This is the site I use. Load your pic and it will make it reduce the size. Right click on the pic and save it to your PC. It takes a 4MG pic and reduces it to less than 200k so it can be uploaded here. there are many sites that do this but i like this one because it is not intrusive. It doesn't throw a bunch of pop ups at me
JPEG Optimizer - Compress and Resize Your Digital Photos