Web graphics formats can be either bitmap (raster) or vector. The bitmap formats—GIF, JPEG, PNG, and WBMP—are resolution-dependent, meaning that a bitmap image’s dimensions, and possibly image quality, will change at different monitor resolutions. The vector formats—SVG and SWF—are resolution-independent and can be scaled up or down without losing any image quality. The vector formats can also include raster data. You can export from Save For Web & Devices to SVG and SWF in Adobe Illustrator only.