Unique Word Counter Online Free — Check Vocabulary Size
Count unique words and see your vocabulary size.
Unique words (alphabetical):
What is Unique Word Counter?
Counts how many unique words appear in your text (case-insensitive). Shows total word count, unique word count, percentage of unique words, and lists all unique words alphabetically.
Common Use Cases
Measuring vocabulary richness in essays, analysing writing diversity, checking for over-repetition of words, and vocabulary building exercises.
How It Works
Tokenises text into words (stripping punctuation), converts to lowercase, and uses a Set to find unique values. Results update in real time.
Frequently Asked Questions
Is matching case-sensitive?
No. "Hello" and "hello" are counted as the same word.
Are punctuation marks counted as words?
No. Punctuation is stripped before counting.
What is a good vocabulary diversity score?
Higher percentage = more diverse vocabulary. 60%+ unique words is excellent. 40-50% is average.
How can I improve vocabulary diversity?
Use our "Duplicate Word Counter" to find overused words, then use a thesaurus to find synonyms.
Related Tools
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Duplicate Word Counter
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Vocabulary Richness Score
Measure vocabulary diversity using Type-Token Ratio (TTR).
Most Frequent Words
Find the most commonly used words in your text.