What's the difference in using toString() compared to JSON.stringify()?

Question

In both the cases I get in output the content of the object:

alert(JSON.stringify(obj));

or

alert(obj.toString());
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Answer 1

for an object say

obj = { a: 'a', '1': 1 }

obj.toString() gives

"[object Object]"

JSON.stringify(obj) gives

"{"1":1,"a":"a"}"

For .toString(), a default value is returned when the argument type is an object. JSON.stringify on the other hand returns JSON text, which can be converted back into a JSON object by using JSON.parse