Word counter
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Readability checker
Check readability with Flesch Reading Ease, Flesch-Kincaid grade level, Gunning Fog, SMOG, and more. Highlights long sentences.
Sentence highlights
Yellow: hard to read (20+ words). Red: very hard (30+ words).
How to use Readability checker
Check how easy your writing is to read with six standard readability scores:
- Flesch Reading Ease: 0–100, higher is easier. Aim for 60 or more
- Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index: each estimates the US school grade needed to understand the text
Long sentences are highlighted so you can see what to split. Syllables are counted with an English-language heuristic, so scores are close to, but may differ slightly from, other tools.
Readability checker FAQs
Is Readability checker free?
Readability checker is a free online tool on ReallyUseful.Tools. No account is required.
Does Readability checker run in my browser?
Readability checker is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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