ASP.NET
Free. Cross-platform. Open source.
A framework for building web apps and services with .NET and C#.

Supported on Windows, Linux, and macOS

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Web Apps
Build pages based on HTML5, CSS, and JavaScript, using C# for server-side logic

APIs
Develop REST APIs for a range of clients, including browsers and mobile devices

Real-time
Enable bi-directional communication between server and client, in real-time

Microservices
Create independently deployable microservices that run on Docker containers

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What is ASP.NET?
.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.

ASP.NET extends the .NET developer platform with tools and libraries specifically for building web apps.

Learn ASP.NET
Learn about all ASP.NET has to offer with our tutorials, video courses, and docs.

In the TechEmpower benchmarks, .NET processed 6.97 million requests per second, Java Servlet processed 2.55 million, and Node.js processed 0.83 million.
Data sourced from official tests available at TechEmpower Round 16.

Fast and scalable
ASP.NET performs faster than any popular web framework in the independent TechEmpower benchmarks.

Build secure apps
ASP.NET supports industry standard authentication protocols. Built-in features help protect your apps against cross-site scripting (XSS) and cross-site request forgery (CSRF).

ASP.NET provides a built-in user database with support for multi-factor authentication and external authentication with Google, Twitter, and more.

Active community and open-source
Get quick answers to questions with an active community of developers on StackOverflow, ASP.NET forums, and more.

ASP.NET is open source on GitHub, with over 60,000 developers and 3,700 companies already contributing.

Free hosting on Azure
Get 10 ASP.NET websites for free with Microsoft Azure.

You can also deploy to any major cloud platform, your own Linux or Windows servers, or one of many hosting providers.