XnView Software

Everytime I try, it creates a corrupted image.

For example, I cropped this image and saved as .dds. Xnview then added extra space below the image and created a mirror image to the right.

I mean, look at this : https://i.imgur.com/IjdSDRH.jpg

You can see the image got corrupted somehow. Have tried re-saving multiple times, it just keeps coming out exactly the same.

could you send me the jpeg file that you convert (with wanted size)

Just use any jpeg file and try converting to DDS. I have tested it with different files, they ALL get a graphic corruption when converting to DDS.