JSON Formatter

How to use it

1. Paste your JSON into the input box.
2. Click Format to pretty-print with indentation, or Minify to collapse to a single line.
3. Adjust the indent (2 spaces, 4 spaces, or tab) to match your preferred style.
4. Use the Copy button to copy the output to your clipboard.

Validation behavior

If the input is not valid JSON, the tool shows the underlying parser error from the browser’s native JSON.parse. The error includes a description of what was unexpected (trailing comma, missing quote, unexpected token, etc.) and often a character position to help locate the issue.

Privacy

All parsing happens in your browser via the built-in JSON.parse and JSON.stringify. The input never leaves your device — no data is sent to our servers, no logs are kept, no analytics are sent.

Common uses

• Debugging API responses — paste the raw response from a scraper or API call and instantly see the structure.
• Cleaning up minified JSON — format compressed config files or API payloads into readable form.
• Validating JSON syntax — catch trailing commas and missing quotes before pasting into code.
• Preparing for commits — minify before embedding in a script, or format before committing config to source control.