Keyword Density Checker — Free SEO Tool
Analyze keyword frequency in your content
Keyword Density Guide
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Frequently Asked Questions
Q. What is the ideal keyword density?
Google recommends 1–3% keyword density. Exceeding 3% can be flagged as keyword stuffing, risking a ranking penalty. Use this tool to check before publishing.
Q. Is low keyword density bad for SEO?
Below 1% may cause Google to see weak relevance between the keyword and the page. Place keywords naturally in the body, subheadings, and first paragraph.
Q. Does the tool analyze synonyms or LSI keywords?
This tool analyzes the exact keyword or phrase you enter. For synonym and LSI analysis, use dedicated SEO platforms like Ahrefs or Semrush.
Q. What happens if keyword density is too high?
Exceeding 3% signals keyword stuffing to Google, which can drop your ranking. A density of 1–2% is ideal.
Q. Should LSI keywords be included in density?
LSI (Latent Semantic Indexing) keywords are counted separately. Distribute your main keyword and related terms naturally throughout the content for best SEO results.
Q. Does the tool measure title and body density separately?
The tool calculates density based on the full input text. SEO best practice is one keyword in H1, one to two in H2 subheadings, and natural placement in the body.
How to Use
Paste the full blog post you want to analyze into the text field.
Type the focus keyword (or phrase) you want to measure. Multi-word phrases like "SEO strategy" are supported.
See how many times the keyword appears and its percentage of total words. The 1–3% range is optimal.
If a warning shows density above 3%, replace some instances with synonyms or related terms.
Expert Knowledge: Keyword Density Analyzer
Keyword stuffing was a core SEO tactic before Google's Florida Update in 2003. Today, Google's BERT and MUM models understand context through natural language processing, so keyword repetition is treated as a spam signal rather than a relevance booster. As of 2024, Google doesn't publish an explicit keyword density threshold — it advocates natural language use.
TF-IDF (Term Frequency-Inverse Document Frequency) and LSI (Latent Semantic Indexing) keywords are now the backbone of modern SEO. TF-IDF measures how important a word is relative to other documents in the corpus — tools like Ahrefs and Surfer SEO use this. LSI keywords are semantically related words; pairing "diet" with "calories," "meal plan," and "exercise" strengthens topical relevance signals.
Keyword placement strategy matters as much as density. Google assigns higher weight to keywords appearing early in a document (first 100–150 characters). The ideal pattern is: one instance in H1, one in the opening paragraph, one to two in H2 subheadings, and one in the closing paragraph. Using synonyms and related terms throughout keeps writing natural while achieving SEO goals simultaneously.
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