JSON Viewer is a Chrome add-on developed by Rongjian Zhang. As a port of Firefox's JSON Viewer, this program allows users to easily parse and view JSON files directly in the browser.

When you open a JSON file in Chrome, JSON Viewer automatically parses and highlights the content, making it easy to read and understand. Arrays and objects within the JSON file are initially shown collapsed, but can be expanded with the click of a "+" icon.

This add-on is a helpful tool for developers and anyone working with JSON data. It eliminates the need for external tools or plugins, providing a convenient way to inspect JSON files directly within the browser.

JSON Viewer is available for free on the Chrome Web Store, allowing users to quickly install and start using it without any cost. The source code for this add-on can be found on GitHub for those interested in contributing or reviewing the code.