The source code is on GitHub if you want to install and run it yourself. It is available under the MIT license, which is one of the most liberal in terms of allowing you to do what you want with the code without restriction.
Multiple live versions (including current development branches) are served free of charge and free of ads on Grid.Space.
How does it compare to other slicers?
It has similar capabilities to other 3D printing slicers like Cura, Simplify3D, and PrusaSlicer.
It is very different in several important ways:
There is no software to install or maintain. It's just a web page.
As a web app, it runs in a security sandbox and cannot access data on your hard drive
It offers several modes of operation for most of the common maker tools, like CNC mills
It is updated quite frequently (several times a week) with bug fixes and new features
What language is it written in?
What file types are supported?
STL, OBJ, and 3MF files are supported for 3D part import. SVG files import and auto-convert into 3D models. PNG files are supported for 2D image to 3D model conversion.
What if my printer isn't supported?
You can either find a device close to yours and "customize" it in the device dialog. Or you can import a PrusaSlicer .ini file and it will auto-convert into Device + Profile settings. Caveat: macro logic is not automatically converted.
How can I get involved?
Start with the forum discussions. If you want to get involved with Kiri:Moto development, download the code and join the Discord server.
Where does the name come from?
Kiri comes from Kiri-e, which is the Japanese art of paper-cutting. Moto is short for "modeling tool".