JSON Formatter & Validator
Paste JSON to beautify it with indentation, minify it for production, or validate it and get the exact error location. Nothing is sent anywhere — parsing happens in your browser.
🔒 100% private — files never leave your browser
How to use the JSON Formatter
- 1 Paste your JSON into the editor.
- 2 Click "Format" for pretty output, "Minify" to compact it, or validation runs as you type.
- 3 Copy the result with one click.
Frequently asked questions
How do I find where my JSON breaks?
When validation fails, the tool shows the exact line and column of the first syntax error plus a human-readable explanation.
Can it handle large JSON files?
Yes — several MB format in well under a second since parsing happens natively in your browser.
Is my JSON sent to a server?
No. Formatting and validation run entirely in your browser. Your files never leave your device — all processing happens locally in your browser.
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