One TUI. Every surface.

Write it once

<!-- app.xaml — runs unchanged on every host -->
<TuiWindow>
  <Border BoxStyle="Double" BorderColor="Cyan">
    <StackPanel Orientation="Vertical">
      <TextBlock Text="Hello Tedd.TUI!" Foreground="Cyan"/>
      <TextBox x:Name="NameBox" Width="30"/>
      <Button Content="Submit" Click="OnSubmit"/>
    </StackPanel>
  </Border>
</TuiWindow>

// …or build the same tree in C#
var window = new TuiWindow
{
    Content = new Border
    {
        BoxStyle = BoxStyle.Double,
        BorderColor = TuiColor.Cyan,
        Child = new StackPanel { /* … */ }
    }
};

// terminal:
new TuiApp(window).Run();

Host it anywhere

Markdown, code & images — right in the console

Markdown rendering

MarkdownView live-parses markdown into styled character cells: headings, bold text, bullet lists, quotes, tables, inline code and hyperlinks. Fenced code blocks run through the syntax highlighter automatically, image references become real inline images, and every color and style comes from a swappable MarkdownTheme.

Code highlighting

CodeDocument tokenizes source with a PrismJS-style grammar engine and renders it as colored cells — standalone or inside markdown code fences. 27 grammars ship in the box: ASM 6502, ASP.NET, Bash, BASIC, Batch, C#, CIL, C-like, cshtml/Razor, CSS, CSV, Diff, JSON, JSON5, Lua, Markdown, NASM, Perl, PowerShell, Python, Regex, Rust, SQL, URI, WASM, XML/HTML and YAML — all themable per token type.

Image rendering

The Image control puts real bitmaps into the cell grid. Terminals with graphics support get pixel-perfect output — Sixel (Windows Terminal 1.22+ and VT340-style terminals), Kitty graphics, and the iTerm2 protocol (iTerm2, WezTerm, Ghostty). GUI and browser hosts composite the bitmap directly, and every other terminal falls back to truecolor half-block art. PNG, JPEG, GIF, WebP and more decode via Tedd.TUI.Imaging (Magick.NET), from disk or HTTP.

40+ controls in the box

Border, Button, Canvas, CheckBox, CodeDocument, ComboBox, ContentControl, DataGrid, DialogBox, DockPanel, Expander, Grid, GridSplitter, GroupBox, Image, ItemsControl, ListBox, MarkdownView, MenuBar, MenuItem, PasswordBox, ProgressBar, RadioButton, ScrollBar, ScrollViewer, Separator, Slider, StackPanel, TabControl, TabItem, Table, TextBlock, TextBox, TextEditor, ToggleButton, TreeView, TreeViewItem, TuiWindow, UniformGrid, WrapPanel

…plus WPF-style data binding, routed events, control templates, triggers, focus management, overlays and a mouse-aware input pipeline.

Screenshots

Install

dotnet add package Tedd.TUI                      # core: controls, layout, XAML
dotnet add package Tedd.TUI.Platform.Console     # terminal host
dotnet add package Tedd.TUI.Platform.Blazor      # browser host
dotnet add package Tedd.TUI.Platform.Wpf         # WPF host + designer preview
dotnet add package Tedd.TUI.Platform.Avalonia    # Avalonia host
dotnet add package Tedd.TUI.Platform.WinUI       # WinUI 3 host
dotnet add package Tedd.TUI.Platform.Maui        # .NET MAUI host