I'm one of the engineers on the team. We're really excited to be putting this out into the world. There's a massive amount of functionality in this thing that we're hoping will make the lives of everyone who needs to work with xlsx files better. Both programmatically and with a GUI.

See https://nobie.com/cli for the dev focused aspects, but I'm really proud of this thing, and happy that most people will be able to use it for free.

Happy to answer any questions people have.