Keyword density checker

What keyword density actually means

Keyword density is the percentage of total words on a page that match a specific keyword or phrase. If a 1,000-word article uses the phrase “ai search visibility” eight times, the density of that phrase is 0.8%.

It's not a Google ranking factor in any direct sense anymore — Google's NLP figured out semantic relevance a decade ago. But the number is still useful as a writing diagnostic: if your primary keyword shows up at 5% density, you're probably stuffing. If a competitor ranks above you and their phrase frequency table is full of modifiers you forgot to include, that's a content gap to fix.

How to actually use this output

1. Check your primary keyword. Healthy single-word density is 1-2% for your main term. Anything over 3% reads unnaturally; over 4% the tool flags it explicitly.
2. Look at the 2-gram and 3-gram tables. These are the phrases real searchers type. If your article covers a topic but never uses the natural 2/3-word phrases for it, you're leaving relevance on the table.
3. Compare to a top-ranking competitor. Paste their article in too. The phrases they use that you don't are content opportunities — not for keyword stuffing, but for genuine missing topics.
4. Watch for accidental spam patterns. Repetitive 2-grams like “click here” or “buy now” stacking up in the table is a sign the article is template-y and conversion-y rather than substantive.

Why we filter stop-words for the 1-gram table

Without filtering, the top 5 single words on every English article on the planet are the same: “the, of, and, to, a”. Useless. The 1-gram table drops them so the most common content word floats to the top. The 2-gram and 3-gram tables keep stop-words because real phrases like “how to write” or “the best AI” need them to make sense.

FAQ