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Keyword Density Analyzer

Text

Count keyword and phrase frequency and density across a block of text, the way an SEO keyword-density checker does

Paste in an article, page copy, or content draft and see which words and phrases actually dominate it, with a count and a density percentage (occurrences per 100 words) for each. Single-word mode filters out common English stopwords so the results surface real topical keywords instead of a list of "the" and "and", while switching to 2- or 3-word phrase mode keeps stopwords in place since phrases like "end of the day" or "return on investment" legitimately contain them. It is a distinct signal from the site's Keyword Extractor, which pulls out candidate keywords using TF-IDF scoring rather than reporting raw frequency and density. Everything runs in your browser with no external calls.

seokeyword-densityword-frequencywritingcontent

How to use Keyword Density Analyzer

  • 1.Paste the text you want to analyze, or load one of the built-in examples.
  • 2.Choose a phrase length: single words, 2-word phrases, or 3-word phrases.
  • 3.Review the table of keywords ranked by count, each with its density (occurrences per 100 words).

Frequently asked questions

How is density calculated?
Density is the number of times a keyword or phrase appears, divided by the total word count, expressed as a percentage. It is a simple frequency measure, not a weighted relevance score.
Why don't single words like "the" or "of" show up?
Single-word mode excludes a fixed list of common English stopwords, since a raw word-frequency count is dominated by them and isn't useful for spotting topical keywords.
Why do stopwords show up in 2- and 3-word phrases?
Useful multi-word phrases often legitimately contain a stopword ("return on investment", "end of the day"), so phrase mode only filters by minimum word length, not by the stopword list.
How is this different from the Keyword Extractor tool?
The Keyword Extractor scores and ranks candidate keywords using TF-IDF; this tool reports raw occurrence counts and density for exact words or phrases, which is what most SEO keyword-density checkers show.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/keyword-density-analyzer \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"text":"Machine learning models power machine learning systems everywhere today."}'

Get an API key from your dashboard · Full API docs →

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