JSON Formatter
Format and minify JSON instantly.
About this tool
JSON can be difficult to inspect when it is minified or displayed on one line. ToolAlto's JSON Formatter parses valid JSON and adds readable indentation and structure so you can inspect it more easily.
How to use it
- Paste valid JSON into the input area.
- Click Format JSON to pretty-print it.
- Review and copy the formatted result, or use Minify when you need compact JSON.
Formatting versus validation
Formatting makes valid JSON easier to read. It does not repair invalid syntax. If the formatter reports an error, use the JSON Validator to check the input and review the JSON validation guide for common mistakes.
Privacy
The formatting and minification happen in your browser using the built-in JSON parser and serializer. The tool does not need to upload your JSON to a ToolAlto server.
Frequently asked questions
How do I format JSON?
Paste valid JSON into the tool and click Format JSON. ToolAlto adds indentation and line breaks so the structure is easier to read.
What does a JSON formatter do?
A JSON formatter adds indentation and line breaks to valid JSON so its structure is easier to read.
Can a formatter fix invalid JSON?
No. Standard JSON formatting requires valid JSON first. Use the JSON Validator to identify syntax problems.
What is minified JSON?
Minified JSON removes unnecessary whitespace and produces a compact representation that is useful when a smaller text payload or one-line value is needed.
Is the JSON formatter free?
Yes. ToolAlto's JSON Formatter is free to use online.