CSS class finder

Upload or download a list of CSS classes and scan the current page for their presence.

CSS Class Finder is a powerful Edge extension for developers, designers, and QA engineers. Effortlessly scan any web page—including all iframes—for the presence of specific CSS classes or design system components. Upload or link a JSON list of class names, and instantly see which are present, how many times they appear, and where they are used. Key Features: Upload or link a JSON file with your target CSS classes or component names. Scan the current page and all iframes for matches. Instantly see a color-coded, accessible table of results, including the number of instances for each class/component. Visually annotate matched elements with high-contrast outlines and badges for easy auditing. Download a sample JSON to get started quickly. Modern, accessible UI with support for 100+ annotation colors. Works with any design system. Perfect for: Design system audits Accessibility and QA reviews Rapid prototyping and debugging Note: To clear annotations, simply refresh the page. Take control of your CSS audits and component usage reviews—install CSS Class Finder today!