About JSON Formatter
Parse and format JSON locally with configurable indentation and approximate error location reporting.
JSON Formatter parses the complete document before producing beautified or compact output. Invalid syntax is rejected, and supported browser error positions are translated into an approximate line and column.
How to use it
- Enter or select your source data.
- Adjust the available options and run the tool.
- Review, copy, or download the result.
Common use cases
- Read compact API responses and webhook payloads.
- Validate configuration before committing or sending it.
- Minify JSON for a fixture, request, or embedded example.
Worked example
Turn a compact API response into readable two-space-indented JSON.
Limitations and responsible use
- Comments, trailing commas, NaN, and Infinity are not valid JSON and are rejected.
- Formatting does not validate values against a JSON Schema.
- Object key order is preserved as parsed; keys are not alphabetized.
Frequently asked questions
Does formatting change the data types?
No. Valid JSON values are parsed and serialized without intentionally converting their types.
Can it repair invalid JSON automatically?
No. It reports the parse error so you can correct the source deliberately.