0Flesch ease
Overall readability
Text analysis tool
Readability Checker
Measure how difficult your text is to read using five established formulas, sentence-level evidence, and transparent local calculations.
Formula dashboard
Readability scores
Why scores differ
Each formula emphasizes different features. Flesch, Fog, and SMOG use syllables or complex words, while Coleman–Liau uses character counts. Treat the combined result as guidance, not a judgment of content quality.
How to use this tool
Use a representative passage, select the intended audience and run the check. Compare the formula results, then inspect difficult sentences for unnecessary complexity or missing explanation.
What to check
Readability formulas measure selected text features. They cannot determine factual accuracy, argument quality or whether a technical term is necessary.
Why do different formulas give different results?
They use different features and assumptions, such as sentence length, syllables or characters. Treat disagreement as a reason to inspect the text, not to chase one perfect score.