HTML Validator

After I noticed a few web pages at Clickfire.com doing back flips, I began searching manually through the source to find the errors. After some frustration, I plugged the address of one of the problem pages into an HTML validator and soon found a few misplaced HTML tags that had crept into the code. Few web sites seem to have perfectly valid HTML code. I think that the most useful purpose of an HTML validator is not to make your HTML completely perfect, but to debug errors. This W3C HTML validator tool offers the fastest way to find errors in your HTML code.