Painter and graphic artist. After leaving school, he worked in a bank until 1906 but he decided to attend courses at the School of Decorative Art in 1901. He lived in Paris between 1906-09 and was admitted to the École des Beaux-Arts. He wanted to become a portrait painter but he did sketches, too. He was a pupil of T.A. Steinlein. Between 1909-10 he attended the Academy in Florence.

In World War I he worked as a war correspondent together with MiklósVadász and János Vaszary. In 1908 he was awarded the Gold Medal for "Dining Room". His works were exhibited in the National Salon and in the Ernst Museum in 1916 and 1918 respectively. Between 1918-19 he did report sketches and when the Hungarian Soviet Republic was overthrown, he left Budapest for Weimar. Later he lived in Munich.

On his return to Hungary, his works were exhibited in the Ernst Museum in 1921 and 1922. Zádor, one of the founders of the Szinyei Society, was a successful portrait painter (e.g. the well-known portrait of Gizi Bajor, a famous actress of the time) and a graphic artist. The autumn of 1938 found him in the Netherlands. His major works include "Memoirs of a War Painter" 1914-1918, and "Budapest" 1945.