ShadowReference
ShadowReference
Data & JSON

JSON Formatter

Free online tool · runs in your browser

Beautify JSON with instant validation.

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Quick tutorial

  1. 1Paste JSON into the input panel.
  2. 2Click Format to beautify with 2-space indentation.
  3. 3Use Copy or Download to export the result.

Free online json formatter

Use this free online JSON formatter to beautify and pretty-print JSON instantly. Paste messy or minified JSON, click Format, and get readable 2-space indented output with syntax validation. Everything runs locally in your browser, so API payloads, config files, and secrets never leave your device. It is a fast JSON beautifier and pretty printer for developers who need clean JSON without installing an editor plugin.

How to use JSON Formatter

  1. Paste JSON into the input panel.
  2. Click Format to beautify with 2-space indentation.
  3. Use Copy or Download to export the result.

Limitations

  • Very large JSON files may slow down the browser.
  • Comments and trailing commas are not valid JSON.

Example

Input

{"a":1,"b":[2,3]}

Output

{
  "a": 1,
  "b": [2, 3]
}

FAQ

Frequently Asked Questions

What is a JSON formatter?

A JSON formatter (also called a JSON beautifier or pretty printer) takes compact or messy JSON and rewrites it with consistent indentation and line breaks so you can read and debug it.

Is this JSON formatter free?

Yes. This online JSON formatter is free, with no signup, no watermarks, and no file-size account limits beyond what your browser can handle.

Does the JSON beautifier upload my data?

No. Formatting and validation run entirely in your browser. Your JSON is never sent to a server.

Can I pretty-print minified JSON?

Yes. Paste minified JSON and format it to restore readable indentation. Use the JSON Minifier if you need the reverse.

Does this send my JSON to a server?

No. All formatting happens locally in your browser.

Can I minify JSON here?

Use the JSON Minifier tool for compact output.

Is JSON Formatter free to use?

Yes. JSON Formatter on ShadowReference is free, with no account, no watermarks, and no server-side processing.

Does this tool send my data to a server?

No. All processing happens locally in your browser. Your input never leaves your device.

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