Image file formats

To display images in a web page browser, they have to be in a specific format. If your graphics were in the Windows Bitmap file format or Macintosh Picture File (PICT), browsers won't be able to show them. Therefore, graphics have to be in a specific format that the browser can understand for displaying. The most commonly used image file formats understood by browsers are GIF (Graphics Interchange Format) and JPEG (Joint Photographic Experts Group).