butler

butler is a small command-line tool that lets you:

• Upload builds of your games quickly & reliably to itch.io
• Generate patches and apply them offline
• Run a few other utility commands

When someone refers to the itch.io command-line tools, they're talking about butler.

butler is easily integrated into an automated build/deploy pipeline. Like most of the itch.io delivery infrastructure, it is open-source (MIT licensed):

• https://github.com/itchio/butler

It is also a good showcase of the Wharf open specification, using only openly documented algorithms and file formats, encouraging the development of compatible tools:

• https://docs.itch.ovh/wharf

And is used by the itch app for various operations.

Keep reading to learn how to use it! First you'll want to install butler.