I dont think there will be loss of the quality. My program output images at 3 mega pixels, and according my researches, because pixel density is pretty low, 2mb->1mb wont change much. You can check it here. No differences at all:
https://twinlens.app/compare?share=985f60f3da0e
Yes, most probably I finish it. I wonder if I should to compress images to 1mb each instead of 2mb. That will be probably better for this forum to store all comics.