Free Online HTML/CSS Validation Tool

I have to confess I’m not a developer. I don’t have solid knowledge of HTML, CSS coding or database configuring. But I want makebadge.com to be fast to load, easy to navigate, and error-free. I think I won’t make a discovery if I say that my wish list is typical for all website owners and webmasters.

To optimize my website performance, I tried various online HTML validation tools such as Firefox plugins, Chrome extensions, and free Google page speed. In my opinion, the best page code validation tool is WebPagetest.
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