>>26300180I use this, on the "Simple reduce" conversion
>http://pix.rd.net.br/conversor/Personally, I just take the picture and then lower the resolution, the most important part is the Width resolution, the height can be adjusted later, then after that comes the cleaning process, to delete all the unnecessary pixels in the middle,
I also recommend painting the picture with the same color pallet before anything else for a better result.
Another Anon uses this website and it doesn't require lowering the resolution, but I don't know how it works.
>https://www.pixel-stitch.net/ 