Word-, sentence-, and syllable-based metrics form the backbone of modern readability analysis. They help you quantify lexical variety, sentence complexity, and overall text density, enabling objective comparisons between drafts or against style guides.
This tool accepts pasted passages or locally uploaded plain-text files, then instantly calculates counts, lexical density, and two readability indices. A reactive engine updates statistics, frequency tables, and an interactive bar chart as you type or tweak the display parameters.
Marketers, teachers, and editors rely on such dashboards to target age-appropriate language, trim redundancy, and uncover over-used words; *avoid pasting confidential material unless essential*.
Readability scoring couples average sentence length (ASL) and average syllables per word (ASW) to gauge comprehension effort. Higher ASL and ASW inflate cognitive load; lower values promote clarity. The tool additionally computes lexical density—the ratio of unique words to total words—to reveal vocabulary diversity.
Flesch Reading Ease (FRE) and Flesch-Kincaid Grade (FKG) are calculated as:
FRE Score | Difficulty |
---|---|
90–100 | Very Easy |
80–89 | Easy |
70–79 | Fairly Easy |
60–69 | Standard |
50–59 | Fairly Difficult |
30–49 | Difficult |
0–29 | Very Confusing |
Scores above 60 suggest material suited to a broad audience; values below 50 often require specialist knowledge or editorial simplification.
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– number of high-frequency words displayed and charted.Sample of 95 words across 5 sentences with 143 syllables:
Formulas stem from Rudolf Flesch’s readability research and the U.S. Navy training manual (1975). Subsequent validation appears in Applied Linguistics and Journal of Technical Writing studies.
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Follow these steps to obtain instant insights:
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as needed.No, all processing occurs locally; nothing is transmitted.
Definitions of word and sentence boundaries vary; this tool follows strict regex rules, so totals may shift slightly.
It is the percentage of unique tokens, indicating vocabulary variety within a passage.
Heuristics handle common patterns, but rare or loanwords can introduce ±5 % error.
You can, yet readability formulas are calibrated for English and may misrepresent complexity in other languages.