PixaMixa’s Ctrl+A image generator lets you hide a picture inside of another one using the “Microsoft Hidden Image” bug.

“Ctrl+A images” are images hidden inside other images which reveal themselves when selected in some Microsoft applications such as Internet Explorer and Microsoft Outlook. The name “Ctrl+A images” refers to the shortcut “Ctrl+A” which “Selects All” in these applications. It can be a fun way to make a joke such as hiding a picture of an old person inside a picture of your spouse then emailing with a caption like “Press Ctrl+A to see your future”.