Free SEO Tool

Keyword Density Checker

Check how often a keyword appears in your content and whether you are in a healthy range or heading toward over-optimisation.

100% Free No Sign-up Instant Results
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Paste content and click Analyze

Top Keywords by Frequency

What Is This Tool?

What Is Keyword Density?

Keyword density is the percentage of times a target keyword appears relative to total word count: (occurrences ÷ total words) × 100. If "AI content generator" appears 5 times in a 500-word article, the density is 1.0%. The healthy range for most topics is 0.5%-2.5%. Above 3.5%, content starts to read as stuffed.

Keyword density is not a direct Google ranking signal, but it is a useful sanity check. More important is semantic coverage: covering the topic with related terms and natural phrasing, rather than repeating one phrase mechanically.

  • Healthy density range: 0.5%-2.5%
  • Above 3.5% risks a keyword stuffing penalty from Google
  • Long-tail phrases naturally appear at lower densities (0.3%-1.0%), which is fine
  • The frequency table helps you spot unintended repetition of words you did not target

How to Use

How to Use the Keyword Density Checker

  1. 1
    Paste Your Content

    Copy and paste your full article or page copy. The tool works best with 200 or more words.

  2. 2
    Enter Your Focus Keyword

    Type your primary keyword or phrase. The tool counts exact matches and calculates the density percentage.

  3. 3
    Review the Results

    See total word count, keyword hit count, density percentage, and a top-15 frequency table with stopwords excluded.

Learn More

Keyword Density: What Matters and What Does Not

What keyword stuffing actually looks like

Stuffing means forcing a keyword into content at an unnatural rate: repeating it in every other sentence, hiding it in white-on-white text, or cramming it into footers and alt tags. Google's Penguin update (2012) and subsequent core updates penalise this. Pages caught stuffing lose rankings or get removed from the index.

When density analysis is useful

Raw density is most useful for catching mistakes: a writer who typed "AI writing tool" 20 times without realising, or a page that somehow never mentions the topic it is supposed to cover. It is less useful as a target. Write naturally, then use this tool to check, not to hit a number.

Semantic coverage matters more

Google's algorithms understand topics, not just exact keyword matches. A page about "AI blog generator" that also naturally covers "content automation", "writing assistant", and "SEO content tool" will outperform one that repeats "AI blog generator" at 2.1% density with nothing else of substance. Use the frequency table to check your topic breadth, not just your target keyword count.

FAQs

Keyword Density FAQs

What keyword density is ideal for SEO?
0.5%-2.5% is a reasonable target. Below 0.5% the page may lack relevance signals for that term; above 3.5% it starts looking like keyword stuffing.
Does Google penalise high keyword density?
Google does not use density as a direct penalty trigger, but it does detect unnatural repetition and will demote or remove pages that look stuffed.
Why are stopwords excluded?
Words like "the", "a", and "in" appear in everything and carry no SEO value. Excluding them keeps the frequency table focused on words that actually matter for topic relevance.
Can this help with AI search?
Indirectly. The frequency table shows whether your content covers the sub-terms and related phrases for a topic, which matters for AI engine citations as much as for Google rankings.

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