Format JSON with readable indentation.
How does JSON Formatter work?
JSON Formatter takes minified or messy JSON and re-indents it with 2-space formatting, parsing it exactly as strictly as JSON parsing works in any programming language. If the input is not valid JSON, the tool tells you instead of guessing.
How to use it
- Paste your raw or minified JSON into the box.
- Click "Format JSON".
- Copy the indented, readable result, or fix the reported error if the input was invalid.
Common use cases
- Reading a minified API response while debugging a request.
- Cleaning up a configuration file before committing it.
- Preparing a JSON example for documentation or a bug report.
Frequently asked questions
Does this validate that my JSON is correct?
Yes. If the input cannot be parsed as valid JSON, the tool shows "Invalid JSON" instead of a formatted result.
Is my data sent anywhere?
No, formatting happens entirely in your browser.