webspider and syntax checker
 

Found this handy tool.

This freeware version will provide you with some basic checking on your meta tags. You will learn if your tags are too big, or you repeat them too many times, it even contains error checking for some of the more common errors.

http://www.northernwebs.com/set/setsimjr.html#caveats

At the bottom of the page you can enter your URL