<p>The Advanced WordPress Theme Editor plugin will allow you to edit your theme directly in your blog admin section but with a better experience since it will format and highlight your source code with nice colours.</p>
<p>The plugin is compatible with WP 2.8 and less and is based on the Edit Area script that supports at least PHP, CSS, JS and many more file types.</p>


Advanced WordPress Theme Editor

This plugin will improve your experience when editing yout wp themes since it will format and highlight your source code with nice colours.

Greg - SiteOrigin

alexgso

<p>SiteOrigin CSS is the intuitive and powerful CSS editor designed to empower your WordPress site customization. Enjoy a seamless editing experience with real-time visual controls, making it easy to tweak your site’s look and feel instantly. Whether you’re a beginner or an advanced developer, SiteOrigin CSS has you covered.</p>
<p>For beginners, our user-friendly visual controls and live previews eliminate the guesswork from CSS editing. See your changes as you make them, ensuring your site looks exactly as you envision. For advanced users, we offer robust code autocompletion, speeding up your workflow and making CSS writing faster and more efficient than ever before. Take full control of your site’s design with SiteOrigin CSS and bring your creative vision to life.</p>
<div class="embed-vimeo" style="text-align: center;"><iframe loading="lazy" src="https://player.vimeo.com/video/129660380" width="750" height="422" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe></div>
<h4>Inspector</h4>
<p>The hardest part of editing your site’s design using CSS is usually finding the correct selector to use. The powerful inspector that comes with SiteOrigin CSS makes this easy. While viewing a full preview of your site, just click on an element, and it’ll help you identify the best selector to use to target that element.</p>
<p>The inspector will help you even if you have no idea what a CSS selector is.</p>
<h4>Visual Editor</h4>
<p>Don’t like playing around with code? No problem. SiteOrigin CSS has a set of simple controls that make it easy to choose colors, styles, and measurements. Combined with the inspector, you’ll be able to make changes in just a few clicks.</p>
<h4>CSS Editor</h4>
<p>SiteOrigin CSS has a powerful CSS editor, the likes of which you’d usually only expect from high-end IDEs. It has autocompletion for both CSS selectors and attributes. It also features very useful CSS linting to help you identify issues in your code before you publish your changes.</p>
<h4>It’s Free</h4>
<p>We’re committed to keeping SiteOrigin CSS free. You can install it on as many sites as you like without ever worrying about licensing. All future updates and upgrades will be free, and we even offer free support over on our friendly support forums.</p>
<h4>Works With Any Theme</h4>
<p>There’s an ever-growing collection of awesome WordPress themes, and now with SiteOrigin CSS, you can edit every single one of them to your heart’s content. No matter what theme you’re using, SiteOrigin CSS will work perfectly.</p>
<h4>Actively Developed</h4>
<p>We’re actively developing SiteOrigin CSS. Keep track of what’s happening over on <a href="https://github.com/siteorigin/so-css/" rel="nofollow ugc">GitHub</a>.</p>
<h3>Documentation</h3>
<p><a href="https://siteorigin.com/css/getting-started/" rel="nofollow ugc">Documentation</a> is available on SiteOrigin.</p>
<h3>Support</h3>
<p>Free support is available on the <a href="https://siteorigin.com/thread/" rel="nofollow ugc">SiteOrigin support forums</a>.</p>
<h3>SiteOrigin Premium</h3>
<p><a href="https://siteorigin.com/downloads/premium/" rel="nofollow ugc">SiteOrigin Premium</a> enhances SiteOrigin CSS with a Google Web Font Selector. Choose from hundreds of beautiful web fonts right in the visual editor.</p>
<p>SiteOrigin Premium includes access to our professional email support service, perfect for those times when you need fast and effective technical support. We’re standing by to assist you in any way we can.</p>


SiteOrigin CSS


This is one of the best CSS plugins out there. It's WAY better for custom CSS than the built in WP way. 



While writing this review, I made two feature requests which would bump it up to five stars. 



One thing I'm personally missing is a sort of CSS guide. As in, links to the W3C page of that properity for people to read up upon.


Amazing stuff

Powerful, simple CSS editing for WordPress. Visual controls & real-time previews for effortless site customization.

Advanced WordPress Theme Editor vs SiteOrigin CSS