The JSON format is also simple and easy to read for users, but more program-friendly. Because it has data types (number, string, Boolean, and object), it is popular to exchange the data between systems. Technically, YAML is a superset of JSON, so JSON is a valid YAML, but not the other way around. To know more about JSON, you can refer to the following website link: http://json.org/. 

The following example of the Pod is the same as the preceding YAML format, but using the JSON format:

$ cat nginx-pod.json
{
  "apiVersion": "v1",
  "kind": "Pod",
  "metadata": {
       "name": "my-nginx",
       "labels": {
              "env": "dev"
       }
  },
  "spec": {
    "containers": [
      {
        "name": "my-nginx",
        "image": "nginx",
        "ports": [
          {
            "containerPort": 80    
          }
        ]
      } 
    ]
  }
}