JSON Formatter & Validator
Paste your JSON data to instantly format, validate, and beautify it. Supports minification, syntax highlighting, and error detection with line numbers. Perfect for debugging API responses and configuration files.
How to use
- Paste your JSON into the input box.
- Click Format to pretty-print, or Minify to compress it.
- If there is a syntax error, fix it using the highlighted line/column.
- Copy the formatted JSON and use it in your app or API debugging workflow.
FAQ
Is my JSON sent to your server?
No. Formatting and validation run entirely in your browser. We don't transmit your input.
Does this tool validate JSON?
Yes. If your JSON is invalid, you'll see an error message with location details so you can fix it quickly.
Can I format large JSON files?
Yes, but extremely large inputs may be slow depending on your device. If it feels laggy, try minifying first or processing smaller chunks.