TinyIcon

A tiny windows icon file (.ico) creator.

Define your wanted resolutions, import image, save. Done!

Features

• Multi-resolution icons: pick the sub-images your .ico should contain from 8×8 up to 256×256
• Colour depth: 24-bit and/or 32-bit entries, selectable independently of each other
• Import a source image (.png, .bmp, .jpg, .gif, .tiff) that gets downscaled into every sub-image
• Non-square sources are fitted and centred with transparent padding, so the aspect ratio is kept
• Full alpha transparency for 32-bit entries; 24-bit entries use a 1-bit mask
• Automatic encoding per sub-image: PNG for 256×256 32-bit entries, classic DIB/BMP for the rest
• Detail view with zoom (Ctrl +/-/*, or mouse wheel), pan (right mouse drag, right click recentres)
• Keyboard shortcuts for the whole workflow: Ctrl+N (new icon), Ctrl+I (import image), Ctrl+S (save icon)
• Remembers your window placement and the last resolution selection between runs

For more details, see the Changelog.

Build

From the command line

Prerequisites:

• .NET SDK 10.0 - install from https://dotnet.microsoft.com/

Build and run:

1. Build:

   dotnet build
   

2. Test (optional):

   dotnet test
   

3. Run:

   dotnet run --project Source\TinyIcon\TinyIcon.csproj
   

From Visual Studio 2026

Prerequisites:

• .Net Desktop development workload
• .Net 10.0 Runtime
• .Net SDK

Just open TinyIcon.slnx build and run.

Dependencies

• CommunityToolkit.Mvvm
• Microsoft.Xaml.Behaviors.Wpf

References

• Icons created from Fluent System Icons