Format, validate, and beautify JSON data online. Free JSON validator with syntax highlighting and error detection.
The JSON Formatter tool takes raw or minified JSON data and formats it with proper indentation and line breaks for readability. It also validates the JSON structure and highlights any syntax errors, making it invaluable for developers working with APIs and data files.
| Input | Output |
|---|---|
| {"name":"John","age":30} | Formatted with 2-space indentation |
| {"broken": json} | Error: Unexpected token at position 12 |
| [1,2,3,4,5] | Valid JSON array, formatted |