Free. Cross-platform. Open source. A framework for building web apps and services with .NET and C#. Supported on Windows, Linux, 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 Build full stack web apps with HTML, CSS, and C# Develop REST APIs for a range of clients, including browsers and mobile devices Enable bi-directional communication between server and client, in real-time Artificial Intelligence and ML Build smart apps with C#, OpenAI, and Azure 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 with tools and libraries specifically for building web apps. Dig deeper: What is ASP.NET 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 Learn back-end web development Fast and scalable ASP.NET Core performs faster than any popular web framework in the independent TechEmpower benchmarks . Data sourced from official tests available at TechEmpower Round 23 . 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 on Stack Overflow , Microsoft Q&A , 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 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 . Host for free with Azure Read customer stories You may also be interested in these free e-books 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 View on the web View on the web 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 View on the web View on the web 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. Ready to get started? Our step-by-step tutorial will help you get ASP.NET running on your computer.