Born in Tours on 26 September 1892 to a seamstress and shoemaker, Voisin left school to apprentice as a butcher, court clerk, a car painter, and an itinerant worker.

After hearing Sébastien Faure speak, he joined him in La Ruche, where he worked as a handyman between 1912 and 1915.

He later kept the shop for Faure's periodical, Ce qu’il faut dire.

[1] In the postwar period through 1971, he managed a general food store.

He remained a pacifist and anarchist through the end of his life.