Convert bmp to tn3 Online: bmp2tn3

You can use Tom's Editor to easily convert images from
Microsoft Windows bitmap .BMP to Tiny Stuff .TN3.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

BMP

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

TN3

Tiny Stuff is an image format with extension TN3.