How to check if my website is HTML tidy?

Chip D <[email protected]> Mon, 23 Sep 2013 14:10:09 +0300
Newsgroups gmane.comp.web.html-tidy.user
Message-ID <CA+Zo7NMq5pQYpuihvPFvW7yyCY2oN1f0Kv=N1aWwU6iFg9-Thg@mail.gmail.com>
Hello. I am wondering how to check if my website is HTML tidy.
My website is: http://templendo.com
Please advice.