How do you change picture formats on a mac computer?

I took a picture on photo booth and it%26#039;s in JPEG format. I want to upload it onto myspace but it wont let me because it has to be in jpg,.gif,.bmp,.tiff,.png format. Can I change it?|||jpg and jpeg are the same file type, so you can just rename it. gif, bmp, tiff and png are all different, and they%26#039;re all different than jpg, so renaming between them just causes the file to be useless. But you can open any of them in a graphics editor and save the picture as any other file type.|||If it%26#039;s .jpeg format, just click it, press Return to rename it, and retype the extension from .jpeg to .jpg. Easy. You can also change it to .bmp or .png that way.