JavaScript JSON.stringify() method

The JavaScript JSON.stringify() method converts a JavaScript value to a JSON string. It replaces values if a replacer function is specified or includes only the specified properties if a replacer array is specified.

Syntax

Parameters

value: The value to convert to a JSON string.

Replacer: A function that alters the behavior of the stringification process. It is optional.

space: A String or Number object that's used to insert white space into the output JSON string for readability purposes. It is optional.

Return value

A JSON string representing the given value.

Browser Support

Chrome	Yes
Safari	4
Firefox	3.5
Opera	10.5

JavaScript JSON.stringify() method Examples

Example 1

Let's see an example to convert an object of string to JSON string.

<script>
//JavaScript to illustrate JSON.stringify() method.
var json = { firstName:"ASHU", lastName:"BHATI", studentCode:7 };
var student = JSON.stringify(json);
// expected output: {"firstName":"ASHU","lastName":"BHATI","studentCode":7}
document.write(student); 
</script>

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Output:

{"firstName":"ASHU","lastName":"BHATI","studentCode":7}

Example 2

Let's see an example to convert an array object to JSON string.

<script>
//JavaScript to illustrate JSON.stringify() method.
var a = [ "JAVA", "C", "C++", "Python" ];
var Json = JSON.stringify(a);
// expected output: ["JAVA","C","C++","Python"]
document.write(Json);
</script>

Test it Now

Output: