HIIT workouts make great at-home workouts, because they can be performed anywhere, with any equipment you have on hand or with no equipment at all. You can do a HIIT workout while running, riding a bike (outdoors or stationary,) using dumbbells, or doing bodyweight exercises.
There are multiple forms for designing a HIIT workout.
If you're just getting started, a 2:1 ratio for a standard HIIT workout for only 10 to 15 minutes is a great program design.