The built-in JavaScript object used for working with JSON is JSON.
The JSON object provides the two operations most developers use for data exchange: JSON.parse() converts a JSON text string into a JavaScript value, while JSON.stringify() serializes a JavaScript value into JSON text. Together, they let browser code and servers exchange structured data such as objects and arrays.
JSON stands for JavaScript Object Notation, but JSON itself is language-independent. It was derived from JavaScript syntax and became popular as a lightweight alternative to XML for web applications. Douglas Crockford helped popularize the format, and the JSON.org website launched in 2001. Today, languages including Python, Java, PHP, and Go provide their own JSON tooling.
JSON is not the same thing as an ordinary JavaScript object. JSON text requires double-quoted property names and strings, supports values such as numbers, strings, booleans, arrays, objects, and null, and does not allow comments or trailing commas. Number, String, and Object are general JavaScript constructors or objects, not the dedicated JSON utility.