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Keyword Density Checker — SEO Analyzer

Paste your text below to analyze keyword density and frequency. Find the top 20 keywords with density percentages. Toggle stop word filtering for better SEO insights. 100% free and private.

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How to Use the Keyword Density Checker

Paste your text into the input field and click "Analyze Keywords". The tool will count every word, calculate the frequency of each, and display the top 20 keywords with their density percentage. Toggle the stop words filter to focus on meaningful content words.

Why Keyword Density Matters for SEO

Search engines use keyword density to understand what a page is about. A density of 1-3% for your target keyword is generally recommended. Over-using keywords (keyword stuffing) can result in penalties. This tool helps you strike the right balance.

Understanding the Results

  • Total Words: The number of words in your text (after stop word filtering if enabled).
  • Unique Words: How many distinct words appear in the text.
  • Density: The percentage of times a word appears relative to total word count.
  • Visual Bars: Quickly see which keywords dominate your content.

Frequently Asked Questions

Keyword density is the percentage of times a keyword appears in a text compared to the total word count. For example, if a keyword appears 10 times in a 500-word article, the keyword density is 2%.
Most SEO experts recommend a keyword density of 1-3% for primary keywords. Going above 3-4% may be considered keyword stuffing by search engines, which can hurt your rankings.
Stop words are extremely common words like "the", "a", "is", "are", "and", "but", "in", "on", "at", "to", "for". They carry little meaning on their own and are often filtered out in keyword analysis to focus on more meaningful content words.
Include your target keyword in headings, the first paragraph, and throughout the body text. Use related keywords and synonyms. Write for humans first and search engines second. Avoid keyword stuffing.

Last updated: June 2026