Readability Checker — Flesch Reading Ease & grade
Check English readability with Flesch Reading Ease and Flesch–Kincaid grade, plus word, sentence and syllable stats.
🔒 Runs entirely in your browser. Your input and output are never sent to a server or stored — fully private.
Scores use English heuristics and are tuned for English text.
About this tool
This readability checker scores how easy your English writing is to read, using the Flesch Reading Ease scale and the Flesch–Kincaid grade level, alongside live counts of words, sentences and syllables. Paste in your text to see at a glance whether it fits your audience and where long, dense sentences are pulling the score down. The analysis runs entirely in your browser, so your draft is never uploaded.
Frequently asked questions
What is a good Flesch Reading Ease score?
The scale runs from 0 to 100, and higher means easier to read. Scores of 60 to 70 are plain, everyday English suitable for a general audience, 90 to 100 is very easy, and anything below 30 reads like dense academic prose. For most websites and articles, aiming for 60 or above keeps your writing widely accessible.
What does the Flesch–Kincaid grade level mean?
It estimates the US school grade a reader would need to understand your text on the first read. A grade of 8 suggests a typical 13 to 14-year-old could follow it, which is a common target for clear public writing, while higher numbers signal more demanding prose. Lowering it usually means shorter sentences and simpler words.
Is my text uploaded, and does this work outside English?
Your text is never uploaded — the scoring runs entirely in your browser, so your draft stays on your device and is not sent to any server. Note that the Flesch formulas are tuned for English, so the reading-ease and grade figures are only reliable for English writing, though word and sentence counts work for any text.