Thunar shine mai sarrafa fayil don Linux da sauran tsarin kamar Unix, da farko an rubuta ta amfani da kayan aikin GTK+ 2 kuma daga baya aka tura zuwa kayan aikin GTK+ 3. Ya fara jigilar kaya tare da Xfce a cikin sigar 4.4 RC1 kuma daga baya. Benedikt Meurer ya haɓaka Thunar, kuma an yi niyya ne don maye gurbin XFFM, mai sarrafa fayil na baya na Xfce. Da farko an kira shi Filer amma an canza shi zuwa Thunar saboda rikicin suna. An ƙirƙira Thunar don farawa da sauri kuma ya zama mai saurin amsawa fiye da wasu manajan fayilolin Linux, kamar Fayilolin GNOME da Konqueror. Ana samun dama ta amfani da Kayan aikin Samun damar GNOME. Kamar sauran Xfce, Thunar an tsara shi don bin ka'idoji, kamar waɗanda aka bayyana a freedesktop.org. Thunar mai sauƙi ne kuma mai nauyi ta ƙira, amma ana iya ƙara aikinsa ta hanyar plugins.