JSON Validator

What is JSON Validation?

JSON validation checks whether your JSON data is syntactically correct according to the JSON specification. This tool helps you identify syntax errors, missing commas, unclosed brackets, and other common JSON mistakes.

How to Use

1. Paste your JSON data into the input field
2. Click "Validate JSON" to check the syntax
3. Review the validation result - success or detailed error message

Common JSON Errors

• Missing commas: Between object properties or array elements
• Trailing commas: After the last property or element (not allowed in JSON)
• Unquoted keys: Object keys must be in double quotes
• Single quotes: JSON requires double quotes for strings
• Unclosed brackets: Missing closing }, ], or "

Example - Valid JSON

{
  "name": "John Doe",
  "age": 30,
  "hobbies": ["reading", "coding"],
  "active": true
}

Example - Invalid JSON

{
  name: "John Doe",  // Keys must be quoted
  "age": 30,         // Trailing comma not allowed
}