WinUIpad 2026

About

WinUIpad is Paul Thurrott's open-source Notepad-style text editor for Windows 11, rebuilt from his earlier WPF .NETpad using C#, WinUI 3 and the Windows App SDK, with a multi-document tabs version published in 2026. The repository description states it was written 'now with some help from AI (Clairvoyance and Anthropic Claude Pro)', and Thurrott wrote a companion article titled 'And Now I've Vibe-Coded a Native Windows 11 App'. It is distributed as source code on GitHub.