He is best known as being a pillar of Tintin and Strapontin from 1962 to 1975 working alongside René Goscinny, and was an author "Représentatif de la bande dessinée Franco-Belge classique".

At the age of 25 Jacques Acar began his career in professional comics as a writer, writing short stories for Tintin.

In the late 1960s Acar also worked for Line, Record (mainly with Jim Steward on Stanley, Catriona MacKilligan with Claude Auclair, etc.)

In the early 1970s he adapted Tounga, Bernard Prince, Bruno Brazil and Les Panthères for Tintin Sélection into novels.

Acar has also published science fiction novels, including two at Fleuve Noir, in the "Anticipation" collection, under the pseudonym of Vincent Gallaix.