Viewer may refer to: * File viewer, application software that decodes and displays the data in a computer file * Image viewer, a computer program capable of displaying digital images * Pocket Viewer, a range of personal digital assistants marketed by Casio * A person who is engaged in remote viewing * Slide viewer, a device for viewing slides of reversal film * Television viewer, television industry term for a person watching television * ViEWER, a computer program developed for studying visual perception in a virtual 3D environment * Waveform viewer, a software tool for viewing the signal levels of either a digital or analog circuit design

See also