Readability score checker
Analyse text readability with Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog and Coleman-Liau scores. Improve clarity.
- Free, no sign-up
- No data stored
- Reviewed 2026-01-15
Your details
Results
About the Readability Checker
Paste text to get readability scores from four established algorithms. The tool identifies the reading grade level and suggests whether your content is appropriate for your target audience.
How to use the Readability Checker
- Paste your text.
- Select the language (affects syllable counting).
- View scores from all four algorithms.
- Check the suggested reading level.
Frequently asked questions
What Flesch score should I aim for?
For general web content, 60–70 (plain English). Technical documentation: 30–50. Legal/academic: below 30.
How is grade level calculated?
Flesch-Kincaid Grade estimates the US school grade needed to understand the text. Grade 8 is readable by a 13–14 year old.
Does this work for non-English text?
It works best for English. Syllable estimation for other languages is approximate. Results are indicative rather than precise.