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JSON Formatter & Validator

A JSON formatter beautifies messy JSON into clean, indented, readable text and validates that it's correct. It can also minify JSON to a single line. If your JSON is invalid, it tells you what and where the problem is — all processed locally in your browser.

How to Use the JSON Formatter & Validator

  1. Paste your JSON into the input box.
  2. Click Format to indent it, or Minify to compact it.
  3. If there's a syntax error, read the message to locate the issue.
  4. Copy the formatted result.

Frequently Asked Questions

Does it validate my JSON?

Yes. If the JSON is malformed, the tool shows an error describing the problem so you can fix it quickly.

Is my data sent anywhere?

No. All parsing and formatting happens in your browser — your JSON never leaves your device, which matters for sensitive data.

What's the difference between format and minify?

Formatting adds indentation and line breaks for readability; minifying removes all unnecessary whitespace to make the smallest possible payload.

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