Paste your content and get a full breakdown of keyword frequency, density percentages, and stuffing warnings — all in your browser.
Analyze Content →Paste your content below, optionally exclude words, then click Analyze.
| # | Keyword | Count | Density | Visual |
|---|
Keyword density is the percentage of times a specific keyword or phrase appears in a piece of content relative to the total word count. It is a basic SEO metric used to gauge how relevant a piece of content is to a given search term.
The formula is straightforward: (Number of keyword occurrences ÷ Total words) × 100 = Density %. For example, if the word "SEO" appears 12 times in a 600-word article, its keyword density is 2%.
While modern search engines like Google no longer rely on keyword density as a primary ranking factor, maintaining a natural, readable distribution of keywords remains important for both search relevance signals and user experience.
Follow these five steps to analyze your content's keyword distribution in seconds:
There is no single universally agreed-upon number, but SEO practitioners and content strategists generally converge on the following ranges:
| Density Range | Status | What It Means |
|---|---|---|
| 0.5% – 1% | ✅ Low | Natural usage; keyword may not appear prominent enough for some competitive terms. |
| 1% – 3% | ✅ Optimal | The sweet spot — keyword appears enough to signal relevance without feeling forced. |
| 3% – 5% | ⚠️ Elevated | Borderline; review context and readability. May be fine for very long documents. |
| 5%+ | 🔴 Stuffing | Triggers keyword stuffing penalties from search engines. Reduce immediately. |
Ultimately, write for humans first. If your content reads naturally and covers a topic comprehensively, keyword density usually takes care of itself.
Keyword stuffing is the practice of overloading a page with keywords in an unnatural way to manipulate search rankings. Google's guidelines explicitly penalize this behavior. Warning signs include:
While Google has moved far beyond simple keyword counting, keyword density still plays an indirect role in content quality signals:
No. KeyDensity Pro runs entirely in your browser using vanilla JavaScript. Your text never leaves your device — there are no servers, no databases, and no analytics tracking your content.
Stop words are common English words like "the," "and," "is," "in," "a," "to," and "of" that appear in almost every piece of text and carry little SEO signal. This tool filters over 150 common English stop words by default so your results focus on meaningful keywords.
The tool uses a sliding window approach: for 2-word phrases (bigrams) it pairs each word with the next, and for 3-word phrases (trigrams) it groups three consecutive words. Stop words are removed from the text before building n-grams, so every phrase shown in those tabs consists of meaningful content words only.
Each keyword's density is calculated independently as its own share of the total word count, not as a share of all keyword occurrences. This means the densities are not mutually exclusive percentages — they tell you what proportion of the whole text each term occupies.
Keyword density percentages become more meaningful at 300+ words. Very short texts (under 100 words) can produce misleading results because a single extra use of a word can shift density by several percentage points. For best results, analyze content that is at least the length of a typical blog post (500–1500 words).