Online Image to LED Matrix Converter Suggestions Help

Can someone please recommend a website where I can put in images, and have those images converted to different codes like hexa and binary arrays for my matrix displays.

I also need this program to be able to switch the size of the matrix because I have 8 x 8, 8 x 16, and 16 x 16 hardware to use. The programs I found online were all limited to 8 x 8 conversions.

Thank you!

had no luck finding the solution for 8x16 pal. only 8x8 so far.