Paste any text to see how many words are unique, how diverse your vocabulary is, and exactly which words only appear once.
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See how repetitive or varied your word choice really is, in one clean view.
Total words, unique words and lexical diversity update live as you type or paste.
A simple bar shows where your text falls, from low to very high vocabulary diversity.
List every word used exactly once to find standout or possibly misused terms.
Lexical diversity measures how much variety exists in a text's word choice, calculated as the number of unique words divided by the total number of words, expressed as a percentage. A short, careful poem might reuse very few words twice, giving it a high diversity score, while a long transcript of casual speech will naturally repeat common words like "the," "and" and "so" constantly, pulling the score down. This is why diversity scores are most meaningful when comparing texts of similar length, since longer texts mathematically tend toward lower ratios even when written well, a pattern linguists call the type-token ratio's length dependency. Hapax legomena, words that appear exactly once, are a related and genuinely useful signal: a high proportion of them often points to a rich, varied vocabulary or specialized terminology, while editors also use them to spot one-off typos, unusual word choices, or terms worth double-checking. Together, these numbers give you a quick, objective read on writing style that would otherwise require a careful manual read-through.
Compare diversity between texts of similar length for a fair reading, not a 200-word note against a 5,000-word essay.
Technical or instructional writing often repeats key terms on purpose for clarity, which lowers diversity without being a flaw.
Scan one-time words for typos, inconsistent terminology, or genuinely distinctive vocabulary worth keeping.
Lexical diversity is the ratio of unique words to total words in a text, shown as a percentage. A higher percentage means less word repetition and a broader vocabulary.
A hapax legomenon is a word that appears exactly once in a given text. Linguists use these words to study an author's vocabulary and writing style.
Longer texts naturally reuse common words like the and and far more often, so the ratio of unique to total words tends to fall even in well-written text.
No. Words are compared without regard to capitalization, so Fox and fox at the start of a sentence are counted as the same word.
Yes. It is free to use with no account, and all analysis happens locally in your browser without uploading your text.
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