JSON Formatter

Format JSON instantly with our free JSON formatter and JSON formatter online tool. Easily format JSON and use our JSON beautifier, JSON beautifier online, and JSON pretty print features to make JSON easier to read. The tool works as a JSON pretty printer, pretty print JSON, JSON viewer, and JSON viewer online for developers working with structured data. You can also use it as a JSON parser online or JSON format checking utility. Wondering how do I format JSON, how do I beautify JSON, or how can I format JSON online? Paste your JSON and instantly transform messy data into readable, properly formatted JSON.

How to use the JSON Formatter

  1. Paste JSON into the input box.
  2. Choose 2 spaces, 4 spaces, tab or Minify.
  3. Copy or download the formatted result.

JSON Formatter features and limits

How the JSON Formatter works

Your text is parsed with the browser’s built-in JSON parser and written back out with the chosen indentation. Nothing is sent anywhere.

Privacy and browser processing

Your input is processed locally in this page and is not uploaded or stored by Best Web Tools. Your hosting provider may still keep ordinary server logs for page requests.

Frequently asked questions

Why does my JSON fail?

Common causes are single quotes, trailing commas, unquoted keys and comments. None are valid JSON.

Does formatting change my data?

Values are preserved, but very large numbers beyond JavaScript’s precision may be rounded.

How do I beautify JSON?

Paste your JSON, choose an indentation option and read the formatted result. Use Copy or Download to keep it.

How do I make minified JSON readable?

Format it with 2 or 4 spaces. If it fails, fix the error message shown, which usually points to a stray comma or quote.

Can it validate JSON?

Yes. Invalid JSON shows the parser’s error message. The JSON Validator gives a simple valid or invalid answer.

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Why use the JSON Formatter?

Developers meet minified API responses and config files that are hard to read. Formatting reveals the structure so you can spot a missing field or a nesting mistake. Minifying does the reverse and is handy before embedding JSON in a script or request body.