JSON Viewer Pro is a versatile add-on designed for Chrome, enabling users to view and format JSON data effortlessly. This tool features a collapsible tree view and syntax highlighting, making it easy to navigate through complex JSON structures. Users can paste or drag and drop JSON files, and the viewer automatically detects URLs, rendering them as clickable links. The Pro version unlocks additional features such as JSONPath queries, compression, and conversions to CSV/YAML formats, enhancing its functionality for advanced users.

The viewer is optimized for handling large files, utilizing recursive lazy rendering to ensure performance even with over 5000 nodes, which are displayed in a paginated format. It also includes error localization, highlighting syntax errors with line and column numbers, and offers a statistics panel that displays key metrics about the JSON data. Other features include keyword search, basic formatting options, automatic dark mode, and keyboard shortcuts for quick access.