A method and apparatus are provided for reducing flicker of an image defined in HTML format for display on a television monitor. When an image is received at a client computer that uses a television monitor and a browser to display HTML. documents, spatial analysis is performed on the image to determine whether the image would exhibit a tendency to flicker if it were to be displayed unmodified on the television monitor. One reason that flicker can be experienced is the interlaced nature of the television monitor, which can result in some portions of images being displayed on only one of the two fields in a frame depending on the spatial frequency of the portions of the image. If the spatial analysis indicates that the image would exhibit a tendency to flicker, a flicker reduction filter is selected and applied to the image before it is displayed on the television monitor using the browser. Otherwise, the browser displays the image without flicker reduction filtering.