Icon resizer automatically generates icons from a given image for Mac, iOS, Android or Windows applications.

Icon resizer uses ImageMagick's convert command.

To install it with Homebrew on macOS, you have to type the following command in Terminal:

brew install imagemagick

Use apt-get to install ImageMagick on Ubuntu:

apt-get install imagemagick

• -i - Path to input image
• -f – Filter to use for resizing (default: Cubic)
• -h – Display available options
• -p – Target platforms: macos, ios, android, windows

The following command generates icons for iOS and Windows from icon.png using Quadratic filter:

./resize_icon.sh -i icon.png -p ios windows -f Quadratic