Computer Forums - migrate to XHTML

I'm not sure but I think I want to try to migrate to XHTML 2.0. Does anyone know of any analytical tools that look at your existing HTML code and tell you what is not compliant with that standard, making specific recommendations on how to make it compliant?
Given how much content I have to update, doing this by hand is out of the question. I need to write a program to parse my files and generate new copies for me.:D:mad:
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