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Scores English with Flesch Reading Ease, Flesch-Kincaid Grade and Gunning Fog, and Japanese by average sentence length.

📘 How to Use

  1. Paste your English text into the text area.
  2. View the readability score and recommended reading level.
  3. Improve your text by referring to highlights for long sentences (cyan background) and difficult words (pink underline).

English & Japanese Readability Scorer

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Check English Readability | Improve Your Writing Clarity ✍️

Analyze your text instantly using industry-standard formulas to ensure your message is clear, concise, and accessible.

💡 About This Tool

Whether you’re writing for a global audience, a classroom, or a professional journal, matching your text to the right grade level is key.

This tool calculates your Flesch-Kincaid Grade Level, Flesch Reading Ease, and Gunning Fog Index. It highlights long sentences and complex vocabulary in real-time, pinpointing exactly where your writing might lose a reader’s attention.

📘 Pro Tips for Better Writing

  • Hit the "Sweet Spot": Target a Flesch Reading Ease score of 60-70 for general web content. This ensures your text remains accessible to the widest possible audience.
  • Swap Complex Words: Review words underlined in pink (3+ syllables). Replacing "utilize" with "use" or "initiate" with "start" often makes your writing more punchy.
  • Shorten Long Sentences: Review sections highlighted in cyan (20+ words). Splitting these into two separate thoughts significantly boosts comprehension.
  • Match Your Audience: Use the Grade Level indicator to verify that your academic paper hits the "College" mark or your blog post stays around "8th Grade."

🧐 Frequently Asked Questions

  • What is the Flesch-Kincaid Grade Level?
  • It maps text difficulty to U.S. school grades. A score of 8.0 means an 8th grader can easily understand the content.
  • How does the Gunning Fog Index work?
  • It measures "complex words" and sentence length to estimate the years of formal education a person needs to read your text without effort.
  • Is my data private?
  • Yes. All calculations happen locally in your browser. We never store, save, or view your text.
  • Why do Flesch-Kincaid and Gunning Fog show "-" for Japanese text?
  • These formulas rely on English syllable structure and do not map to Japanese, so they display "-" in Japanese mode. The tool falls back to a sentence-length-based difficulty estimate for Japanese.

📚 Fast Facts

  • The "Harry Potter" Benchmark: The Harry Potter series typically averages a Flesch-Kincaid grade level of 5–6, making it accessible yet engaging for all ages.
  • Legal Requirements: In several U.S. states, insurance policies must score at least 40 on the Flesch Reading Ease scale to ensure they aren't intentionally confusing.
  • The Fog Index: Developed by Robert Gunning in 1952, this formula was originally used to help journalists and business writers strip away "foggy" jargon.