https://enrolmy.com/fun-zone/track/hTQMqNptpUSTSjBf0UnFkc22hVB_nUKQwBhKWcfAEBDZA6EAkqls7S21zqpUb1UnUCMZeFF2XLhx2rLiqIS4RUcf2VYUMqW2?href=http://gfctech.co.uk

This is display.cgi (source). It takes some text you enter into a form, and displays it for you as HTML. This is a great way to see how some HTML code looks in your (or someone else's) browser. So paste 'n go: