The Sindicatos Libres (Spanish for "Free Trade Unions"; Catalan: Sindicats Lliures) was a Spanish company union born in Barcelona, Catalonia. It was established by Carlist workers, and remained active during the early interwar period (the late stages of Restoration Spain) as a counterweight to the anarcho-syndicalist Confederación Nacional del Trabajo. The group aided employers take action against striking unionists, and was thus criticized as a "yellow union" with proto-fascist leanings; however, its regular members were in practice freely moving between right- and left-wing unionism. The Sindicatos lost momentum during the dictatorship of Miguel Primo de Rivera, and eventually dissolved when the Second Spanish Republic was proclaimed.