Which image formats work in web browsers?
There is no standard which says “Browsers must support image type X”. There are official “Internet Media Type” specifications, which state how various image formats are supposed to behave . Almost all browsers (except Lynx) can render GIFs and JPEGs. Netscape Navigator 3.01 can view X bitmaps (.xbm) natively as well. Netscape Communicator 4.04 and later is able to view PNGs in-line as well. MS Internet Explorer 3 can view MS bitmaps (.bmp) in addition to GIF and JPEG images, and Internet Explorer 4 is supposed to be able to view PNGs, too. Until 4.0 browsers become common, you may want to stick with JPEGs and GIFs, or at least provide alternate GIF or JPEG images for people who can’t view PNGs. See any good HTML reference for how to do this.
