resource-manager-parameter-file.md

If you use a parameter file to pass parameter values during deployment, you need to create a JSON file with a format similar to the following example:

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentParameters.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "webSiteName": {
            "value": "ExampleSite"
        },
        "webSiteHostingPlanName": {
            "value": "DefaultPlan"
        },
        "webSiteLocation": {
            "value": "West US"
        },
        "adminPassword": {
            "reference": {
               "keyVault": {
                  "id": "/subscriptions/{guid}/resourceGroups/{group-name}/providers/Microsoft.KeyVault/vaults/{vault-name}"
               }, 
               "secretName": "sqlAdminPassword" 
            }   
        }
   }
}

The size of the parameter file cannot be more than 64 KB.

If you need to provide a sensitive value for a parameter (such as a password), add that value to a key vault. Retrieve the key vault during deployment as shown in the previous example. For more information, see Pass secure values during deployment.