What does JSON.stringify do in JavaScript?

JSON.stringify is a method in JavaScript that is used to convert a JavaScript object or value into a JSON string, which is a format that is easily readable by both humans and machines. This transformation is particularly useful when you need to send data over a network or store it in a format that can be easily retrieved later, such as in local storage or when making API requests.

When the method is applied to an object, it serializes the object's properties and values into a string format that adheres to the JSON standard. This process ensures that the data maintains its structure and can be reconstructed back into an object using JSON.parse.

In contrast, other choices do not accurately describe the function of JSON.stringify. For instance, converting JavaScript values into a JavaScript object would refer to the parsing process rather than stringifying, while handling exceptions in JSON objects is not a function of this method at all. This makes the understanding of JSON.stringify as a serializer of JavaScript objects into JSON strings clear and highlights its crucial role in data manipulation and transmission in JavaScript applications.