Coffee roasters are specialized machines or devices used to transform raw green coffee beans into roasted coffee. The roasting process involves applying heat to the beans, which causes chemical changes that develop their flavor, aroma, and color. Roasters can vary in size, from small home units to large commercial machines used by coffee shops and roasteries. The roasting process typically includes several stages: drying, browning, and development. Each stage affects the final taste of the coffee, allowing roasters to create a wide range of flavor profiles. Skilled coffee roasters carefully monitor temperature and time to achieve the desired roast level, whether light, medium, or dark.