Analyze keyword density for any text. Find 1-word, 2-word, and 3-word phrase frequency and density to optimize on-page SEO.
Keyword Density Checker
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Keyword Density Analysis for On-Page SEO
Keyword density is the percentage of times a keyword appears in your content relative to total word count. Analyzing density helps you ensure your primary and secondary keywords appear with appropriate frequency — enough for relevance without over-optimization.
How to Read the Density Report
1-word keywords: Shows frequency of individual words (excluding common stop words like "the", "and")
2-word phrases (bigrams): Two-word combinations — often your core keyword phrases
Primary keyword: 1–2% density — for a 1,000-word article, 10–20 occurrences
Secondary keywords: 0.5–1% — 5–10 occurrences per 1,000 words
Over 3% density: Risk of keyword stuffing — may trigger Google's spam filters
LSI Keywords (Latent Semantic Indexing)
Modern SEO goes beyond simple keyword density. Google understands semantics — words related to your topic. For a post about "running shoes", Google expects to see "marathon", "trail", "cushioning", "Brooks", "Nike" etc. Analyze phrase density to ensure semantic richness across your content.
Frequently Asked Questions
Keyword stuffing is repeating keywords unnaturally to manipulate search rankings — e.g. 'buy blue shoes, best blue shoes, cheap blue shoes' in every sentence. Google penalizes this. Avoid it by: writing for humans first, using synonyms and variations, integrating keywords into naturally flowing sentences, and keeping density under 2%. Your content should read well aloud — if it sounds repetitive, rewrite it.
Start with your topic and brainstorm what terms your audience would search. Use free tools: Google Search Console (what queries already bring traffic), Google Autocomplete (type in the search bar and note suggestions), People Also Ask boxes in search results, and Answer the Public. For paid research: Ahrefs, Semrush, or Moz. Focus on keywords with decent search volume and manageable competition.
No — distribute keywords naturally throughout the article. Include your primary keyword in: the page title, the H1 heading, the first 100 words of the introduction, at least one H2 subheading, the meta description, and the conclusion. Then let it appear naturally in the body without forcing it. Strategic placement matters more than hitting a specific density number.
Long-tail keywords (2–4 words) are easier to rank for than single-word keywords because they're more specific and have less competition. 'Shoes' is extremely competitive. 'Running shoes for flat feet' has much lower competition and higher purchase intent. Long-tail keywords individually have lower search volume, but collectively can drive more traffic than highly competitive short keywords.