Simple Spout Overlay

Simple Spout Overlay is a Windows desktop app for building transparent overlays and sending them directly to Spout in real time.

What You Can Do

• Build overlays with both text layers and image layers
• See a live 1920x1080 preview that matches the Spout output
• Drag layers directly in the preview to position them visually
• Use optional edge/center snapping while dragging for cleaner alignment
• Reorder layers with drag-and-drop, or Move Up / Move Down
• Edit per-layer properties (text, font, colors, outline, position, scale, image source)
• Undo/redo layer edits, including slider changes as a single undo step per drag
• Save and load setups as JSON files
• Auto-load your last default session on startup and auto-save on close

Quick Start

Recommended: Download from GitHub Releases

The easiest way to get started is to download the latest version from Releases.

Alternative: Build from source

Requirements:

• Windows 10/11 x64
• .NET 8 SDK

From the repository root:

dotnet restore
dotnet build .\SimpleSpoutOverlay\SimpleSpoutOverlay.csproj -c Release

Release binaries will be generated under:

SimpleSpoutOverlay\bin\Release\net8.0-windows\

Optional: run directly from source during development:

dotnet run --project .\SimpleSpoutOverlay\SimpleSpoutOverlay.csproj -c Release

Keyboard Shortcuts

• Ctrl+Z - Undo
• Ctrl+Y - Redo
• Ctrl+S - Save setup
• Ctrl+O - Load setup
• Ctrl+N - Add text layer
• Ctrl+Delete - Delete selected layer
• Ctrl+Up - Move selected layer up (when the layer list is focused)
• Ctrl+Down - Move selected layer down (when the layer list is focused)

Setup Files and Persistence

• Save/load setup files manually with the Session buttons (.json).
• Default auto-save session path: %AppData%\SimpleSpoutOverlay\session.json
• The app also remembers your last manual setup folder for faster save/load dialogs.

Spout Notes

• The top-right button changes state between Start Spout and Spout Active.
• If your receiver does not see the stream, restart Spout from the app and reselect SimpleSpoutOverlay in the receiver.