The invention relates to a pneumatic tool drive system, comprising a portable pressure source, a valve assembly, a regulating assembly, and a pneumatic assembly. The pneumatic assembly can be any conventional pneumatic device. The pneumatic assembly may be a pneumatic tool, such as, but not limited to, a nail gun, a power sprayer, a torque wrench, and the like. The pneumatic tool drive system gives the operator the freedom to move about his work space free of cumbersome hoses and compressors.