JSON Formatter & Validator
Format, validate, beautify, or minify JSON data. Real-time validation.
Input JSON
Formatted Output
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Free Online JSON Formatter
Format, validate, and beautify your JSON data instantly. Our tool provides real-time validation, syntax error detection, and one-click formatting.
Features
- Format/Beautify — Pretty-print JSON with proper indentation
- Validate — Real-time JSON syntax validation with error messages
- Minify — Remove whitespace to minimize JSON size
- Copy — One-click copy to clipboard
- Configurable indentation (2 spaces, 4 spaces, or tabs)
FAQ
Yes. All processing happens in your browser. No data is sent to any server.
Missing commas, unquoted keys, trailing commas, mismatched brackets, and all JSON syntax errors.
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