Keyword Density Checker

Optimize your content relevance by analyzing keyword frequency.

What This Tool Does

The Keyword Density Checker analyzes the frequency and distribution of words and phrases in your content. It calculates density percentages for single words (unigrams), two-word phrases (bigrams), and three-word phrases (trigrams). You can paste text directly or fetch content from a live URL.

Inputs

  • URL fetch: Enter any webpage URL to extract and analyze its text content.
  • Text input: Paste or type content directly into the textarea for analysis.

How It Works

The tool processes your text by removing common stop words, then counts the occurrences of each unigram, bigram, and trigram. It calculates the percentage each term represents relative to the total word count and ranks results by frequency. When fetching from a URL, the tool strips HTML tags and scripts to analyze only visible text content.

Understanding the Results

  • Word count: Total number of words in the analyzed text.
  • Density tables: Ranked lists of unigrams, bigrams, and trigrams with their occurrence count and percentage of total words.
  • Color coding: Terms with higher density are highlighted to make the most-used phrases easy to identify at a glance.
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Total Words
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Top Keyword

Single Keywords (1-gram)

Word Count Density

2-Word Phrases (2-gram)

Phrase Count Density

3-Word Phrases (3-gram)

Phrase Count Density

Step-by-Step Example

  1. Paste a blog post draft into the text area or enter the URL of a published article.
  2. Click Analyze to process the content.
  3. Review the unigram table. Check if your target keyword appears in the top results.
  4. Check the bigram and trigram tables for your target long-tail phrases.
  5. If your primary keyword density is below 1 percent, consider adding more natural mentions.
  6. If density exceeds 3 percent, reduce usage to avoid keyword stuffing.

Use Cases

  • Pre-publication content audits to ensure target keywords are present without over-optimization.
  • Competitive analysis by fetching and comparing keyword distribution on competitor pages.
  • Identifying unintended keyword repetition that could trigger spam filters.
  • Discovering which phrases your content emphasizes most for topic alignment checks.
  • Supporting content briefs by comparing actual density against planned targets.

Limitations and Notes

  • Stop words such as "the," "and," and "is" are excluded from analysis to focus on meaningful terms.
  • Keyword density alone does not determine rankings. Search engines use hundreds of signals including relevance, authority, and user experience.
  • URL fetching only captures visible text. Content rendered by JavaScript may not be included.
  • The tool does not assess keyword placement, such as whether keywords appear in headings, the first paragraph, or anchor text.

Frequently Asked Questions

What is keyword density?

Keyword density is the percentage of times a keyword or phrase appears on a page compared to the total word count. For example, if a 500-word article uses a keyword 10 times, the keyword density is 2 percent.

What is a good keyword density percentage?

There is no fixed ideal percentage. Generally, a density between 1 and 3 percent is considered natural. More important than hitting a specific number is ensuring the keyword appears naturally and the content reads well for humans.

What are n-grams in keyword analysis?

N-grams are contiguous sequences of n words from a text. Unigrams are single words, bigrams are two-word phrases, and trigrams are three-word phrases. Analyzing n-grams helps identify commonly repeated phrases and topic patterns.

Can high keyword density hurt my rankings?

Yes. Unnaturally high keyword density, known as keyword stuffing, can trigger search engine spam filters and lead to ranking penalties. Focus on writing naturally and covering the topic thoroughly.

Does this tool analyze text from any URL?

Yes. You can enter a URL to fetch and analyze the visible text content from that page. The tool strips HTML tags and analyzes only the text content. Pages behind logins or blocked by robots directives cannot be fetched.

Should I optimize for single keywords or phrases?

Both matter. Single keywords establish broad topic relevance, while two-word and three-word phrases capture long-tail search queries. Use the n-gram analysis to identify which phrases appear most frequently in your content.

Sources and References

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How to use Keyword Density correctly

Keyword density is no longer a primary ranking factor, but it helps ensure your content stays on topic. Aim for natural language.

What is the ideal density?

There is no magic number. Most SEOs recommend 1-2% for your primary keyword. Anything above 3% might look spammy (keyword stuffing).

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