Mobile Internet users are increasing every day, so it has becoming very important to offer a mobile mode website which is optimized for display on various mobile devices. There are some sites that are good to see when loaded in your computer, at times, other may find it hard to see when loaded in an iPhone screen.
There are various of sites that can be used to check the preview of a website in an iPhone. Safari browser comes closest to Mobile Safari. A special website below has an emulator which can render your website so that display how it looks in Safari browser of the iPhone. It is known as iPhonePreviewer.