Selective C(sp3)–H isothiocyanation represents a significant strategy for the synthesis of isothiocyanate derivatives. We report herein an electrochemicalbenzylic isothiocyanation in a highly chemo- and site-selective manner under external oxidant-free conditions. The high chemoselectivity is attributed to the facile in situ isomerization of benzylic thiocyanates to isothiocyanates. Notably, the method