Gradio.Net is an open-source port of Gradio for the .NET platform, letting C# developers build demos and web applications for machine learning models and APIs without JavaScript, CSS, or web hosting experience. Published on GitHub under the Apache-2.0 license with about 335 stars, it is actively updated, most recently in October 2026.
Gradio in the Python world became popular because a few lines of code turn a function into a shareable web interface. Gradio.Net brings the same idea to ASP.NET Core: you install the NuGet package in a web API project, wrap a C# function with gr.Interface, and launch a working demo. For finer control, gr.Blocks lets you compose layouts with rows, textboxes, and buttons and wire click events to your functions. That makes it practical for .NET shops to publish interactive try-it pages for internal models, evaluation tools, or plain business functions that colleagues need to test in a browser.
Documentation and guides live in the repository, and the README is also published in Chinese and Japanese editions, reflecting an international .NET audience. The components mirror the shapes Python users already know from Gradio, including interfaces, blocks, rows, textboxes, sliders, and buttons, so developers who have seen Python Gradio examples can translate them into C# with very little friction.
Gradio.Net is free and open source under the Apache-2.0 license. There is no paid edition; you add the package to your own .NET application and host it wherever you like.
Gradio.Net is for .NET developers and teams who want Gradio-style interactive demos for models and services without leaving the C# ecosystem or hand-building a frontend.