How to Make a GIF Smaller in GIMP. Use the free editor GIMP to adjust the size of a GIF file. Because the GIF extension supports animation, many programs are not capable of re-sizing an image ...

You can create animated banners using GIMP. GNU Image Manipulation Program aka GIMP is a popular free and open-source vector graphics designing software for Windows and other operating systems.

Resizing your images in GIMP is super easy, so if you want to learn how to get the job done, then click here to keep reading or tutorial.