JSON.stringify()

The JSON.stringify() method converts a JavaScript object or value to a JSON string. This is useful for sending data over a network, storing data in text format, or logging.

const obj = { name: "John", age: 30, city: "New York" };
const jsonString = JSON.stringify(obj);

console.log(jsonString); // Output: {"name":"John","age":30,"city":"New York"}

JSON.parse()

The JSON.parse() method parses a JSON string and constructs the JavaScript value or object described by the string. This is useful for converting JSON data received from a web server into JavaScript objects.

const jsonString = '{"name":"John","age":30,"city":"New York"}';
const obj = JSON.parse(jsonString);

console.log(obj.name); // Output: John
console.log(obj.age);  // Output: 30
console.log(obj.city); // Output: New York