Readability Checker
Free Readability Checker
Analyze your content's readability, sentence structure, vocabulary and reading difficulty instantly — without any API.
100% Free
No API Required
Privacy Friendly
English Readability
Content Editor
Paste or type your content below. Analysis updates automatically.
Readability formulas are optimized for English text. Some statistics may still be available, but readability scores may not be reliable for non-English content.
Quick Statistics
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Reading Time
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Avg. Sentence
Overall Readability Score
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Based on multiple readability formulas
Readability Formulas
Flesch Reading Ease
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Flesch-Kincaid Grade
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Gunning Fog Index
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SMOG Index
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Automated Readability Index
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Coleman-Liau Index
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Score Breakdown
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Readability
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Sentence Structure
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Word Complexity
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Paragraph Structure
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Vocabulary Diversity
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Overall
Content Summary
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How to Improve Your Content
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Sentence Analysis
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Word Analysis
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Vocabulary Analysis
Run analysis to see vocabulary insights.
Paragraph Analysis
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Passive Voice Estimate
Run analysis to see passive voice detection.
Analysis History
Stored only in your browser's local storage.
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Frequently Asked Questions
A readability score is a numerical measure that estimates how easy or difficult a piece of text is to read and understand. It is calculated using formulas that consider factors like sentence length, word length, and syllable count.
A good readability score depends on your audience. For general web content, a Flesch Reading Ease score of 60-70 (Fairly Easy to Standard) is typically recommended. For content aimed at experts, higher difficulty may be acceptable.
The Flesch Reading Ease score rates text on a 0-100 scale. Higher scores indicate easier readability. Scores of 90-100 are very easy, 60-70 are standard, and 0-30 are very difficult.
The Flesch-Kincaid Grade Level indicates the US school grade level required to understand the text. For example, a score of 8 means the text is understandable by an average 8th-grade student.
Use shorter sentences, prefer common words over complex ones, break long paragraphs into smaller chunks, use active voice instead of passive, and include clear headings to structure your content.
Aim for an average sentence length of 15-20 words. Sentences longer than 25 words can become difficult to follow and may need to be split into shorter sentences.
Yes, readability can indirectly affect SEO. Content that is easy to read tends to keep visitors engaged longer, which can reduce bounce rates and improve time on page — both positive signals for search engines.
No. This tool uses traditional readability formulas (Flesch, Flesch-Kincaid, Gunning Fog, SMOG, ARI, Coleman-Liau) calculated locally in your browser. No AI or external API is involved.
No. Your content stays in your browser. All analysis is performed locally using JavaScript. Your text is never sent to any server or third-party service.
Absolutely! This tool is perfect for analyzing blog posts, articles, website copy, academic writing, and any other English content you want to make more readable.
Your content stays private
Readability analysis is performed directly in your browser. Your text is not sent to any external API or server.