app-icon-generator
App Icon Generator
Generate complete sets of app icon assets for iOS, macOS, Android, and web/PWA from a single source image. Uses ImageMagick to resize and export icons in all required sizes, with optional Xcode-compatible .appiconset output.
Prerequisites
- ImageMagick must be installed:
brew install imagemagick - Source image should be at least 1024x1024 pixels and square (1:1 aspect ratio)
Workflow
1. Validate the Source Image
Before generating icons, verify the source image meets requirements:
- Confirm the file exists and is a valid image format (PNG, JPEG, SVG, TIFF)
- Check dimensions are at least 1024x1024
- Warn if the image is not square — icons will be force-resized to square
- PNG is preferred (lossless); JPEG is acceptable but may introduce artifacts at small sizes
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