Developer
JSON Formatter
Turn compact or messy JSON into clean, readable formatted JSON with one click.
Common questions
What does pretty-printing do?
Pretty-printing adds indentation, line breaks and spacing to make JSON human-readable. Minified JSON like {"a":1,"b":[2,3]} becomes formatted with nested indentation, making it easy to understand the structure.
What happens if my JSON is invalid?
The tool shows a clear error message with the line and position where the syntax error was found. Unlike many online formatters, it does not silently fix or alter your JSON — it tells you exactly what is wrong.
Can I adjust the indentation?
Yes. You can choose between 2 spaces, 4 spaces or tab indentation. The formatted output updates instantly when you change the setting.