A Smaller GIF is a program for reducing the size of animated GIFs without affecting their appearance in any way. The recompressed animations are pixel-for-pixel equivalent to the original animations if fewer than 256 colours are used in the animation. (More than 256 colours may be used in GIFs; take a look at itsagif for more information on colourful GIFs.) It is often capable of reducing an animated GIF as most GIF programs do not maximally compress their output. A Smaller GIF also serves as a full function animated GIF viewer.