Excel to json file from Excel VBA

I want to have a button in an excel document (using VBA) which, takes in the data on the sheet and outputs a file (.json). Which I can then use later on within a web page.

I my excel data looks like this:

Note I would like to have more than one instance of data. I want it to generate a json file in the format of:

{"Excel_test": [
		{"name" : "tesintg1","age" : 15
		},
		{"name" : "testng2","age" : 1
		},
		{"name" : "testing3","age" : 435
		}
	]
}
Thanks