what does json.parse do

JavaScript
var jsonPerson = '{"first_name":"billy", "age":23}';
var personObject = JSON.parse(jsonPerson); //parse json string into JS objectThe JSON.parse() method parses a JSON string, constructing the JavaScript value or object described by the string. An optional reviver function can be provided to perform a transformation on the resulting object before it is returned.

Json Path
and
Deserialization of Json
using POJO classes.
Source

Also in JavaScript: