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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Another useful tool for working with JSON interactively is ijq: https://github.com/gpanders/ijq
Maybe hijacking the thread, but if you prefer to stay in the browser give also a try to Virtual Json Viewer extension [1][2]. I developed it to navigate large json files at work and it also integrates JQ.
unrelated: this is my very first comment on HN, hurray!
[1] Chrome Web Store: https://chrome.google.com/webstore/detail/virtual-json-viewe...
[2] Github: https://github.com/paolosimone/virtual-json-viewer
= note: see issue #54883 for more information
If you should feel inclined, you may want ot look at jsonui[1] Even if it is rather crude, I always come back to if for these two features
[1] https://github.com/gulyasm/jsonui