Is JSON object or array?
JSON Syntax JSON defines only two data structures: objects and arrays. An object is a set of name-value pairs, and an array is a list of values.
Can JSON just be a list?
JSON is built on two structures: An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.
What extension is used to save a JSON file?
JSON filenames use the extension . json .