Free Keyword Density Checker — Analyze Your Content

Keyword density is the percentage of times a specific keyword appears in your content relative to the total word count. It's calculated as: (number of times keyword appears ÷ total words) × 100. For example, if your keyword appears 10 times in a 500-word article, the keyword density is 2%.

Most SEO experts recommend a keyword density between 0.5% and 2% for your primary keyword. Going above 3% risks being flagged as keyword stuffing by Google, which can hurt rankings. Focus on writing naturally — if your content covers a topic well, keywords will appear at the right frequency on their own.

Keyword stuffing is the practice of overloading content with keywords in an unnatural way to manipulate search rankings. Google's algorithm can detect this and will penalize pages that do it. Signs include: repeating the same keyword every few sentences, using keywords in ways that don't fit naturally, and having keyword density above 3–4%.

AI models like ChatGPT and Gemini don't simply count keyword occurrences — they understand semantic meaning and context. However, using your target keyword naturally and consistently still helps AI models understand what your content is about. More important for AI search: comprehensive coverage of the topic, clear structure, and authoritative sources.

Stop words are common words that search engines traditionally ignore when indexing content, such as 'the', 'and', 'is', 'in', 'of'. They have no SEO value on their own. This tool filters them out by default so you can focus on meaningful keywords. Toggle the 'Show stop words' option to include them in the analysis.

Content length depends on the topic and competition. For most informational keywords, 1,500–2,500 words performs well in Google. For competitive topics, 3,000+ words may be needed. For AI search, comprehensive content that fully answers a question tends to get cited more — regardless of exact word count.