Keyword Density Checker

A keyword density checker measures how often each word and phrase appears in a piece of text, then expresses that frequency as a percentage of the total word count. This free tool reads any text you paste, counts single words and common 2-3 word phrases (n-grams), and ranks them from most to least frequent so you can see at a glance which terms dominate your content. Density is calculated with a simple, transparent formula: the number of times a term appears divided by the total number of words, multiplied by 100. A word that shows up 8 times in a 400-word article has a density of 2 percent. By default the tool filters out English stop words like the, and, of, and to, because those function words always top the raw count and tell you nothing about your topic. The result is a list focused on the meaningful terms a search engine might associate with the page. There is no magic ideal density. Modern search engines reward natural, helpful writing and penalize keyword stuffing, so the practical use of this tool is to confirm your target phrase appears often enough to be relevant without being repeated unnaturally. If a single keyword spikes well above the others, that is usually a signal to vary your wording or add synonyms. Writers also use it to catch crutch words and unintended repetition in essays, emails, and product copy. Everything runs locally in your browser, so even unpublished drafts and client content never leave your device, and there is no length limit beyond what your device can hold in memory.