Free Readability Score Checker: Flesch-Kincaid, Gunning Fog & More
Get your Flesch-Kincaid readability score and actionable writing tips
FreeAbout Readability Score Analyzer
Clear writing isn't just about grammar — it's about how easily your audience can absorb what you've written. Academic research consistently shows that content written at a lower reading grade level outperforms harder text in time-on-page, comprehension, and conversion. The free Readability Score Checker calculates five established readability indexes simultaneously — Flesch-Kincaid Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, and Automated Readability Index — and highlights specific passages dragging your score down with actionable rewrites.
How to Use Readability Score Analyzer
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1Paste Your Text
Copy and paste your article, blog post, email, report, or any other text into the analyzer. Works best with at least 100 words for statistically meaningful results.
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2Run the Analysis
Click "Analyze" to calculate all five readability scores simultaneously. Results appear in seconds regardless of content length.
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3Review Your Scores
Each index is shown with a plain-English interpretation. Flesch-Kincaid Reading Ease ranges from 0–100 (higher = easier). Grade levels correspond to US school years.
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4Apply the Improvement Tips
The tool highlights sentences that are too long, flags passive voice instances, and identifies complex words — with specific rewrites suggested for each issue.
Why Readability Scores Matter for Content and SEO
Readability Score Analyzer is built for users who need results right now — without sign-up friction, credit systems, or paywalled features. Whether you're a professional, student, or curious individual, every feature is fully accessible, private, and unlimited.
Who Uses Readability Score Analyzer?
Blog writers use it to ensure posts hit the Grade 7-8 sweet spot. Technical writers make documentation accessible. Email marketers check campaigns before sending. Teachers gauge whether student writing is age-appropriate. Legal and medical professionals simplify documents for general audiences.
People Also Search For
Common search queries this tool answers:
Frequently Asked Questions
What is the Flesch-Kincaid Reading Ease score?
Flesch-Kincaid Reading Ease scores content on a 0-100 scale — higher scores mean easier reading. Scores of 60-70 are ideal for most online content (Grade 8-9 level). The Guardian targets around 67; Harvard Law Review sits below 30. The formula penalizes long sentences and words with many syllables.
What reading grade level should my blog content target?
For general web content, Grade 7-8 (Flesch-Kincaid score 60-70) performs best for engagement, time-on-page, and Google rankings. For technical audiences, Grade 10-12 is acceptable. Content below Grade 6 can feel patronizing for professional audiences.
Does Google use readability as a ranking factor?
Google doesn't directly use Flesch-Kincaid as a ranking signal, but readability directly affects dwell time and bounce rate — both of which influence rankings. Easier-to-read content keeps visitors on your page longer and reduces the pogo-sticking that signals poor content quality to Google.
What percentage of passive voice is acceptable in writing?
Most writing guides recommend keeping passive voice below 10% of sentences. Above 15% and content starts to feel distant, bureaucratic, and hard to follow. Our tool shows your exact passive voice percentage and highlights the specific sentences to rewrite in active voice.
Is the readability score checker free?
Yes — completely free. Paste any amount of text to get five readability scores simultaneously (Flesch-Kincaid, Gunning Fog, SMOG, ARI, and grade level), plus passive voice percentage and actionable improvement tips. No account required.
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