Readability Checker
Readability Checker scores your text against five standard readability formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index and Coleman-Liau Index. It also counts sentences, syllables, complex words and estimates reading time.
Last updated: July 2026
A readability checker scores how easy your text is to read using standard formulas: Flesch Reading Ease (0–100, higher = easier), Flesch-Kincaid Grade Level (US school grade), Gunning Fog, SMOG and Coleman-Liau. It also estimates reading time. All formulas run in your browser — no text is uploaded.
🔒 All analysis runs in your browser using standard readability formulas — your text never leaves your device.
How to use Readability Checker
- Paste your text into the box.
- Read your scores across all five readability formulas.
- See the grade level, reading ease and estimated reading time.
Frequently asked questions
What is a good readability score?
For general audiences, aim for Flesch Reading Ease 60–70 (8th-9th grade). For academic or technical content, 30–50 is normal.
How does Flesch-Kincaid work?
It calculates grade level from average sentence length and average syllables per word. Grade 8 = easy to read for most adults.
Is my text uploaded?
No — everything runs in your browser. Your text never leaves your device.
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