JSON Schema Builder Program

Question

Is there an existing program that helps forming a JSON Schema?

Answer 1

There's this great tool to get you started on generating a JSON Schema: http://www.jsonschema.net/ . Just feed a sample JSON files and out comes out a JSON Schema that you can then tweak.

Answer 2

Check this demo one. It is at an early stage but you can already edit jSON documents with a schema constraint as well as design a Schema itself.

And here is an official thread about Schema-based JSON editor: