Write online. Share the app.
Snippets compile in your browser — C# with Roslyn, or TSX with React — and draw on the same Skia canvas. Edit existing ones or write your own, then share, embed and export. The C# runs unchanged in .NET MAUI, Blazor and OpenTK apps.
Community
Live compile
Roslyn runs on WebAssembly inside the tab, and TSX is compiled there too. Edit, press Run — or let HotReload rebuild on every keystroke once the code is clean.
One engine, two languages
The same drawn controls, the same property names: DrawnUI in C# runs unchanged in .NET MAUI, Blazor and OpenTK, and DrawnUI for React puts the same engine in any web app.
Share and embed
Every fiddle becomes a short link, an iframe you can drop into a blog, a screenshot, or a standalone web app that boots without the editor.
AI-ready
Ships with llms.txt, an HTTP API and agent skills — let your assistant write, share and test fiddles for you.
