Readability Checker
Score your writing with Flesch Reading Ease, Flesch-Kincaid Grade, and ARI, plus word, sentence, and syllable counts.
Processed locally in your browser — nothing is uploaded.
0 characters
Paste some text to score its readability.
What the scores mean
- Flesch Reading Ease: 0–100 scale where higher is easier. 60–70 reads as plain English; below 30 suits academic writing.
- Flesch-Kincaid Grade: The US school grade needed to follow the text. 8 means an eighth-grader can read it comfortably.
- Automated Readability Index: Also a US grade level, but based on characters per word instead of syllables — stricter on long words.
About Readability Checker
Paste your draft and see three standard readability scores side by side: Flesch Reading Ease (higher is easier), Flesch-Kincaid Grade, and the Automated Readability Index (both expressed as US school grades). Supporting counts — words per sentence and syllables per word — show what is driving the score.
Everything is computed in your browser with a syllable-counting heuristic, so drafts never leave your machine.
Common uses
- Keep marketing copy in the plain-English band (60–70 Reading Ease)
- Check that documentation matches its audience's grade level
- Find out whether long sentences or long words are hurting a draft
Limitations
- English syllable counting is heuristic, so scores can differ by a point or two from other tools
- The formulas were designed for English prose — code, lists, and other languages score unreliably