convert cloudformation template yaml file to json file

cloudformation.template.json

{
  "Description": "This template deploys a VPC, with a pair of public and private subnets spread\nacross two Availability Zones. It deploys an Internet Gateway, with a default\nroute on the public subnets. It deploys a pair of NAT Gateways (one in each AZ),\nand default routes for them in the private subnets.",
  "Parameters": {
    "EnvironmentName": {
      "Description": "An environment name that will be prefixed to resource names",
      "Type": "String"
    },
    "VpcCIDR": {
      "Description": "Please enter the IP range (CIDR notation) for this VPC",
      "Type": "String",
      "Default": "10.192.0.0/16"
    },
    "PublicSubnet1CIDR": {
      "Description": "Please enter the IP range (CIDR notation) for the public subnet in the first Availability Zone",
      "Type": "String",
      "Default": "10.192.10.0/24"
    },
    "PublicSubnet2CIDR": {
      "Description": "Please enter the IP range (CIDR notation) for the public subnet in the second Availability Zone",
      "Type": "String",
      "Default": "10.192.11.0/24"
    },
    "PrivateSubnet1CIDR": {
      "Description": "Please enter the IP range (CIDR notation) for the private subnet in the first Availability Zone",
      "Type": "String",
      "Default": "10.192.20.0/24"
    },
    "PrivateSubnet2CIDR": {
      "Description": "Please enter the IP range (CIDR notation) for the private subnet in the second Availability Zone",
      "Type": "String",
      "Default": "10.192.21.0/24"
    }
  },
  "Resources": {
    "VPC": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": {"Ref": "VpcCIDR"},
        "EnableDnsSupport": true,
        "EnableDnsHostnames": true,
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Ref": "EnvironmentName"}
          }
        ]
      }
    },
    "InternetGateway": {
      "Type": "AWS::EC2::InternetGateway",
      "Properties": {
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Ref": "EnvironmentName"}
          }
        ]
      }
    },
    "InternetGatewayAttachment": {
      "Type": "AWS::EC2::VPCGatewayAttachment",
      "Properties": {
        "InternetGatewayId": {"Ref": "InternetGateway"},
        "VpcId": {"Ref": "VPC"}
      }
    },
    "PublicSubnet1": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "AvailabilityZone": {"Fn::Select": [0, {"Fn:GetAZs":  ""}]},
        "CidrBlock": {"Ref": "PublicSubnet1CIDR"},
        "MapPublicIpOnLaunch": true,
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Public Subnet (AZ1)"}
          }
        ]
      }
    },
    "PublicSubnet2": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "AvailabilityZone": {"Fn::Select": [1, {"Fn::GetAZs":  ""}]},
        "CidrBlock": {"Ref": "PublicSubnet2CIDR"},
        "MapPublicIpOnLaunch": true,
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Public Subnet (AZ1)"}
          }
        ]
      }
    },
    "PrivateSubnet1": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "AvailabilityZone": {"Fn::Select": [0, {"Fn::GetAZs": ""}]},
        "CidrBlock": {"Ref": "PrivateSubnet1CIDR"},
        "MapPublicIpOnLaunch": false,
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Private Subnet (AZ1)"}
          }
        ]
      }
    },
    "PrivateSubnet2": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "AvailabilityZone": {"Fn::Select": [1, {"Fn::GetAZs": ""}]},
        "CidrBlock": {"Ref": "PrivateSubnet2CIDR"},
        "MapPublicIpOnLaunch": false,
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Private Subnet (AZ2)"}
          }
        ]
      }
    },
    "NatGateway1EIP": {
      "Type": "AWS::EC2::EIP",
      "DependsOn": "InternetGatewayAttachment",
      "Properties": {
        "Domain": "vpc"
      }
    },
    "NatGateway2EIP": {
      "Type": "AWS::EC2::EIP",
      "DependsOn": "InternetGatewayAttachment",
      "Properties": {
        "Domain": "vpc"
      }
    },
    "NatGateway1": {
