The tool takes in whatever text input you have and performs operations on it. For example, paste in some HTML and hit the button to submit it and out the other side pops HTML formatted to echo in PHP (using print). There are other options on the tool - the ability to use printf and echo along with print, to add in newlines, and to add parenthesis (depending on your preference).
It's nothing overly impressive, but if you have a large block of HTML that you need to work with, you might check into it...
