JSON Formatter and Validator

How to use the JSON formatter#

Paste JSON on the left and choose an action:

• Format makes it readable with 2 spaces, 4 spaces or tabs.
• Minify removes all spaces, for the smallest possible size.
• Sort keys orders every object’s keys alphabetically, which makes two JSON files easy to compare.
• Validate checks the syntax and tells you the line and column of the first error.

Everything happens in your browser, so it’s safe to paste private API responses.

The most common JSON mistakes#

Mistake	Wrong	Right
Single quotes	{'name': 'Asha'}	{"name": "Asha"}
Trailing comma	[1, 2, 3,]	[1, 2, 3]
Unquoted keys	{name: "Asha"}	{"name": "Asha"}
Comments	{"a": 1 // note}	JSON has no comments
undefined / NaN	{"x": undefined}	use null

JSON in code#

const text = JSON.stringify({ name: "Asha", skills: ["HTML", "CSS"] }, null, 2);
const data = JSON.parse(text);
console.log(data.skills[1]); // CSS

import json
data = json.loads('{"name": "Asha", "age": 21}')
print(json.dumps(data, indent=2, sort_keys=True))

Learn more in the JavaScript and Python tutorials.