You can draw offline, without internet, BUT, you need to save your drawing in file, since auto save is hard to make when offline. If you refresh, obviously, you will have a screen asking you to connect to the internet, but you can leave the tab on, a notification will tell you "You're currently on offline mode, learn more" You can make new canvases, but you will appear offline, you cannot join others, they cannot join you, so you're basically.. alone when offline. But, hey! You can still draw!