Convert cis to png Online: cis2png

You can use Tom's Editor to easily convert images from
Compuserve RLE image .CIS to Portable Network Graphics .PNG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

CIS

Compuserve RLE image is an image format with extension CIS.

PNG

Portable Network Graphics is an image format with extension PNG.