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Readability checker
Estimate English readability using sentence length and an approximate syllable count. Scores do not measure accuracy, comprehension, SEO quality or AI citations.
English formulas only. This tool does not identify the language of Latin-script text; names, abbreviations and accented words can distort estimates.
Quick answer
What does a readability checker estimate?
This tool estimates English Flesch Reading Ease and Flesch–Kincaid grade level using counted words, estimated sentences and a rule-based syllable count. It does not test reader comprehension, factual accuracy, search performance or AI citations.
Use the estimate as a review signal
The formulas reward shorter sentences and fewer syllables per word. A lower grade estimate does not prove that a reader understands the ideas. Keep necessary terminology and test important copy with its intended audience.
The displayed ease score is clamped to 0–100 and grade level to zero or above. Those display limits are not the full mathematical range of the formulas.
English language limitations
Text containing non-Latin scripts receives no score. Latin-script text is not automatically English; this tool does not identify its language. Accented words, names, abbreviations and sentence punctuation can distort the estimate.
A formula cannot determine whether an explanation is useful or whether a specialist audience needs technical detail. Avoid rewriting solely to hit a number.
Review clarity in context
- Make the purpose of each paragraph clear.
- Split a sentence when doing so makes its meaning easier to follow.
- Keep precise technical terms and explain unfamiliar ones.
- Check headings, examples and logical sequence with readers.
Where this data comes from
The browser counts ASCII letter tokens and terminal sentence punctuation, assuming one sentence if punctuation is absent. A vowel-group heuristic estimates English syllables. Reading Ease uses 206.835 − 1.015 × words/sentences − 84.6 × syllables/words. Grade Level uses 0.39 × words/sentences + 11.8 × syllables/words − 15.59. These estimates can differ across implementations. No text-analysis API is called by this calculation.
Frequently asked questions
What is a good reading grade level?
There is no universal target for every audience or task. Review whether the intended reader understands the text; a formula estimate cannot establish that.
Does this score predict Google rankings?
No. This tool does not measure ranking systems or search performance. Clarity deserves review for readers, without promising a ranking benefit.
How is reading ease calculated?
It combines average counted sentence length and estimated syllables per word. The tool clamps the displayed result to 0–100; higher values describe easier wording under this heuristic, not measured comprehension.
Why does the score differ from another tool?
Tokenization, sentence detection and syllable heuristics can differ. This tool has no validated cross-tool error bound. Compare the same implementation and review the underlying text.
Should I remove technical words to lower the grade?
Keep terms that carry necessary meaning. Explain them and improve the surrounding sentences rather than making the text less precise.
Does readability measure AI citation readiness?
No. The formulas do not observe citations or test answer-engine retrieval. A clearer explanation may help readers, but this score does not prove a citation outcome.
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