In 1842 he and two of his other contributors founded Kolo, one of Croatia's first literary magazines. The magazine, as well as his works, were influenced by national romanticism.
Regarding the Slovene language, Vraz's most notable work is the work Narodne pesmi ilirske, koje se pevaju po Štajerskoj, Kranjskoj, Koruškoj i zapadnoj strani Ugarske (Illyrian Folk Songs Sung in Styria, Carniola, Carinthia and the Western Part of Hungary). It contains folk songs and art songs in Slovene, accompanied by comments in Croatian. These songs are the first Slovene texts in Gaj's Latin Alphabet. This orthography was already used at the time by Croats and spread among Slovenes a few years later. Vraz created numerous poems in Slovene but for the most part they have never been published.