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JSON Formatter & Validator
Paste messy JSON to format, validate, or minify it instantly. No data is sent to any server.
Formatted JSON will appear here...
Free Online JSON Formatter
This JSON formatter lets you beautify, validate, and minify JSON data directly in your browser. No data is sent to any server—everything happens locally for complete privacy.
Features
- Format: Beautify minified JSON with customizable indentation
- Validate: Instant syntax error detection with helpful messages
- Minify: Compress JSON by removing whitespace
- Copy: One-click copy to clipboard
- Privacy: All processing happens in your browser
Common JSON Errors
- Trailing commas: Remove commas after the last item in arrays/objects
- Missing quotes: All keys must be quoted with double quotes
- Single quotes: JSON requires double quotes, not single quotes
- Comments: JSON does not support comments