Get Flesch reading ease, grade level, sentence length and long-sentence flags for any text.
A readability score checker estimates how easy text is to read using formulas such as Flesch Reading Ease and the Flesch-Kincaid grade level, based on sentence and word length. Plain wording helps both readers and the AI systems that summarise your page.
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Each finding says what it means and what to do next, not just a raw value.
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A few paragraphs or a full article.
Check grade level and long sentences.
Shorten sentences and swap complex words.
The score is a rough guide to how demanding your text is, based on sentence and word length. A higher Flesch Reading Ease number and a lower grade level mean easier reading. Use it as a prompt to review the longest sentences and the heaviest words rather than as a target to hit exactly. Split sentences that carry several ideas, swap jargon for plain terms, and use shorter paragraphs and descriptive subheadings. Match the level to your reader: a consumer guide should read easily, while an expert piece can sit higher if the vocabulary is necessary. Re-run the check after edits and compare drafts, but always read the text aloud as a final test.
Avoid chasing a perfect number. Formulas count syllables and sentence length, so they cannot judge accuracy, structure or clarity of ideas. Simplifying to the point of losing necessary technical terms can make an expert article less useful. Another mistake is applying English formulas to text in other languages, which gives unreliable results. Do not paste headings, code or lists with the body and expect an accurate score; lists and fragments distort averages. Also avoid short, choppy sentences throughout just to raise the score, since rhythm matters. Use the score as one signal alongside feedback from real readers and the questions they ask.
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