Keyword Density Checker Online

Analyze keyword frequency and density in your text

Paste any text above to analyze keyword frequency and density

Works for blog posts, articles, AI-generated content, landing pages, and more

About this tool

Keyword Density Checker Online is a free browser-based tool that analyzes your text and shows the frequency and density percentage of every word, phrase (bigram), and three-word phrase (trigram). It is designed for SEO content audits, checking AI-generated articles for keyword stuffing, and ensuring your content focuses on the right topics.

Paste any text and instantly see a ranked list of your most-used keywords with their count and density percentage. Toggle between single keywords, two-word phrases, and three-word phrases. Filter out common stop words like “the”, “and”, “is” to focus on meaningful content words. Color-coded density bars make it easy to spot over-optimized keywords (above 3–5%) at a glance.

All analysis runs locally in your browser — your text is never uploaded to any server.

Common use cases

  • Audit blog posts and articles for keyword stuffing before publishing.
  • Check that AI-generated content focuses on your target keywords.
  • Find the most-used phrases in a competitor's article by pasting it in.
  • Verify keyword distribution across a long-form piece of content.
  • Identify topic drift in AI-generated text by checking keyword focus.
  • Optimize landing page copy by checking keyword density.
  • Review product descriptions for repeated words or phrases.
  • Analyze transcripts, speeches, or interview text for key themes.
  • Export keyword frequency data as CSV for further analysis.

Frequently Asked Questions

What is keyword density?

Keyword density is the percentage of times a keyword or phrase appears relative to the total word count. A density of 1–2% is generally considered natural. Above 3–5% may be flagged as keyword stuffing by search engines.

What are stop words?

Stop words are common words like “the”, “and”, “is”, “in” that carry little SEO meaning. Filtering them out lets you focus on the meaningful content words in your text.

What are bigrams and trigrams?

Bigrams are two-word phrases (e.g. "keyword density"). Trigrams are three-word phrases (e.g. "keyword density checker"). Analyzing these helps you understand how phrases — not just individual words — are distributed in your content.

What density percentage is ideal for SEO?

There is no universal ideal, but most SEO practitioners aim for 1–2% for primary keywords. Above 3% risks over-optimization penalties. Below 0.5% may indicate the keyword is underrepresented.

Is my text sent to a server?

No. All analysis runs locally in your browser using JavaScript. Nothing is uploaded or stored.

Can I export the results?

Yes. Click the CSV export button to copy all keyword data (phrase, count, density) in CSV format, which you can paste into Excel or Google Sheets.

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