JSON.stringify()

A common use of JSON is to exchange data to/from a web server. When sending data to a web server, the data has to be a string. Convert a JavaScript object into a string with JSON.stringify().

Imagine we have this object in JavaScript:

var obj = { name: "John", age: 30, city: "New York" };

Use the JavaScript function JSON.stringify() to convert it into a string.

var myJSON = JSON.stringify(obj);

The result will be a string following the JSON notation.

myJSON is now a string, and ready to be sent to a server:

Example

var obj = { name: "John", age: 30, city: "New York" };
var myJSON = JSON.stringify(obj);
document.getElementById("demo").innerHTML = myJSON;