WhyCSS Inspector is a Chrome add-on designed for web developers to diagnose CSS issues efficiently. This tool simplifies the troubleshooting process by allowing users to see which CSS rules apply to an element, understand their specificity, and identify overriding properties. With a clean, readable interface, developers can quickly navigate through complex stylesheets without the frustration of traditional DevTools.

Key features include a comprehensive table of applied CSS rules, specificity scores for each rule, and clear indications of overridden properties. The tool also offers interactive highlighting of elements on the live page and built-in diagnostics for common issues. Additionally, with a lightweight design that respects user privacy, WhyCSS Inspector only activates upon user interaction, ensuring a secure debugging experience.