Enter a URL
The density of a keyword refers to the number of times that keyword appears on a page.
This keyword density free tool, will helps you to determine if the targeted keywords are present enough on the pages of your articles.
The keyword density index corresponds to the number of occurrences of a keyword reduced to the total number of words on the page.
Generally, a density ratio between 2% and 6% is good for SEO.
Notice by the way, that the positions of the targeted keywords in your article, are also important. Hence, your targeted keywords should be present at the start of your post, in the headings and in also in derived forms and in a natural way.