Free SEO writing tool
Keyword Density Checker
Last reviewed May 21, 2026
Analyze 1-word, 2-word, and 3-word phrase frequency, target keyword usage, over-optimization risk, and semantic coverage before publishing.
Publishing workflow
Use keyword density after the text is readable
A high-density page can still fail if it is hard to read or full of typos. This workflow keeps the SEO pass useful without turning the copy into keyword stuffing.
Draft clarity
Run grammar and spelling first so keyword repetition is not hiding basic writing problems.
Check grammarSearch coverage
Use 1-word, 2-word, and 3-word phrases to spot missing subtopics and accidental stuffing.
Check densityReader fit
Confirm sentence length and grade level before publishing a page that needs organic clicks.
Check readabilityWhat Is Keyword Density?
Keyword density is the percentage of times a keyword appears on a page compared to the total number of words. It is calculated by dividing the number of keyword occurrences by the total word count and multiplying by 100. For example, if a keyword appears 5 times in a 500-word article, the keyword density is 1%.
Why N-Grams Matter for SEO
N-grams (multi-word phrases) are crucial for SEO because search engines understand context through phrase matching. Analyzing 2-word and 3-word phrases reveals long-tail keyword opportunities and helps ensure your content naturally includes relevant phrases that users search for.
Keyword Density Best Practices
Focus on writing naturally rather than hitting exact density numbers. Use your primary keyword in the title, first paragraph, headings, and conclusion. Include synonyms and related terms (LSI keywords) to help search engines understand your topic without keyword stuffing. Modern SEO values semantic relevance over exact keyword matching.
Keyword Stuffing vs. Helpful Coverage
Search engines do not reward pages for repeating one phrase as many times as possible. Use this checker to spot obvious repetition, then improve the page with clearer answers, related subtopics, original examples, and terms that real users expect to see. If a keyword appears too often, replace some exact-match uses with natural synonyms or remove the repeated sentence.
For official guidance, review Google Search Central's documentation on keyword stuffing and creating helpful content.