This article is for Azure App Service (Web Apps, API Apps, Mobile Apps, Logic Apps); for Cloud Services, see Configuring a custom domain name for an Azure cloud service.
Note
If you app is load-balanced by Azure Traffic Manager, click the selector at the top of this article to get specific steps.
Custom domain names are not enabled for Free tier. You must scale up to a higher pricing tier, which may change how much you are billed for your subscription. See App Service Pricing for more information.