JSON Formatter, Validator & Fixer
Fix common issues, format, validate, and export your JSON data. Handles single quotes, comments, unquoted keys, and more automatically.
🚀 How it works
💡 Got errors? Try the "Fix & Format" button to auto-repair common JSON issues!
Input JSON
Formatted JSON
Auto-Fix Common Issues
Fixes single quotes, comments, unquoted keys, trailing commas automatically with one click.
Validate & Format
Instantly check syntax, beautify with indentation, and get detailed error messages.
Export & Download
Copy minified for production, download as .json file, or copy formatted version.
Lightning Fast
Real-time processing, works offline, handles large JSON files up to 10MB instantly.
Common JSON Issues We Fix
Single Quotes
{'name': 'John'}JSON requires double quotes around strings.
Trailing Commas
{"name": "John",}JSON doesn't allow trailing commas after the last item.
Comments
// Comment
/* Comment */JSON doesn't support comments - they must be removed.
Unquoted Keys
{name: "John"}Object keys must always be quoted in JSON.
Multi-line Strings
"Line 1
Line 2"Strings must be on single lines with \\n for breaks.
All Fixed!
{"name": "John"}Clean, valid JSON ready to use in your applications.
Click "Sample" above to see all these issues in action, then use "Fix & Format" to see the magic!