Web Apps overview
App Service Web Apps is a fully managed compute platform that is optimized for hosting websites and web applications. This platform-as-a-service (PaaS) offering of Microsoft Azure lets you focus on your business logic while Azure takes care of the infrastructure to run and scale your apps.
The following 5-minute video introduces Azure App Service Web Apps.
In App Service, a web app is the compute resources that Azure provides for hosting a website or web application.
The compute resources may be on shared or dedicated virtual machines (VMs), depending on the pricing tier that you choose. Your application code runs in a managed VM that is isolated from other customers.
Your code can be in any language or framework that is supported by Azure App Service, such as ASP.NET, Node.js, Java, PHP, or Python. You can also run scripts that use PowerShell and other scripting languages in a web app.
For examples of typical application scenarios that you can use Web Apps for, see Web app scenarios and the Scenarios and recommendations section of Azure App Service, Virtual Machines, Service Fabric, and Cloud Services comparison.
Here are some key features of App Service that apply to Web Apps:
Multiple languages and frameworks - App Service has first-class support for ASP.NET, Node.js, Java, PHP, and Python. You can also run PowerShell and other scripts or executables on App Service VMs.
DevOps optimization - Set up continuous integration and deployment with Visual Studio Team Services, GitHub, or BitBucket. Promote updates through test and staging environments. Perform A/B testing. Manage your apps in App Service by using Azure PowerShell or the cross-platform command-line interface (CLI).
Global scale with high availability - Scale up or out manually or automatically. Host your apps anywhere in Microsoft's global datacenter infrastructure, and the App Service SLA promises high availability.
Connections to SaaS platforms and on-premises data - Choose from more than 50 connectors for enterprise systems (such as SAP, Siebel, and Oracle), SaaS services (such as Salesforce and Office 365), and internet services (such as Facebook and Twitter). Access on-premises data using Hybrid Connections and Azure Virtual Networks.
Security and compliance - App Service is ISO, SOC, and PCI compliant.
Application templates - Choose from an extensive list of application templates in the Azure Marketplace that let you use a wizard to install popular open-source software such as WordPress, Joomla, and Drupal.
Visual Studio integration - Dedicated tools in Visual Studio streamline the work of creating, deploying, and debugging.
In addition, a web app can take advantage of features offered by API Apps (such as CORS support) and Mobile Apps (such as push notifications). For more information about app types in App Service, see Azure App Service overview.
Besides Web Apps in App Service, Azure offers other services that can be used for hosting websites and web applications. For most scenarios, Web Apps is the best choice. For microservice architecture, consider Service Fabric, and if you need more control over the VMs that your code runs on, consider Azure Virtual Machines. For more information about how to choose between these Azure services, see Azure App Service, Virtual Machines, Service Fabric, and Cloud Services comparison.
To get started by deploying sample code to a new web app in App Service, follow the Deploy your first web app to Azure in 5 minutes tutorial. You'll need a free Azure account.
If you want to get started with Azure App Service before signing up for an Azure account, go to Try App Service, where you can immediately create a short-lived starter web app in App Service. No credit cards required; no commitments.