A screen shot generator is a convenient tool in many situation. In case you want to see the last screen shot that Google has taken off your website on its crawler's last visit; there's some issue with your website and you want to take a screen shot and send it to your website hosting service; you are making changes to your website, or you have a developer doing that, and you need a screen shot to see the changes or maintain a history of them; do an online screenshot sharing with the site developer and exchange ideas on it.