Readability Checker
Check how easy your English text is to read. Analyze reading ease, estimated grade level, sentence length, reading time and other useful writing metrics.
Analysis happens in your browser. Readability formulas provide estimates and should be considered alongside your audience and subject matter.
Readability Analysis
How to Use the Readability Checker
Paste your English text into the editor and click Check Readability. The tool calculates reading ease, estimated grade level, average sentence length, average word length, reading time and other useful measurements.
Higher Flesch Reading Ease scores generally indicate easier-to-read text.
The Flesch-Kincaid Grade Level provides an approximate U.S. school-grade reading level.
Long-sentence detection helps identify sections that may deserve another look.
What Does the Score Mean?
The Flesch Reading Ease formula uses sentence length and syllables per word. Roughly, 90–100 is very easy, 80–89 easy, 70–79 fairly easy, 60–69 standard, 50–59 fairly difficult, 30–49 difficult, and below 30 very difficult. These are estimates, not judgments about content quality.
More Writing Tools
Review common writing issues with the Grammar Checker, check content length with the Word Counter, or change capitalization using the Text Case Converter.
Readability Checker Limitations
Syllable counting in a browser is approximate, and readability formulas cannot fully understand meaning, expertise, tone or audience expectations. Technical content may appropriately receive a more difficult score.
Frequently Asked Questions
What is a readability score?
A readability score estimates how easy or difficult text may be to read. This tool uses Flesch Reading Ease for its main score.
Which grade-level formula is used?
The estimated grade level uses the Flesch-Kincaid Grade Level formula.
What counts as a long sentence?
This tool flags sentences containing more than 25 words for review. A long sentence is not automatically a bad sentence.
Is my text uploaded for analysis?
The calculations on this page are performed locally in your browser with JavaScript.