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: 3.8.2

Requirements: macOS >= 12

Versions:

Intel tahoe 3.8.2
sequoia 3.8.2
sonoma 3.8.2
ventura 3.8.2
monterey 3.8.2

Analytics:

Installs (30 days)
elephicon 3
Installs (90 days)
elephicon 10
Installs (365 days)
elephicon 52