Hackolade is a visual editor for JSON Schema for non-programmers.  It is ideal to perform the upfront schema design of any type of JSON document

Hackolade was specially adapted to support the data modeling of JSON files.

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate.  It is based on a subset of the JavaScript Programming Language.  JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages.  These properties make JSON an ideal data-interchange language.  JSON is built on two structures:

• A collection of name/value pairs. In various languages, this is realized as an object, record, struct, dictionary, hash table, keyed list, or associative array.
• An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.

For more information on JSON Schema draft v4, please consult the website.