DevJSON is a free Chrome extension designed to enhance the experience of inspecting JSON API responses in DevTools. It automatically captures and formats JSON responses, providing a dedicated panel for easy browsing and searching. Users can access a collapsible JSON tree with syntax coloring and perform searches across keys and values, making it easier to navigate and analyze API data. With features such as one-click copying of formatted JSON and request/response header inspection, DevJSON streamlines the workflow for developers working with APIs.

In addition to its core functionality, DevJSON includes advanced features like JSON diff for comparing responses, JSONPath queries for filtering data, and a request timing waterfall for detailed performance analysis. The extension prioritizes user privacy, requiring zero permissions and collecting no data. With customizable themes, keyboard navigation, and support for large JSON responses, DevJSON is a comprehensive tool for developers looking to efficiently inspect and manipulate JSON data.