Vaporizer or vaporiser may refer to:

• Anesthetic vaporizer, a device used in the administration of anesthesia
• Electronic cigarette, or a part of one (often called a "PV" or "personal vaporizer")
• Humidifier, a household appliance that increases humidity
• Vaporizer (inhalation device), a device used to extract for inhalation the active ingredients of chemicals or plant materials
• Vaporizer (internal combustion engine), a device to enable an engine to run on tractor vaporizing oil
• Metal vapor synthesis, a technique that involves vaporizing metals

• Atomization (disambiguation)
• Carburetor
• Nebulizer
• Ultrasonic nozzle