UThunar ngumphathi wefayile weLinux kunye nezinye iinkqubo ezifana ne-Unix, ezibhalwe ekuqaleni kusetyenziswa i-GTK+ 2 toolkit kwaye kamva yafakwa kwi-GTK+ 3 toolkit. Yaqala ukuthunyelwa ngenqanawa kunye ne-Xfce kwinguqulo ye-4.4 RC1 kwaye kamva. I-Thunar iphuhliswe nguBenedikt Meurer, kwaye yayijoliswe ekuthatheni indawo ye-XFFM, umphathi wefayile yangaphambili ye-Xfce. Ekuqaleni yayibizwa ngokuba yiFayile kodwa yatshintshwa yaba yiThunar ngenxa yokungqubana kwegama. IThunar yenzelwe ukuqalisa ngokukhawuleza kwaye iphendule ngakumbi kunabanye abaphathi befayile yeLinux, njengeeFayile zeGNOME kunye neKonqueror. Ukufikeleleka kufezekiswa kusetyenziswa i-GNOME Accessibility Toolkit. Njengayo yonke i-Xfce, iThunar yenzelwe ukuthobela imigangatho, efana naleyo ichazwe kwi-freedesktop.org. I-Thunar ilula kwaye ikhaphukhaphu ngoyilo, kodwa ukusebenza kwayo kunokwandiswa ngeeplagi.