xnconvert

Install command: 
brew install --cask xnconvert

Name: XnSoft XnConvert

Image-converter and resiser tool

https://www.xnview.com/en/xnconvert/

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

Cask code: xnconvert.rb on GitHub

Current version: 1.105.0

Current version requires: macOS >= 10.12

Analytics:

Installs (30 days)
xnconvert 75
Installs (90 days)
xnconvert 241
Installs (365 days)
xnconvert 740
Fork me on GitHub