Best Online Credit Check

I want to find out my credit rating so I can see what my chances are of getting a mortgage but I heard from a mortgage broker that it will damage my credit rating because every time you do a check it registers as a mortgage application, is that true ? Does it really reduce your score ?

if you are looking for the free credit check usa national site, check out this site

http://free-credit-check-national.com/

Here you can check your 3-in-1 Report from all three credit reporting agencies and your credit score rating.