JSON Serialization

Serialization (also known as stringification) is the opposite of parsing. It's how an application prepares its internal data to be sent over a network (e.g., to an API) or saved to a text file.

In JavaScript, you use JSON.stringify() to convert a JavaScript object or array into a JSON string. In Python, this is done with json.dumps().

JavaScript Example

const userObject = {
  name: "Bob",
  isLoggedIn: true,
  lastLogin: "2025-07-28"
};

const jsonString = JSON.stringify(userObject);

console.log(jsonString);
// Output: '{"name":"Bob","isLoggedIn":true,"lastLogin":"2025-07-28"}'