JSON Formatter
Paste messy JSON, get it pretty-printed and validated instantly, or minify it down to one line.
How to use this tool
- Paste your JSON into the input box.
- Click Format to pretty-print with indentation, or Minify to compress it to one line.
- If the JSON is invalid, an error message shows exactly what's wrong.
Frequently asked questions
Yes — if your JSON has a syntax error, we show a clear error message instead of a formatted result.
No. Formatting and validation both happen locally using your browser's built-in JSON parser.