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Processed locally in your browser

JSON Formatter

Make sense of your JSON. Format clean code, explore an interactive tree, and catch errors as you type.

{ }
Your JSON, made clear.Format, validate, and explore. Everything stays on your device.
0 characters · 1 line
JSON only · Up to 1 MB Ctrl / ⌘ + Enter to run
Ready when you are
Explore your data
{ }A little structure goes a long way.

Paste JSON to explore objects, arrays, and values.
Or load the example to see how it works.

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What Does a JSON Formatter Do?

A JSON formatter (or "beautifier") takes compact or messy JSON and reformats it with consistent indentation and line breaks, making it far easier to read and debug. This tool also validates the JSON as it formats, so syntax errors are caught immediately.

Example Calculation

{"name":"ToolSprouts","tools":42} formats to a clean, indented structure with each key on its own line.

How to Use This Tool

  1. Paste your JSON into the input box.
  2. Choose an indent size.
  3. Click Format JSON to beautify it, or Minify to compact it onto one line.
  4. Switch between Tree and Code, then copy or download the JSON.

Common Use Cases

Debugging API responses
Cleaning up minified JSON for readability
Preparing JSON for documentation
Quickly spotting syntax errors

Related Tools

JSON ValidatorCheck whether your JSON is valid and see exactly where errors occur. Base64 EncoderEncode text or data into Base64 format.

Frequently Asked Questions

Is my JSON data uploaded anywhere?

No — all formatting and validation happens locally in your browser using JavaScript. Nothing is sent to a server.

What happens if my JSON has a syntax error?

The tool shows a clear error message, including the line and column where the problem was detected.