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Keyword Density Checker

Analyze your content and target keyword to instantly check density, usage count, and SEO safety.

Why Keyword Density Still Matters

While Google's algorithm has evolved far beyond exact-match keyword counting, TF-IDF (Term Frequency-Inverse Document Frequency) is still a foundational pillar of how search engines understand content.

If you write a 2,000-word article about "Email Marketing Software" but only use the phrase once, Google lacks the confidence to rank your page for that query.

The Danger of Keyword Stuffing

Conversely, if your density exceeds 2.5%, you trigger Google's spam filters. Keyword stuffing artificially inflates relevance at the expense of user experience. If your text reads unnaturally, users will bounce, signaling to Google that your page is low quality.

  • The Sweet Spot: Aim for a primary keyword density of 0.5% to 1.5%.
  • LSI Keywords: Use synonyms and Latent Semantic Indexing (LSI) terms to build topical authority without stuffing your main keyword.
  • Readability Check: After optimizing your density, run your text through our Readability Score Checker.

Your Final Pre-Publish Step

Hitting the perfect keyword density is just one piece of the puzzle. Before you hit publish, run through our comprehensive SEO checklist.

20-Point SEO Checklist →

External Resources

Learn more about keyword optimization and avoiding spam penalties.

Google: Keyword Stuffing Policies Wikipedia: Keyword Density

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About the Keyword Density Checker

This free keyword density checker breaks your text into single words and two- and three-word phrases, then reports how often each appears and what percentage of the total that represents. It helps you confirm your target keyword is present enough to signal relevance without tipping into keyword stuffing.

As a rule of thumb, keep your primary keyword around 0.5%–2% density and lean on natural variations and related terms for the rest. The tool highlights anything above ~3% so you can catch accidental over-optimization before you publish.

How to use it

  1. 1. Paste your draft article or page copy into the box.
  2. 2. Review the ranked list of single words and multi-word phrases.
  3. 3. Check your target keyword sits near 0.5%–2% density.
  4. 4. Trim any term flagged as over-optimized and add synonyms instead.

Frequently asked questions

What is a good keyword density?
There is no exact number Google publishes, but 0.5%–2% for your main keyword is a safe, natural range. Focus more on covering the topic thoroughly with related terms than on hitting a percentage.
Can keyword stuffing hurt rankings?
Yes. Unnaturally repeating a phrase can trigger spam signals and, more often, simply reads badly and hurts conversions. Anything consistently above 3% is worth reviewing.
Does this tool ignore common words?
It reports everything, but stop words like "the" and "and" naturally rise to the top and can be ignored — focus on your topical nouns and phrases.
Is the checker free and private?
Yes. It is free with no sign-up and your text is analysed locally in the browser.

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Looking for something else? Browse all free AI tools for bloggers or read the AiTooly blog.