Gimp Animated Gif Transparent Background. Here is a brief tutorial for adding alpha channel with GIMP. For GIFs with existing solid background you will have to select both original and new color.
Ctrl Shift A to turn off selection. When I try to make a gif with two frames both of which have a transparent background in GIMP what happens is that the first frame looks OK then the second frame appears on top of it such that you can see both frames at the same time. With Tenor maker of GIF Keyboard add popular Animated Gif Transparent Background animated GIFs to your conversations.
To resize your GIF simply go to Image - Scale Image.
Select the whole image with CtrlA and fill it with black Ctrl. It basically adds a transparent layer at the bottom of your image so when we erase the colorsits shows the transparent layer. So the best way is to save the image as a GIF since all major browers support transparency. Now you see the image with transparent background.