Which method is used to convert a JSON string into a JavaScript object?

The method used to convert a JSON string into a JavaScript object is JSON.parse(). This function takes a string formatted as JSON and parses it, transforming it into a corresponding JavaScript object.

For example, if you have a JSON string like '{"name": "Alice", "age": 25}', using JSON.parse() would result in a JavaScript object that can then be accessed using dot notation or bracket notation, allowing you to use the data in your application seamlessly.

This process is vital for working with data that is sent and received in JSON format, particularly with web APIs. It enables developers to manipulate and utilize this data within their JavaScript programs effectively. The other options listed do not serve this purpose: JSON.stringify() is used for converting a JavaScript object into a JSON string, while JSON.convert() and JSON.obj() are not valid methods in the JavaScript JSON object API.