How to Use This Tool
Keyword density is a blunt instrument, and it is worth being honest about that before explaining how to use it. No search engine has a density target. There is no magic 2.5%. What density is genuinely useful for is diagnosis: it tells you what a page is visibly about, and it catches the two failure modes that still hurt rankings — a page that never quite states its own topic, and a page that states it so often it reads like spam.
Running an analysis
Paste the body copy of your page into the box. Do not include navigation, footer text or boilerplate; those inflate counts and are not what the page is competing on. Analysis runs as you type. Three controls change what you see:
- Exclude stop words removes roughly 180 function words — the, and, of, to, is, that. Leave this on. With stop words included, the top term on virtually every English page is "the", which tells you nothing.
- Merge simple plurals collapses regular plural forms into their singular, so converter and converters are counted together. Useful for seeing true topical weight, though it will occasionally merge two words you meant to keep apart.
- Minimum occurrences hides the long tail of terms that appear once. Two is a sensible floor; raise it on long documents.
Reading the three tabs
Single words tell you the subject. Two and three-word phrases tell you the intent, and they are usually more revealing. A page about currency conversion whose top bigram is "exchange rate" is positioned differently from one whose top bigram is "transaction fee", even though both share the same single-word profile. If the phrase you actually want to rank for is not in the top ten of the bigram or trigram list, the page is not really about it yet, whatever the title tag says.
The prominence column
Each row shows where in the document the term first appears, expressed as a percentage of the way through. A keyword that first shows up 70% down the page is doing far less work than one that appears in the opening sentence. Front-loading a term is a legitimate, non-spammy optimisation: it helps readers confirm they are in the right place, which is most of what search engines are trying to approximate anyway.
What to do with the warning
If any single term exceeds roughly 5% of counted words, the panel flags it. That threshold is not a penalty line, it is a readability line. Text that repetitive reads badly to humans, and in modern search that is the thing that actually costs you. The fix is never to delete instances mechanically — it is to replace some of them with the synonyms and related entities a knowledgeable writer would have used anyway.