How AI JSON Fixing Works

We've all been there. You're working with JSON from an API, a config file, or copy-pasted from somewhere, and it just won't parse. Missing quotes, trailing commas, unescaped characters—the error messages are cryptic and finding the issue manually is tedious. That's where our AI JSON fixer comes in.

What Problems Can AI Fix?

Our AI is specifically trained to handle the most common JSON syntax errors that developers encounter daily:

How It Works Under the Hood

When you click 'AI Fix', here's what happens behind the scenes:

1. Your malformed JSON is sent to our secure server
2. We forward it to OpenAI's GPT-4o-mini model with a specialized prompt
3. The AI analyzes the structure and identifies syntax errors
4. It generates corrected JSON while preserving your data
5. The fixed JSON is returned to your browser
6. You can preview and apply the fix with one click

Example: Before and After

Here's a real example of what the AI can fix:

{
  name: 'John Doe',
  age: 30,
  email: "john@example.com",
  // This is a comment
  hobbies: [
    'reading',
    'coding',
  ],
  address: {
    city: "New York"
    country: 'USA'
  }
}

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "hobbies": [
    "reading",
    "coding"
  ],
  "address": {
    "city": "New York",
    "country": "USA"
  }
}

In this example, the AI fixed: unquoted keys, single quotes, a JavaScript comment, trailing comma in the array, and a missing comma between object properties.

Usage Limits

We also have a size limit of 100KB per request. This is because larger JSON files would exceed the AI model's context window and result in incomplete fixes.

Privacy & Security

We take your data privacy seriously:

• Your JSON is never stored on our servers
• We don't log or analyze the content you send
• Data is transmitted securely via HTTPS
• OpenAI processes data according to their privacy policy
• The fixed JSON is immediately discarded after being sent back

When AI Can't Help

While our AI is powerful, there are some cases where it may struggle:

• Completely garbled or random text that isn't JSON-like
• Binary data or encoded content
• Extremely large files (over 100KB)
• Ambiguous structures where the intended format is unclear
• Multiple nested errors that compound each other

In these cases, the AI will return an error message explaining that it couldn't determine the correct structure.

Tips for Best Results

1. Make sure your input is at least somewhat JSON-like (has braces/brackets)
2. If the AI fails, try fixing obvious errors manually first
3. For very large files, split them into smaller chunks
4. Always review the AI's fix before using it in production
5. Use the validator first to see the specific error location

The Technology Behind It

We use OpenAI's GPT-4o-mini model, which offers an excellent balance of speed, accuracy, and cost-effectiveness. The model is given a carefully crafted system prompt that instructs it to:

• Focus only on syntax fixes, not data modification
• Preserve all original data values exactly
• Return only valid JSON, no explanations
• Handle edge cases gracefully
• Maintain the original structure and nesting

Try It Now

Ready to fix your broken JSON? Just paste it into the input box on the home page. If it doesn't validate, the 'AI Fix' button will become active. Click it, and within seconds you'll have working JSON.