Thunar jẹ oluṣakoso faili fun Lainos ati awọn ọna ṣiṣe bii Unix miiran, ti a kọ ni ibẹrẹ ni lilo ohun elo irinṣẹ GTK + 2 ati lẹhinna gbe lọ si ohun elo irinṣẹ GTK+ 3. O bẹrẹ lati gbe pẹlu Xfce ni ẹya 4.4 RC1 ati nigbamii. Thunar jẹ idagbasoke nipasẹ Benedikt Meurer, ati pe a pinnu ni akọkọ lati rọpo XFFM, oluṣakoso faili iṣaaju ti Xfce. O jẹ akọkọ ti a npe ni Filer ṣugbọn o yipada si Thunar nitori ikọlu orukọ kan. Thunar jẹ apẹrẹ lati bẹrẹ ni iyara ati ki o ṣe idahun diẹ sii ju diẹ ninu awọn oluṣakoso faili Linux miiran, gẹgẹbi Awọn faili GNOME ati Konqueror. Wiwọle jẹ aṣeyọri nipa lilo Ohun elo Irinṣẹ Wiwọle GNOME. Bii iyoku ti Xfce, Thunar jẹ apẹrẹ lati ni ibamu pẹlu awọn iṣedede, gẹgẹbi awọn ti a sọ ni freedesktop.org. Thunar rọrun ati iwuwo fẹẹrẹ nipasẹ apẹrẹ, ṣugbọn iṣẹ ṣiṣe rẹ le faagun nipasẹ awọn afikun.