Simple CSS Plugin
Add CSS to your website through an admin editor, the Customizer or a metabox for page/post specific CSS.
Need to add some custom CSS to your site? Simple CSS gives you an awesome admin editor and a live preview editor in the Customizer so you can easily add your CSS.
Want your CSS to only apply on a specific page or post? Simple CSS adds a metabox which allows you to do just that.
Check out GeneratePress, our awesome WordPress theme! (https://wordpress.org/themes/generatepress)
Features include:
- Full featured admin CSS editor
- Dark and light editor themes
- CSS editor in the Customizer so you can live preview your changes
- Metabox for page/post specific CSS
Installation
There’s two ways to install Simple CSS.
- Go to “Plugins > Add New” in your Dashboard and search for: Simple CSS
- Download the .zip from WordPress.org, and upload the folder to the
/wp-content/plugins/
directory via FTP.
In most cases, #1 will work fine and is way easier.
Screenshots
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The dark theme of the CSS editor.

The light theme of the CSS editor.

The CSS editor in the Customizer.

The CSS editor metabox.
FAQ
How do I add CSS using your plugin? - Make sure Simple CSS is activated.
- Navigate to “Appearance > Simple CSS” and add your CSS to the editor.
How do I add CSS using the Customizer? - Make sure Simple CSS is activated.
- Navigation to “Appearance > Customize” and open the “Simple CSS” section.
How do I change the editor color? - In “Appearance > Simple CSS”, change the “Dark” option below the “Save CSS” button to “Light”.
How do I add CSS that applies only to one page? - Navigate to your page or post in the Dashboard and look for the “Simple CSS” metabox.
Changelog
1.1.1
- Fix PHP notice when Simple CSS hasn’t been saved yet
1.1
- Fix meta box saving issue
1.0
- Show metabox only on public post types
- Add live preview to Customizer
- Code cleanup
- Better sanitizing/validation
0.4
- Use browser search instead of CodeMirror dialog search
- Don’t show GeneratePress metabox if it’s already activated
- Make CSS box full height
0.3
- Add CSS metabox to add CSS on specific pages and posts
- Adjust styling of dark theme
- Add tips to Simple CSS screen
0.2
- Remove extra whitespace from CSS output
- Remove spellcheck from Customizer input
- Allow > characters in the CSS
- Add find (ctrl + f) functionality
0.1