Paste any text and get instant readability scores — Flesch Reading Ease, Flesch-Kincaid grade level, average sentence length, and syllable counts. Useful for blog posts, marketing copy, essays, and any content you want to keep clear and accessible.
Scores update automatically while you type. All analysis runs in your browser.
Enter text above to see your readability score.
Frequently Asked Questions
What is a Readability Checker?
A Readability Checker measures how easy your text is to read using standard formulas like Flesch Reading Ease and Flesch-Kincaid grade level. It helps writers, marketers, and students make sure their content matches the reading level of their audience.
What is Flesch Reading Ease?
Flesch Reading Ease is a score from 0 to 100. Higher scores mean easier reading. Scores above 60 are generally considered plain English. Scores below 30 indicate very difficult, college-level text. The formula uses average sentence length and average syllables per word.
What is Flesch-Kincaid grade level?
Flesch-Kincaid grade level estimates the U.S. school grade needed to understand your text. A score of 8 means an eighth grader can read it comfortably. Blog posts and web content often target grades 6–9 for broad audiences.
How are syllables counted?
Syllables are estimated using a standard heuristic based on English vowel patterns. It is accurate for most common words but may differ slightly from a human count on unusual or technical terms.
Is my text stored or sent anywhere?
No. All readability analysis runs entirely in your browser. Your text never leaves your device.
Can I also count words and sentences?
Yes. This tool shows word and sentence counts alongside readability scores. For more detailed counts, try the Word Counter or Sentence Counter.
Is this tool free and does it work on mobile?
Yes on both counts. The Readability Checker on draft21 is completely free with no sign-up required and works on all devices.