elephicon

Install command: 
brew install --cask elephicon

Name: Elephicon

Create icns and ico files from png

https://github.com/sprout2000/elephicon/

Cask JSON API: /api/cask/elephicon.json

Cask code: elephicon.rb on GitHub

Current version: 3.7.4

Current version requires: macOS >= 11

Versions:

Intel tahoe 3.7.4
sequoia 3.7.4
sonoma 3.7.4
ventura 3.7.4
monterey 3.7.4
big sur 3.7.4

Analytics:

Installs (30 days)
elephicon 6
Installs (90 days)
elephicon 7
Installs (365 days)
elephicon 55