JSON Viewer

JSON Fixer

Repair invalid JSON with missing quotes, trailing commas, comments, and more — instantly.

Online JSON Repair Tool

Paste broken JSON, click Fix, and get valid JSON instantly

// paste broken JSON here

Fixed JSON

Paste or upload invalid JSON to repair

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

Example Fix

Broken:

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

Fixed:

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

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