Generator may refer to:

• Signal generator, electronic devices that generate repeating or non-repeating electronic signals
• Electric generator, a device that converts mechanical energy to electrical energy.
• Generator (circuit theory), an element in an abstract circuit providing a source of electricity
• Engine-generator, an electric generator with its own engine
• Wearable generator, a hypothetical generator that can be worn on the human body
• Gas generator a device, often similar to a solid rocket or a liquid rocket that burns to produce large volumes of relatively cool gas
• Motor–generator, a device for converting electrical power to another form
• Atmospheric water generator, a device capable of extracting water from air