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

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Supported on Windows, Linux, and macOS

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.

Dig deeper: What is ASP.NET?


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

Learn to use ASP.NET

Fast and scalable

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

In the TechEmpower benchmarks, .NET processed 7.01 million requests per second, Node.js processed 0.66 million, and Java Servlet processed 2.17 million.

Data sourced from official tests available at TechEmpower Round 20.

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 Stack Overflow, ASP.NET forums, and more.

NET is open source on GitHub, with over 100,000 contributions and 3,700 companies already contributing.

Join the .NET community

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.

Host for free with Azure

Ready to Get Started?

Our step-by-step tutorial will help you get ASP.NET running on your computer.

Supported on Windows, Linux, and macOS

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