JSON Repair

About the JSON Repair

JSON Repair fixes text that is almost JSON: single quotes, unquoted keys, trailing commas, comments, Python True/None, missing commas and output that was cut off halfway. It also strips the Markdown fence and the chatty sentence an AI assistant puts around its answer, then lists every change it made and how sure it is of the result.

Everything runs in your browser, so your input is never uploaded to a server.

How to use the JSON Repair

1. Paste the broken JSON, the model's whole answer, a JavaScript object or a Python dict.
2. Read the message above the output: it lists what was fixed and a confidence score.
3. Check the repaired JSON, especially if the confidence is low, then copy or download it.

Examples

Here is the config:
```json
{
  // service settings
  name: 'api',
  "port": 8080,
  "debug": True,
  "hosts": ["a.example.com", "b.example.com",],
}
```

{
  "name": "api",
  "port": 8080,
  "debug": true,
  "hosts": [
    "a.example.com",
    "b.example.com"
  ]
}

{"user": {"id": 7, "name": "Ada", "roles": ["admin", "dev"

{
  "user": {
    "id": 7,
    "name": "Ada",
    "roles": [
      "admin",
      "dev"
    ]
  }
}

Common mistakes

• Trusting a repaired document blindly. A truncated answer is closed, not completed. If the last values matter, ask for the output again instead of using the repair.
• Quotes inside strings. In "she said "hi" to me" the inner quotes are escaped by guessing where the string ends. Check such values, or escape the quotes at the source.
• Several values at the top level. JSON Lines or two objects pasted one after another are combined into an array. If you meant only the first, delete the rest before repairing.

Works well with the JSON Repair

• JSON Validator: confirm the repaired document is valid and see its structure.
• JSON Formatter: sort keys or change the indentation of the result.
• JSON Escape / Unescape: unwrap JSON that was stringified inside a string first.

Frequently asked questions