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: 3.8.3

Requirements: macOS >= 12

Versions:

Intel tahoe 3.8.3
sequoia 3.8.3
sonoma 3.8.3
ventura 3.8.3
monterey 3.8.3

Analytics:

Installs (30 days)
elephicon 4
Installs (90 days)
elephicon 12
Installs (365 days)
elephicon 51