JSON Formatter
JSON formatting, minification, and syntax validation for developers
Formatted result will appear here... Tips
- Paste JSON code and click "Format" for auto-formatting
- Click "Minify" to remove whitespace and line breaks
- Automatic syntax validation with error highlighting
- One-click copy of formatted results
Why Format JSON? Essential Dev Tool for API Debugging
JSON is the universal data interchange format. Raw API responses are minified and unreadable. Pretty-print reveals structure instantly. This tool combines formatting, validation, and minification.
How JSON Validation Works
We use JavaScript's native JSON.parse() for strict validation. Common issues: trailing commas, single-quoted keys, comments (not valid in JSON). Errors pinpoint the exact position of the problem.
Frequently Asked Questions
How do I convert JSON to CSV?
JSON arrays map naturally to CSV tables. Format your JSON here, copy the result, then use a JSON-to-CSV converter. Use JSON for structured/nested data, CSV for flat tabular data.
Why am I getting "Unexpected token" in JSON?
Most common causes: single quotes instead of double quotes for keys, trailing commas after the last element, or comments. Our syntax highlighting helps you spot the issue quickly.
When should I minify JSON?
Minify for production — removing whitespace reduces payload size by 30-50%, speeding up API responses. Use pretty-print during development for readability. This tool handles both with one click.