可以使用`JSON.parse()`方法将JSON字符串转换成JSON对象,示例如下:
```javascript
var jsonString = '{"name":"John", "age":30, "city":"New York"}';
var jsonObject = JSON.parse(jsonString);
console.log(jsonObject);
```
输出结果:
```javascript
{
name: "John",
age: 30,
city: "New York"
}
```