Question 1

Is the JSON Formatter free to use?

Accepted Answer

Yes, completely free with no sign-up required.

Question 2

What does the JSON Formatter do?

Accepted Answer

It formats (prettifies) minified JSON with readable indentation, minifies formatted JSON for production use, and validates whether a JSON string is syntactically correct.

Question 3

Can I validate JSON with this tool?

Accepted Answer

Yes. Click the Validate button to check your JSON. If it is invalid, you will see an exact error message showing what went wrong and where.

Question 4

Is my JSON data sent to a server?

Accepted Answer

No. All formatting and validation runs entirely in your browser using JavaScript. Your data never leaves your device.

Question 5

Can I sort JSON keys alphabetically?

Accepted Answer

Yes. Enable the 'Sort keys alphabetically' option before clicking Format to recursively sort all object keys A–Z.

Question 6

What are the indent options?

Accepted Answer

You can choose between 2 spaces (default), 4 spaces, or tab indentation to match your project's style guide.

JSON Formatter / Validator

Free Online JSON Formatter & Validator

How to Use This Tool

Features & Options

Common Use Cases

Tips & Best Practices

Frequently Asked Questions