Vanillin, (also known as methyl vanillin), is an organic compound with the molecular formula C8H8O3. Its functional groups include aldehyde, ether, and phenol. vanillin is the primary component of the extract of the vanilla bean. It is also found in roasted coffee and the Chinese red pine. Methyl vanillin is used by the food industry as well as ethylvanillin.

Vanillin is also used in the fragrance industry, in perfumes, and to mask unpleasant odors or tastes in medicines, livestock fodder, and cleaning products.