You are correct. The DMXzone smart image processor will
upload the .tif, then resize it and convert it to a .jpg file. The
.tif file is stored so that you can download it by clicking a link.
The app I've built is an image gallery. JPG thumbnails with
links to hi-res graphic files.
The smart image processor automatically creates the display
thumbnails, except in the case of .tifs. Which the software claims
can process.