#drag-and-drop
Mermaid NG — Visual Editor
NGPowerToys
WYSIWYG, drag-and-drop visual editor for AI-friendly Mermaid diagrams — what you see is what you get. For architects and developers — build, edit, and round-trip flowcharts, sequence, class, ER, and state diagrams across .md and .mmd files. Multi-sheet (draw.io style), fully offline (Mermaid 11.15.0
WinForms Designer for VS Code
SkivHisink
Visualize and edit WinForms .Designer.cs forms live inside VS Code — a Visual Studio-style designer surface, property grid, toolbox and event wiring, powered by a .NET 10 rendering engine.
Strander
BlazingCacti
Strander brings the Flowchart.fun authoring experience to VS Code! A split-view text/visual editor for .strand flowcharts with drag-and-drop layout, Material icons, CSS theming, and live preview.
Bootstrap Grid Layout Editor
bero-labs
Visually edit Bootstrap grid layouts in HTML and Angular templates — split, resize, offset and reorder, then apply back to your file.