YES for the paid versions: The Paid versions (Perpetual and Subscriptions) can be used offline. On a computer without access to internet, the "activate" button will guide you to the offline activation process. You will have to transfer one file back and forth between the offline computer and one online computer. (just read and follow instructions). NO for the Trial version: The Trial version needs to have access to internet. You can only try Quad Remesher online.