Using a Keyword Density Tool
The Keyword Density Tool from Developer Shed is a free tool that can be downloaded and embedded within a website. It is useful for SEOs and webmasters in optimizing keyword density on websites for chosen keywords.
Search engines use keyword density to categorize and determine the relevance of websites. The ideal keyword density will help to increase search engine rankings. This tool helps determine the balance necessary for SEO optimization. If the density it too low, the site will not reach optimum ranking; too high and the page could get flagged for keyword “spamming”.
By entering a URL, this tool will return a list of keyword density values for terms from one to three words. Like search engines, it filters out common stop words that are ignored, but does include stop words that occur in the middle of a term.