Famous for founding Fazer, a successful Finnish company devoted to the production of food and candy products, he is also remembered for his participation (as a marksman) in the 1912 Olympic Games.
Before opening his first confectionery in the early 1890s, he trained as a baker in France, Russia, and Germany.
A nature enthusiast, he established several parks in his native Finland.
The son of a Swiss citizen named Eduard Peter Fazer, Karl Fazer spent his early years in Helsinki, Finland, and later settled in Jokioinen. He and his wife Berta raised four children; one of their grandchildren, Peter Fazer, became an Olympic sailor.
He and Norwegian actress Sonja Henie both competed in the Olympic Games.