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📖 Readability Score – Check Text Readability for SEO & UX

Analyze your content's readability using 6 industry-standard formulas (Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, Coleman-Liau, SMOG, ARI). Improve user engagement and SEO ranking. 100% client-side, free, no signup.

How to use:
✅ Paste method (recommended): Copy your article text → paste → click "Analyze" → instant results.
📝 Sample text: Click "Load Sample Text" → then "Analyze" to see how it works.
🌐 URL method: Some websites block proxies. If it fails, use paste method.

📈 Why Readability Matters for SEO & User Experience

Readability is a measure of how easy your text is to read and understand. Search engines like Google use user engagement signals (time on page, bounce rate) as ranking factors – and poor readability directly increases bounce rates. Content that is too complex for your target audience will lose readers and rank lower. Our Readability Score Checker uses 6 proven formulas to give you an objective assessment of your content's reading level.

🔢 Understanding the Readability Scores

  • Flesch Reading Ease: Higher is better (90-100 = very easy, 0-30 = very difficult). Aim for 60-70 for general audiences.
  • Flesch-Kincaid Grade Level: US school grade level required to understand the text. Aim for 6-8 for general web content.
  • Gunning Fog Index: Years of formal education needed. Aim for 8-10 for web content.
  • Coleman-Liau Index: Based on characters per word, not syllables. Aim for 7-9.
  • SMOG Index: Measure of years of education needed. Aim for 7-10.
  • Automated Readability Index (ARI): Similar to grade level. Aim for 7-8.

📊 Overall Grade Scale

  • A (Excellent – Grade ≤ 6): Very easy to read. Ideal for general audiences, blogs, news.
  • B (Good – Grade 7-8): Easy to read. Suitable for most websites.
  • C (Average – Grade 9-10): Moderate difficulty. Consider simplifying.
  • D (Difficult – Grade 11-12): Hard to read for many users. Rewrite for clarity.
  • F (Very Difficult – Grade 13+): Requires college-level reading. Unlikely to engage most visitors.

⚙️ How Our Tool Works

We extract clean text (removing HTML tags), count words, sentences, syllables, and characters. Then we apply each formula:

  • Flesch Reading Ease: 206.835 – 1.015 × (total words / total sentences) – 84.6 × (total syllables / total words)
  • Flesch-Kincaid Grade: 0.39 × (words/sentences) + 11.8 × (syllables/words) – 15.59
  • Gunning Fog: 0.4 × [(words/sentences) + 100 × (complex words / words)]
  • Coleman-Liau: 0.0588 × (letters/100 words) – 0.296 × (sentences/100 words) – 15.8
  • SMOG: 1.043 × √(30 × (complex words / sentences)) + 3.1291
  • ARI: 4.71 × (characters/words) + 0.5 × (words/sentences) – 21.43

We then average the grade levels (excluding Flesch Ease which uses different scale) and assign an A-F letter grade.

❓ Frequently Asked Questions

What is a good readability score for SEO?
For most websites, aim for a Flesch Reading Ease of 60-70 and a Flesch-Kincaid Grade Level of 6-8. This matches the reading level of the average adult.
Why does URL fetch fail?
Many websites block CORS proxies. Use the paste method – it always works.
Can I test my HTML directly?
Yes, paste the HTML source. Our tool automatically strips HTML tags and analyzes the clean text.

Privacy Guarantee

All processing happens in your browser. We never store any text or URLs.

Keywords: readability score, flesch reading ease, flesch kincaid grade level, gunning fog index, text analyzer, content readability checker, SEO readability tool.

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