Visual JSON for Mac
Working with Visual JSON is extremely intuitive due to its simple, straightforward user interface: in the top area of the main window you can input the resource address or paste the JSON data in the “Content field, while on the bottom you can view the data in tree or text format.
Visual JSON also enables you to decide which function you want to use: GET, POST, PUT or DELETE. In addition, in the “Details” panel, you can view the content of the field value or raw text areas, or the included headers.
Last but not least, via the Visual JSON Preferences window you can choose to see a brief of Array / Dictionary fields in the tree view and allow the usage of self-signed or invalid SSL certificates.
To conclude, if you are looking for a JSON visualizer that provides basic capabilities, Visual JSON might be exactly what you are looking for.