React Detector Badge is a Chrome extension designed to instantly identify whether a website utilizes React.js, a widely-used JavaScript library for building user interfaces. The tool features a simple interface, displaying a blue icon when React is detected and a gray icon when it is not. Users can easily access version details with a single click, making it a convenient resource for developers, recruiters, and tech enthusiasts alike.

This lightweight add-on operates efficiently without affecting browser performance, utilizing minimal memory and processing resources. It requires no setup, functioning immediately upon installation. The extension prioritizes user privacy with no data collection or tracking, ensuring all detection occurs locally. Regular updates keep it current with the latest React versions, making it an essential tool for anyone interested in web technologies.