JSON Formatter & Validator
Validate JSON syntax, format with custom indentation, and minify in one place.
About This JSON Tool
The validator checks syntax instantly using your browser's JSON parser. Use Format Input to normalize spacing, Minify Input to remove whitespace, and Copy Formatted when you need readable output for docs or debugging.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Can this tool validate invalid JSON?
Yes. It checks JSON syntax and shows an error message when parsing fails.
Can I pretty-print and minify JSON here?
Yes. You can format JSON with indentation or minify it to a compact string.
Is my JSON data uploaded?
No. Parsing and formatting happen locally in your browser.
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