Online JSON Viewer

JSON, short for JavaScript Object Notation, is a lightweight computer data interchange format. JSON is a text-based, human-readable format for representing simple data structures and associative arrays (called objects).

Read more: json.org, wikipedia, google

In JSON, they take on the following forms: object, array, value, string and number.

Slow loading speed

Several users reported slow loading speed in Chrome, but I couldn't figure out why. If you have any hints, please get in touch.

I've done some tests and looks like Firefox loading speed is fine, so please try using that until we figure this out. Thx!

Security concerns:

- The JSON code entered by our users is not saved on the server. In fact, the site doesn't even have a database
- Our site uses HTTPS, so all the traffic between the client and our server is encrypted
- Our service has been running since 2010 and is trusted by more than 1,500,000 users every month

Update (October 2025)

Now you can import JSON files using the "Load JSON data"

{
    "firstName": "James",
    "lastName": "Michael",
    "gender": "man",
    "age": 26,
    "address": {
        "streetAddress": "15 3nd Street",
        "city": "California",
        "state": "CL",
        "postalCode": "90007"
    },
    "phoneNumbers": [
        { "type": "home", "number": "115 666-1234" },
        { "type": "fax", "number": "949 666-4567" }
    ]
}

JSON Viewer was created in 2008 as a side project and has become the largest project of it's kind. It allows users to convert JSON strings to a friendly readable format

The application is using Ext JS