      "Type": "AWS::EC2::NatGateway",
      "Properties": {
        "AllocationId": {"Fn::GetAtt": ["NatGateway1EIP", "AllocationId"]},
        "SubnetId": {"Ref": "PublicSubnet1"}
      }
    },
    "NatGateway2": {
      "Type": "AWS::EC2::NatGateway",
      "Properties": {
        "AllocationId": {"Fn::GetAtt": ["NatGateway2EIP", "AllocationId"]},
        "SubnetId": {"Ref": "PublicSubnet2"}
      }
    },
    "PublicRouteTable": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Public Routes"}
          }
        ]
      }
    },
    "DefaultPublicRoute": {
      "Type": "AWS::EC2::Route",
      "DependsOn": "InternetGatewayAttachment",
      "Properties": {
        "RouteTableId": {"Ref": "PublicRouteTable"},
        "DestinationCidrBlock": "0.0.0.0/0",
        "GatewayId": {"Ref": "InternetGateway"}
      }
    },
    "PublicSubnet1RouteTableAssociation": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "PublicRouteTable"},
        "SubnetId": {"Ref": "PublicSubnet1"}
      }
    },
    "PublicSubnet2RouteTableAssociation": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "PublicRouteTable"},
        "SubnetId": {"Ref": "PublicSubnet2"}
      }
    },
    "PrivateRouteTable1": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Private Routes (AZ1)"}
          }
        ]
      }
    },
    "DefaultPrivateRoute1": {
      "Type": "AWS::EC2::Route",
      "Properties": {
        "RouteTableId": {"Ref": "PrivateRouteTable1"},
        "DestinationCidrBlock": "0.0.0.0/0",
        "NatGatewayId": {"Ref": "NatGateway1"}
      }
    },
    "PrivateSubnet1RouteTableAssociation": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "PrivateRouteTable1"},
        "SubnetId": {"Ref": "PrivateSubnet1"}
      }
    },
    "PrivateRouteTable2": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {"Ref": "VPC"},
        "Tags": [
          {
            "Key": "Name",
            "Value": {"Fn::Sub": "${EnvironmentName} Private Routes (AZ2)"}
          }
        ]
      }
    },
    "DefaultPrivateRoute2": {
      "Type": "AWS::EC2::Route",
      "Properties": {
        "RouteTableId": {"Ref": "PrivateRouteTable2"},
        "DestinationCidrBlock": "0.0.0.0/0",
        "NatGatewayId": {"Ref": "NatGateway2"}
      }
    },
    "PrivateSubnet2RouteTableAssociation": {
      "Type": "AWS::EC2::SubnetRouteTableAssociation",
      "Properties": {
        "RouteTableId": {"Ref": "PrivateRouteTable2"},
        "SubnetId": {"Ref": "PrivateSubnet2"}
      }
    },
    "NoIngressSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "GroupName": "no-ingress-sg",
        "GroupDescription": "Security group with no ingress rule",
        "VpcId": {"Ref": "VPC"}
      }
    }
  },
  "Outputs": {
    "VPC": {
      "Description": "A reference to the created VPC",
      "Value": {"Ref": "VPC"}
    },
    "PublicSubnets": {
      "Description": "A list of the public subnets",
      "Value": {"Fn::Join":  [",", [{"Ref": "PublicSubnet1"}, {"Ref": "PublicSubnet2"}]]}
    },
    "PrivateSubnets": {
      "Description": "A list of the private subnets",
      "Value": {"Fn::Join":  [",", [{"Ref": "PrivateSubnet1"}, {"Ref": "PrivateSubnet2"}]]}
    },
    "PublicSubnet1": {
      "Description": "A reference to the public subnet in the 1st Availability Zone",
      "Value": {"Ref": "PublicSubnet1"}
    },
    "PublicSubnet2": {
      "Description": "A reference to the public subnet in the 2nd Availability Zone",
      "Value": {"Ref": "PublicSubnet2"}
    },
    "PrivateSubnet1": {
      "Description": "A reference to the private subnet in the 1st Availability Zone",
      "Value": {"Ref": "PrivateSubnet1"}
    },
    "PrivateSubnet2": {
      "Description": "A reference to the private subnet in the 2nd Availability Zone",
      "Value": {"Ref": "PrivateSubnet2"}
    },
    "NoIngressSecurityGroup": {
      "Description": "Security group with no ingress rule",
      "Value": {"Ref": "NoIngressSecurityGroup"}
    }
  }
}

The origin file is here