JSON means JavaScript Object Notation.
It’s a simple text format for storing and sharing data.

{
  "name": "Eva",
  "age": 27,
  "isStudent": false,
  "skills": ["HTML", "CSS", "JavaScript"],
}

It looks like JavaScript objects, but it is always just a string.
Most APIs use JSON to send information between server and client.
For example, when your app talks to a backend, the backend usually answers with JSON.

Important rules:

• Always use double quotes for keys and strings.

• Supported types: string, number, boolean, null, array, object.

• It is just text that can be parsed back into an object.

// JavaScript object
const user = {
  name: "Eva",
  age: 27,
  skills: ["HTML", "CSS", "JS"]
};

// Convert object to JSON string
const jsonString = JSON.stringify(user);
console.log(jsonString);
// {"name":"Eva","age":27,"skills":["HTML","CSS","JS"]}

// Parse JSON string back to object
const parsedUser = JSON.parse(jsonString);
console.log(parsedUser.name); // Eva

This code shows how to work with JSON in JavaScript. First, we take an object and convert it into a JSON string with JSON.stringify().
Then, we parse the string back into an object with JSON.parse().