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JSON Formatter

Format, validate, and minify JSON online. Fast, free, and completely private.

JSON Formatter

Format, validate, and minify JSON online. Paste JSON to check for errors, format it with indentation, or minify it for production use.

Input JSON
Paste your raw JSON text here
Output
Formatted or validated result
Paste JSON on the left and click a button to process it.
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How to use JSON Formatter

1

Paste Input

Paste your text, code, data, or values into the editor above.

2

Choose Options

Adjust any formatting, conversion, or processing options for your task.

3

Copy or Download Result

Copy the result or download it when an export option is available.

Key Features

  • Lightning Fast: Results are generated almost instantly using state-of-the-art tech.
  • 100% Free: No hidden costs, no premium tiers, and no subscriptions required.
  • No Registration: Start using the tool immediately without providing an email address.
  • Secure & Private: Files are processed locally or deleted immediately from our secure servers.

Frequently Asked Questions

Is this JSON formatter free?

Yes, you can format, validate, and minify JSON completely for free.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write, and easy for machines to parse and generate.

Can I validate JSON syntax?

Yes, simply paste your JSON, and the tool will instantly validate it. If it's invalid, you'll see a clear error message indicating where the syntax is wrong.

Can I minify JSON?

Yes, selecting the Minify mode removes all unnecessary whitespace, making the JSON payload as small as possible for production use.

Can I format JSON with 2 spaces?

Yes, 2 spaces is the default indentation option.

Can I format JSON with 4 spaces?

Yes, you can select 4 spaces from the indentation dropdown.

Does this tool support JSON arrays?

Yes, you can format both JSON objects ({...}) and JSON arrays ([...]), as well as strings, numbers, booleans, and null.

Why is my JSON invalid?

Common reasons include missing quotes around keys, missing commas between properties, or using single quotes instead of double quotes.

Does JSON allow comments?

JSON does not support comments or trailing commas. Use strict JSON syntax.

Does JSON allow trailing commas?

JSON does not support trailing commas. The last item in an object or array must not have a comma after it.

Are my JSON files stored?

No, does not store your JSON. does not execute your JSON. It only parses it securely using JSON.parse for validation.

Does this work on mobile?

Yes, this tool is fully responsive and works well on mobile devices.