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Readability Checker

Score content with Flesch-Kincaid, Gunning Fog, SMOG & more formulas.

0 uses
📝 Your Content
📚 Score Reference
90–100 Very Easy 5th grade
70–90 Easy 6th–7th grade
60–70 Standard 8th–9th grade
50–60 Difficult 10th–12th grade
0–50 Very Hard College+

Scores based on Flesch Reading Ease. Target 60–70 for most web content.

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Paste your content to get started

Get Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, ARI and Linsear Write scores — plus passive voice detection and sentence analysis.

Free Readability Checker - Improve Content Score | Seokify
Check readability score, grade level, sentence length. Free, instant. For writers, marketers.

📌 What is Readability Checker?

Runs 7 industry-standard readability formulas: Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, Coleman-Liau Index, Automated Readability Index (ARI), and Linsear Write Formula. Also detects passive voice frequency and flags sentences over 20 words.

🎯 Why It Matters for SEO

Google emphasises content written for users. Difficult text drives readers away, increases bounce rate, and reduces dwell time. A Flesch score of 60-70 is optimal for most web content.Check readability score, grade level, sentence length. Free, instant. For writers, marketers.

📋 How to Use This Tool

  1. 1 Paste your article, product description, or page copy
  2. 2 Click Analyze Readability
  3. 3 Review the Flesch Reading Ease ring and grade
  4. 4 Check all 7 formula scores in the breakdown section
  5. 5 Apply improvement tips — focus on passive voice and long sentences first

❓ Frequently Asked Questions