Paste your text to grade how easy it is to read — Flesch Reading Ease, Flesch–Kincaid grade level, Gunning Fog and SMOG update live as you type. Clearer copy helps both readers and AI answer engines. Everything runs in your browser.
Flesch Reading Ease
— —Flesch–Kincaid Grade
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Gunning Fog
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SMOG Index
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Reading Time
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Words
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Sentences
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Syllables
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Avg words / sentence
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Avg syllables / word
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Complex words
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Syllable counts are a heuristic estimate, so the scores are approximate. The formulas are the standard published ones.
Paste or type your text into the box — a paragraph, a blog draft, a product description — and the scores update as you write. The headline number is Flesch Reading Ease on a 0–100 scale, where higher means easier; its plain-English band tells you roughly which reading level the text sits at. Alongside it you get Flesch–Kincaid grade level, the Gunning Fog and SMOG indices, and the raw counts — words, sentences, syllables, averages and estimated reading time — that the formulas are built from.
Readability is a signal, not a rule: aim for plainer prose where your audience is broad, and accept denser text where readers are specialists. Because syllables are estimated rather than looked up in a dictionary, treat the numbers as close approximations. Nothing you paste is uploaded — it all runs locally in your browser.