Hi Ken,
Welcome to the community
You can easily convert the JSON output using the Prismic DOM. It’s our JS library for doing exactly that.
Here’s an example of how to use it in pure JS:
var PrismicDOM = require('prismic-dom');
var titleHtml = PrismicDOM.RichText.asHtml(document.data.title, linkResolver)
You can see more examples here, we also have examples in many different frameworks:
https://prismic.io/docs/javascript/templating/rich-text#1_0-output-as-html
Let me know if you have any other questions.
Thanks.