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JSON Formatter

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Paste JSON to format, validate and minify it. Live errors and one-click copy.

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Input
Output
{
  "name": "FreeToolz",
  "tools": 120,
  "premium": true
}

About the JSON Formatter

The JSON Formatter validates, prettifies and minifies JSON in your browser. It highlights syntax errors with the exact line so you can debug malformed API responses quickly.

How to use the JSON Formatter

  1. 1Paste your JSON into the input pane.
  2. 2Choose Pretty (indented) or Minified (compact) output.
  3. 3Copy the result or download it as a .json file.

Why people use it

  • Debug API responses that arrive as one long line.
  • Validate JSON before committing configuration files.
  • Minify JSON for network payloads.
  • Reformat gnarly JSON pasted from logs.

Frequently asked questions

Is my JSON sent anywhere?

No. Everything runs locally — safe for sensitive payloads.

Does it support comments?

Standard JSON doesn't allow comments. Strip them before pasting, or use a JSONC-aware tool.

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