JSON Fixer

Fix Broken JSON in Seconds

Accidentally broke your JSON? Missing quotes around keys? Trailing commas? Single quotes instead of double? jsonrepair fixes it all — automatically.

What This Tool Fixes

• Missing or mismatched quotes around object keys
• Trailing commas in objects and arrays
• Single quotes instead of double quotes
• Unquoted property names
• Comments (// or /* */)
• Missing commas between properties
• JavaScript-style values like undefined or NaN

{
  name: 'John'
  age: 30,
  active: true
}

{
  "name": "John",
  "age": 30,
  "active": true
}

100% client-side • No data sent to servers • Works with large files