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ASP.NET Core
============
Free. Cross-platform. Open source.
A framework for building web apps and services with .NET and C#.
[Get started](/en-us/learn/aspnet/blazor-tutorial/intro)
Supported on Linux, Windows, and macOS
Build web apps fast with one stack
----------------------------------
ASP.NET Core comes with everything you need to build web apps including Blazor, a web UI framework for quickly creating fast, secure, and robust web apps that run anywhere.
[Learn about Blazor](/en-us/apps/aspnet/web-apps/blazor)
[
Web Apps
--------
Build full stack web apps with HTML, CSS, and C#
](/en-us/apps/aspnet/web-apps/blazor)
[
APIs
----
Develop REST APIs for a range of clients, including browsers and mobile devices
](/en-us/apps/aspnet/apis)
[
Real-time
---------
Enable bi-directional communication between server and client, in real-time
](/en-us/apps/aspnet/signalr)
[
Artificial Intelligence and ML
------------------------------
Build smart apps with C#, OpenAI, and Azure
](/en-us/apps/ai)
What is ASP.NET Core?
---------------------
.NET is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.
ASP.NET Core extends the [.NET developer platform](/en-us/learn/dotnet/what-is-dotnet) with tools and libraries specifically for building web apps.
[Dig deeper: What is ASP.NET Core?](/en-us/learn/aspnet/what-is-aspnet-core)
Learn ASP.NET Core
------------------
Learn all about ASP.NET Core has to offer with our tutorials, video courses, and docs.
[Learn front-end web development](/en-us/learn/front-end-web-dev)
[Learn back-end web development](/en-us/learn/back-end-web-dev)
Fast and scalable
-----------------
ASP.NET Core performs faster than any popular web framework in the independent [TechEmpower benchmarks](https://www.techempower.com/benchmarks/#hw=ph&test=plaintext).
Data sourced from official tests available at [TechEmpower Round 21](https://www.techempower.com/benchmarks/#section=data-r21&hw=ph&test=plaintext).
Build secure apps
-----------------
ASP.NET Core 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 Core provides a built-in user database with support for multi-factor authentication and external authentication with Google, X, and more.
Active community and open-source
--------------------------------
Get quick answers to questions with an [active community of developers](/en-us/platform/community) on [Stack Overflow](https://stackoverflow.com/questions/tagged/.net?sort=frequent), [Microsoft Q&A](https://learn.microsoft.com/answers/products/dotnet?WT.mc_id=dotnet-35129-website), and more.
[NET is open source](/en-us/platform/open-source) on GitHub, with over 100,000 contributions and 3,700 companies already contributing.
[Join the .NET community](/en-us/platform/community)
Free hosting on Azure
---------------------
Get 10 ASP.NET Core 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](/en-us/apps/aspnet/hosting).
[Host for free with Azure](https://azure.microsoft.com/services/app-service/web/?WT.mc_id=dotnet-35129-website)
[](/en-us/platform/customers#stack-overflow)[](/en-us/platform/customers#the-postage)[](/en-us/platform/customers#ampas)[](/en-us/platform/customers#nopcommerce)[](/en-us/platform/customers#burnrate)
[Read customer stories](/en-us/platform/customers)
You may also be interested in these free e-books
------------------------------------------------
### Blazor e-book
This free e-book introduces ASP.NET Web Forms developers to Blazor. It introduces Blazor concepts in parallel with analogous concepts in ASP.NET Web Forms.
* [Download PDF](/en-us/download/e-book/blazor-for-web-forms-devs/pdf)
* [View on the web](https://learn.microsoft.com/dotnet/architecture/blazor-for-web-forms-developers/?WT.mc_id=dotnet-35129-website)
### ASP.NET Core architecture e-book
This guide provides end-to-end guidance on building monolithic web applications using ASP.NET Core and Azure.
* [Download PDF](/en-us/download/e-book/aspnet/pdf)
* [View on the web](https://learn.microsoft.com/dotnet/architecture/modern-web-apps-azure/?WT.mc_id=dotnet-35129-website)
### Azure quick start e-book
In this short guide, explore Microsoft Azure services for a variety of .NET application scenarios. Quickly learn about the services that are right for you.
* [Download PDF](/en-us/download/e-book/azure-quick-start/pdf)
Ready to get started?
---------------------
Our step-by-step tutorial will help you get ASP.NET running on your computer.
[Get started](/en-us/learn/aspnet/blazor-tutorial/intro)
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