Originally Posted by
RayC
You will need some sort of graphic editing program. Open the images up in the program, then, depending on the program, either select a conversion to change from CMYK to RGB, or simply re-save or export choosing RGB as the desired colour space.
You should really have some sort of graphics editing program available when doing web design. If you don't, IrfanView is a freeware program that is a handy tool to have. You can view just about any kind of graphics file and do some basic editing like resizing, colour adjustments, etc. I believe it works internally in RGB, so simply opening and re-saving your files is likely to do the conversion for you. There is also a batch processing function that you could set up to load, say, an entire folder, perform some function then save. In your case, simply open and re-save would do it.
HTH