A magnifier is a device used for magnification.
Magnifier can also refer to: Magnifying glass, an optical device for magnification Screen magnifier, software that magnifies part of a computer screen Magnifier (Windows), a screen magnifier for Microsoft Windows Magnifier (iOS), a magnifying glass app for iOS Magnifier, a magnifying glass app for Android Magnifying transmitter, alternate version of a Tesla Coil Sight magnifier, a magnified optic used on firearms
See also Video magnifier, an electronic device used for optical magnification