How to pretty-print a JSON object with JavaScript

In this article, you'll learn how to use the JSON.stringify() method to pretty-print a JSON object in JavaScript.

The JSON.stringify() method accepts up to three parameters: the JSON object, a replacer, and space. Only the JSON object is required. The remaining two parameters are optional.

To improve the JSON string readability, pass a number as the 3rd argument representing the total white spaces to insert. The white space count must be between 0 and 10:

const obj = {
  name: 'Atta',
  profession: 'Software Engineer',
  country: 'PK',
  skills: ['Java', 'Spring Boot', 'Node.js', 'JavaScript']

// serialize JSON object
const str = JSON.stringify(obj, null, 4)

// print JSON string

The above example will serialize the JSON object to the following string:

    "name": "Atta",
    "profession": "Software Engineer",
    "country": "PK",
    "skills": [
        "Spring Boot",

As you can see above, the serialized JSON string is formatted and more human-readable.

Here is what the output JSON string looks like when you omit the space parameter:

{"name":"Atta","profession":"Software Engineer","country":"PK","skills":["Java","Spring Boot","Node.js","JavaScript"]}

Read this guide to learn more about JSON data parsing and serialization in JavaScript.

✌️ Like this article? Follow me on Twitter and LinkedIn. You can also subscribe to RSS Feed.

You might also like...

Digital Ocean

The simplest cloud platform for developers & teams. Start with a $200 free credit.

Buy me a coffee ☕

If you enjoy reading my articles and want to help me out paying bills, please consider buying me a coffee ($5) or two ($10). I will be highly grateful to you ✌️

Enter the number of coffees below:

✨ Learn to build modern web applications using JavaScript and Spring Boot

I started this blog as a place to share everything I have learned in the last decade. I write about modern JavaScript, Node.js, Spring Boot, core Java, RESTful APIs, and all things web development.

The newsletter is sent every week and includes early access to clear, concise, and easy-to-follow tutorials, and other stuff I think you'd enjoy! No spam ever, unsubscribe at any time.