There are several highly-rated options available in the Chrome Web Store: JSON Viewer - Chrome Web Store

Color-coding different data types (strings, numbers, booleans) for instant recognition.

In-tree searching that highlights specific keys or values. Top Chrome Extensions for JSON

Automatically turning URL strings within the JSON into clickable hyperlinks.

Allowing you to "fold" large objects or arrays to focus on specific data branches.

By default, browsers often display JSON as a single, dense block of text. A viewer extension solves this by providing: