The Keyword Density Analyzer allows you to view a percentage breakdown of the words of any website
Keyword Density Analyzer
Keyword Density: Keep Your Web Site Well-Rounded
When search engines were in their infant stages, you could stuff a page full of the same keyword and rank well in the search engines for that keyword.
Although this worked in the past, today's search engines have evolved and become more sophisticated. Instead of focusing purely on keyword density, they look for other on-page factors like semantic linking.
Even though an extremely high keyword density will still help you rank well in certain search engines, it can actually have an adverse effect on your ranking in the major engines.
Instead of manually counting the words on your web pages, you can use the Keyword Density Analyzer to quickly receive a full breakdown of the keyword densities for every word on a specific page.
This tool shows the Keyword Density in each section of your page for the keyword you search for, along with the density of each word included in the body of the page more than once.