JSON Lite is a subscription-based Firefox extension designed for web developers and IT professionals who need to efficiently handle JSON and JSONP data. This tool enhances the browser's capabilities by providing features such as formatting JSON responses directly in the browser, encoding and decoding text, and offering a user-friendly interface for navigating complex data structures. Users can conveniently format clipboard content and interact with JSON data without needing external tools.

The extension supports collapsible arrays and objects, allowing users to manage large datasets with ease. It includes features for counting items and properties, displaying collection sizes, and handling large files (up to 10MB+) as well as invalid JSON formats. The tool maintains the integrity of the original JSON document when saving and ensures that numeric keys remain unsorted and large numbers are displayed accurately.