Thread:Nkstjoa/@comment-30480843-20180929235645/@comment-5035900-20190123023426

In Google Slides, click on Help in the upper right, then a fill-in box will pop up as an option. Type in png (jpeg works as well) to get an option to download the slide, aka the image, in that format.

Click that and boom, you're all set, short of just renaming the image itself.