Born in Poznań to an affluent family, Krull studied photography in Munich, where she opened her own studio in 1918. During this period she became an active member of the Communist Party, was arrested and expelled from Bavaria. She moved to Russia, but was imprisoned and expelled as an anti-Bolshevik, returning to Berlin to resume her photographic work. After meeting Dutch filmmaker Joris Ivens, she moved to Amsterdam and later settled in Paris, where she produced Métal, her celebrated portfolio of 64 photographs of industrial structures across Europe. From 1928 she collaborated with magazines such as Vu as a photojournalist, and later with Weekly Illustrated in Britain. She subsequently worked in Monte Carlo before moving to Brazil and French Equatorial Africa during World War II. After the war she settled in Bangkok, where she became co-owner of the Oriental Hotel.