This online tool lets you see a JSON file more easily and helps you understand its data structure. Below is a screen capture of the input JSON schema viewed by the Online JSON Viewer. You can see, for example, that there is a "bodybuilder" object in the file, and it has some properties representing the simulated body, such as "age," "body_fat," and "sex."
Screencapture of input JSON file viewd by Online JSON Viewer