Online JSON Validator Tool

Reasons for Invalid JSON Object Types

• The JSON Object is Missing Quotes Around The Keys:

  Example:

  {
    name: "USA",
    population: 328.2
  }
  

  
• If JSON Object is Missing Key Value(s):

  Example:

  {
    "name": "USA",
    "population":
  }
  

• If JSON Object is having single quotes instead of double:

  Example:

  {
    'name': 'France',
    'capital': 'Paris'
  }
  

• The JSON has an Extra Trailing Comma:

  Example:

  {
    "name": "Germany",
    "capital": "Berlin",
    "population": 82.8,
  }
  

• The JSON is Missing Comma():

  Example:

  {
    "name": "Germany",
    "capital": "Berlin"
    "population": 82.8
  }
  

• Invalid Nested JSON:

  {
    "name": "China",
    "cities": [
      "Beijing",
      "Shanghai",
      "Guangzhou",
      {[
        "name": "Chengdu",
        "population": 16.3
      ]}
    ]
  }