JSON Navigator is a Chrome extension developed by r55man, offering a fast and flexible JSON viewing experience. The program stands out for its exceptional speed, supporting file sizes over 100MB. It features an on-screen control panel with tooltips for easy navigation and configurable auto-expand and expand depth options.

Additionally, JSON Navigator includes a collapse-all-children feature, displays array sizes and object item counts, and showcases byte counts to provide insights into data hierarchies. Users can benefit from key sorting, array indexing, and color-coded depth guides. The extension offers a clutter-free display, supports one-click copy-to-clipboard functionality, and allows for easy switching between markup and raw view.