JSX Tool is a browser-based IDE designed for developers working with React. It allows users to write and edit React code directly in the developer panel, offering a streamlined way to find and tweak JSX files. Unlike React DevTools, which focuses on state and tree inspection, JSX Tool integrates styling capabilities, making it easier to adjust CSS without switching between the inspector and the IDE. The tool enables real-time modifications on live pages. Developers can instantly preview CSS changes in the context of the current DOM, and once satisfied, they can save these changes back to their file system. This immediate feedback loop enhances workflow efficiency, eliminating the need for constant back-and-forth between different tools. JSX Tool also facilitates AI interaction by providing context for style changes. Developers can communicate specific adjustments to language models, ensuring clarity about which lines of code are being referenced. The setup process is straightforward, requiring just a terminal command to get started. The underlying Dev Server is open source and designed to be flexible, allowing it to work with various frameworks beyond React.