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Unique Words Counter

Count total vs unique words and measure lexical diversity.

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What is a unique words counter?

Run 1,000 words through this counter and you might find only 380 distinct ones, a lexical diversity of 38%. The tool reports total words, unique words, repeated words and that diversity percentage. Comparison ignores case, so “The” and “the” merge into one entry. Novelists tend to score higher than technical writers, who reuse fixed terminology on purpose.

How to use the Unique Words Counter

  1. 1 Paste in the writing sample under review.
  2. 2 Compare the unique-word figure against the total word count.
  3. 3 Check the diversity percentage; higher means more varied vocabulary.
  4. 4 Save the numbers with the copy button to track drafts over time.

What you can use it for

  • Improving vocabulary variety in an essay.
  • Spotting a narrow word palette in marketing copy.
  • Measuring richness of language in a writing sample.
  • Comparing the diversity of two drafts.

Frequently asked questions

How is a unique word decided?
Words are lower-cased before comparison, so capitalisation never creates a duplicate. Each distinct spelling counts once regardless of how many times it appears in the text.
What counts as good lexical diversity?
It depends on length: short texts naturally score higher because words haven’t had time to repeat. Comparing two drafts of similar length is more meaningful than chasing an absolute number.
Does it list which words repeat?
No, it reports totals only. Pair it with the word frequency counter for a ranked list, or the duplicate word finder to see just the offenders.

Related tools

Word Frequency Counter List every word and how often it appears, most frequent first. Duplicate Word Finder Find words that repeat and see how many times each one occurs. Word Counter Live counts of words, characters, sentences, lines and paragraphs as you type.

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