Free Readability Checker
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About the Readability Checker
Check the readability of your writing with the Flesch Reading Ease score and grade level — see word, sentence and syllable stats, all in your browser with no upload.
How to use the Readability Checker
- 1Paste your writing into the box — it's analysed on your device.
- 2See the Flesch Reading Ease score and the estimated US grade level instantly.
- 3Check the word, sentence and syllable stats below the score.
- 4Simplify long sentences or complex words if the score is lower than you'd like — nothing is uploaded.
Frequently asked questions
Is this readability checker free?
Yes — completely free, with no sign-up and no watermark.
Is my text uploaded anywhere?
No. The score is calculated entirely in your browser — your text never leaves your device.
What is the Flesch Reading Ease score?
It's a widely used readability formula based on average sentence length and average syllables per word. Higher scores (up to 100) mean easier reading; lower or negative scores mean denser, harder-to-read text.
What does the grade level mean?
It's the Flesch–Kincaid Grade Level, an estimate of the US school grade a reader would need to have reached to easily understand the text. For example, a grade level of 8 suggests writing that's clear to most 13–14 year olds.
How accurate is the syllable count?
It uses a standard syllable-counting heuristic based on vowel groups, the same approach most readability tools use. It handles the great majority of English words, but words where two adjacent vowels are voiced separately — “idea”, “poem”, “created” — come out one short, because no spelling rule separates those from “bread” or “queue”. Treat the score as a helpful estimate rather than an exact measurement.
Does it work on text that isn't English?
No, and it will tell you so rather than guess. Flesch Reading Ease is built on English syllable counts, so text in Cyrillic, Chinese, Japanese or another non-Latin script has no syllables to count and would otherwise score a meaningless perfect 100. When that happens the score is withheld and only the word, sentence and syllable counts are shown.