Music-wise, the festival is actually very unconcerned about genres and hosts music that ranges from rock, punk and black metal to ska, grindcore and psychobilly. Still, the main expression is punk rock, played more or less by bands from Slovenia, who are sometimes joined by bands from neighbouring countries and occasionally from elsewhere as well.
Some of the bands hosted at Kramp Fest are Muškat Hamburg, Joko Ono, Indust Bag, Alkohol, Dance Mamblita, Extreme Smoke 57, Vivere Merda (IT), Hijos del pueblo (HR),...