025
Simple Custom CSS and JS does exactly what it says on the box. I’ve been using it for many years on non-profit websites, and it has proven rock solid. Here’s what I especially appreciated: CSS, JS, and HTML syntax highlighting. Code can be inline or loaded externally (and thus cached). Code can be loaded in the header, body, or footer. Code can be loaded on the front end, in the block editor and/or admin pages. Code can easily be enabled or disabled with a single click. That is a lot of features for a free plugin, and I’m perfectly content with that. There is a reasonably priced premium version with advanced features like CSS preprocessors and code revisions if these are important features to you, but the free version is a great start and enough for many projects.
Декабрь 9, 2024 2 replies
This plugin does flush all permalinks settings on install, without confirmation of Admin, which impacted the whole permalinks settings, and required me to deactivate and reactivate multiple plugins to get their permalinks settings setup again, which is loss of time and requires a clear confirmation before doing that on install.
Октябрь 9, 2024
Prático, funcional e sem a irritante tentativa de fazer você comprar. Uso perfeitamente sem a necessidade de complementá-lo com algum plugin dependente pago.
Сентябрь 2, 2024
This is a relatively small simple plugin but recently I’ve found it invaluable for adding small CSS and JS snippets to the site. It’s been great for adding things RocketChat and Webpushr snippets tiny css quick fix adjustments to cope with UI inconsistencies.
Read all 97 reviews

Contributors & Developers

“Simple Custom CSS and JS” is open source software. The following people have contributed to this plugin.

Contributors

“Simple Custom CSS and JS” has been translated into 17 locales. Thank you to the translators for their contributions.

Translate “Simple Custom CSS and JS” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.

Changelog

3.49

  • 11/13/2024
  • Fix: add nuance for the in Block editor” option for websites with WP before v6.6 and after

3.48

  • 09/24/2024
  • Feature: add JS/CSS custom codes to the Block editor

3.47

  • 05/27/2024
  • Fix: use the GMT time for showing when a custom code was published or modified

3.46

  • 01/31/2024
  • Tweak: update the Bootstrap and jQuery library links
  • Tweak: remove the qTranslate-x warning. The qTranslate-x plugin was removed from wp.org since Aug 2021

3.45

  • 10/17/2023
  • Fix: enqueue the jQuery library only if there is a frontend JS custom code that requires it

3.44

  • 06/07/2023
  • Compatibility with the WooCommerce custom order tables” feature

3.43

  • 03/13/2023
  • Fix: PHP8.1 deprecation notices
  • Fix: after adding a JS/HTML custom code with empty content will show the CSS default message in the editor

3.42

  • 01/17/2023
  • Fix: the LH Archived Post Status” plugin was removing the Publish” button on the add/edit custom code page
  • Feature: multiple values for the Where in site” option

See changelog for all versions.