Convert atr to bmp Online: atr2bmp

You can use Tom's Editor to easily convert images from
Attributes .ATR to Microsoft Windows bitmap .BMP.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

ATR

Attributes is an image format with extension ATR.

BMP

Format created by Microsoft for their Windows and OS/2 operating systems. Images can be compressed or not.