Microsoft has added a feature to PowerPoint, export as .GIF. 

Export a single slide, or a series of slides as an animated .gif. Our tests have done a good job with capturing animations, slide transitions and timing – all with good size files.

The Export as Animated GIF is very similar to the Export as Video.

  • Go to FILE > select EXPORT
  • Select CREATE AN ANIMATED GIF
  • Select a size and quality option