[donbreo]

Requirements: -Windows

Looks like I'm out... Would be great if there was a google apps script alternative. My company gave all devs linux systems and the business team operates on windows. So I always use browser based tech like Gapps script for complex sheet manipulation

[jkman]

Well it's an excel add-in, how else would it work?

[NotMichaelBay]

Excel add-ins can be written with the Office JS API so that they can run on web as well as desktop for Windows and Mac. But I don't think OP's add-in is possible with that API unless the local model can be run in JS.