无线供电或称无线能量传输是一种不经由电导体将电力能量从发电设备或供电端转送到电力接收设备的技术。无线能量发送是一个通称，当中可使用多种不同技术达成，包括电场、磁场及电磁波。发射器把电能转换成相对应场的能量状态，传输经过一空间后由一个或多个接收器接收并转换回为电能。

无线能量传输技术分为两种类别：非辐射与辐射。非辐射技术在线圈之间以电感耦合，能量通过磁场发送。应用例子有电动牙刷充电、RFID及智能卡、心律调节器、电动车充电器。现在发展焦点是为流动电话等无线充电技术。辐射技术则以微波、激光等定向能波束把能量送，这种技术可以发送致较远距离，但发射一方必须瞄准接收一方发射。使用辐射技术的无线能量传输仍处于实验阶段，提议使用的用途有太阳能发电卫星及无人飞行载具。

Wireless power transfer (WPT) or wireless energy transmission is the transmission of electrical energy from a power source to an electrical load, such as an electrical power grid or a consuming device, without the use of discrete man-made conductors. Wireless power is a generic term that refers to a number of different power transmission technologies that use time-varying electric, magnetic, or electromagnetic fields. In wireless power transfer, a wireless transmitter connected to a power source conveys the field energy across an intervening space to one or more receivers, where it is converted back to an electrical current and then utilized. Wireless transmission is useful to power electrical devices in cases where interconnecting wires are inconvenient, hazardous, or are not possible.