What keyword density tells you
Word frequency analysis counts how often each word or phrase appears in a text and expresses it as a percentage of the total. It is used by writers checking for unintentional repetition, by editors assessing style, and by anyone auditing page copy for search relevance.
The SEO context, honestly stated
Keyword density was once treated as a direct ranking factor, and a small industry grew around hitting a supposed optimal percentage. That is no longer how search engines work. Modern ranking systems evaluate meaning, context and topical coverage rather than counting instances of a phrase, and deliberately engineering a density figure achieves nothing.
The analysis remains useful for a different reason: it shows you what your page is actually about. If you have written a page intended to cover one topic and the most frequent meaningful terms are something else entirely, that is worth knowing. Equally, if your target phrase appears once in two thousand words, the page may genuinely be about something adjacent rather than what you intended.
The other genuine use is catching over-optimisation. A term appearing at five or six percent almost always reads badly to a human, and unnaturally repetitive copy can attract a spam penalty. Density analysis makes that visible.
Stop words
Common function words — "the", "of", "and", "is" — dominate any word count and tell you nothing. Filtering them is on by default so the results reflect meaningful vocabulary. Turn the filter off if you are analysing writing style, where function word patterns are genuinely informative and are used in authorship attribution research.
Phrases
Single-word counts are limited, because most real search intent is expressed in phrases. Switching to two or three word groupings often reveals patterns invisible at the single-word level, and gives a much better picture of what a page actually covers.
Writing and editing uses
Beyond search, frequency analysis catches habits writers cannot see in their own work: a favourite adjective used eleven times, a transitional phrase opening five consecutive paragraphs, a hedging word scattered throughout. Reading the top of the frequency list is a fast way to spot repetition that will irritate a reader.
Analysed locally
Your text is processed in your browser and never transmitted, so unpublished drafts and client copy stay private.
Frequently Asked Questions
What is a good keyword density?
There is no target worth chasing. Search engines no longer reward a specific percentage. Write naturally and use the analysis to check the page is about what you intended.
Why are common words excluded?
Words like "the" and "of" dominate any count without conveying meaning. You can turn the filter off if you are analysing writing style.
Should I analyse phrases or single words?
Phrases are usually more informative, since real search intent is expressed in multi-word terms rather than isolated words.
Can high density hurt my ranking?
Unnaturally repetitive copy reads badly and can be treated as spam. If a term is above about three percent, the writing is probably suffering.
Is my text uploaded?
No. Analysis runs entirely in your browser.