JSON Formatter
Format, validate, and minify JSON data with instant error reporting.
JSON Input
Formatted JSON
Formatted JSON will appear here...
Frequently Asked Questions
What is the difference between formatting and minifying JSON?
Formatting (prettifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all whitespace to reduce file size for production use.
Why is my JSON showing an error?
Common causes include missing quotes around keys, trailing commas, unescaped special characters, or mismatched brackets. The formatter highlights the exact line where the error occurs.
Is my JSON data sent to any server?
No. All formatting and validation happens entirely in your browser using JavaScript. Your data never leaves your device.
Can I format very large JSON files?
Yes, the tool handles large JSON files. For extremely large files (10MB+) performance may vary depending on your device.
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