JSON Formatter & Validator
Invalid JSON:
Free Online JSON Formatter & Beautifier
Instantly format, beautify, prettify, and validate your JSON data. This free JSON formatter takes messy, minified, or unformatted JSON and transforms it into clean, readable, properly indented code. Perfect for developers debugging APIs, working with configuration files, or analyzing data.
✨ JSON Beautifier
Prettify JSON with proper indentation and formatting. Makes minified JSON readable.
✓ JSON Validator
Validate JSON syntax instantly. Highlights exact error location for quick fixes.
🌳 Tree View
Interactive tree visualization. Click any value to copy its jq path.
How to use:
- Paste your JSON into the editor above
- Click Prettify to format and beautify JSON with indentation
- Click Compact to minify JSON to a single line
- Click Tree View for interactive exploration
Frequently Asked Questions
What is JSON formatting?
JSON formatting (also called beautifying or prettifying) adds proper indentation and line breaks to make JSON data human-readable. This formatter converts compact JSON like {"name":"John","age":30} into properly indented, multi-line output.
How do I validate JSON?
Paste your JSON and click Prettify. If there's a syntax error, the validator highlights the exact position and shows an error message. Common issues include missing commas, unquoted keys, or trailing commas.
Is my data safe?
Yes! All processing happens in your browser. Your JSON data is never sent to any server. This is a 100% client-side tool.