The perfect CSS Editor for WordPress
Whether you’re a CSS guru or a newbie willing to get familiar with CSS the Inspector is the perfect tool for you to provide CSS customizations to your WordPress Themes and Plugins.
Codemirror + CSSLint
Code Rendering Inspector Pro relies on CodeMirror to render CSS code, CodeMirror is the most powerful and solid JS plugin to render code, used widely across the web from CodePen to JSFiddle.
Syntax Check Inspector Pro uses CSSLint to help point out problems with your CSS code. It does basic syntax checking as well as applying a set of rules to the code that look for problematic patterns or signs of inefficiency.