Live CSS Preview is a WordPress plugin designed to enhance the customization experience for theme editors. It provides a user-friendly interface by adding a textarea to the new Customize page, where users can write and implement CSS code directly. This feature allows for immediate visual feedback, enabling users to see changes in real time as they modify their styles.

The plugin is categorized under personalization and is available for free, making it accessible to a wide range of WordPress users. With Live CSS Preview, developers and designers can experiment with different styles without the need to refresh the page, streamlining the design process and improving workflow efficiency.