Calculate Flesch, Gunning Fog, SMOG, Coleman-Liau, and ARI readability scores for any text or URL.
Content Readability Score CheckerGratisPopulairContent SEOText or URL
Paste your content, or fetch it from a live URL where the tool offers that.
Key features of the readability score checker
Multiple readability formula scores in one analysis
Word, sentence, and syllable count breakdown
Average sentence length and word length metrics
Recommended reading level for your target audience
Highlights overly complex sentences for editing
How to use the readability score checker
01
Paste your content
Copy and paste your article or text into the readability checker input area.
02
Run the analysis
Click 'Check Readability' to calculate scores across all readability formulas.
03
Review your scores
See your Flesch Reading Ease score (higher = easier) and grade level estimates.
04
Identify problem sentences
Look for overly long or complex sentences that drag down your readability score.
05
Revise and re-check
Shorten long sentences, replace complex words with simpler alternatives, then re-run the check.
What is a readability score checker?
The Readability Checker analyses your text using multiple readability formulas — Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, and Coleman-Liau Index — to determine how easy your content is to read and understand.
Readability directly affects user engagement and SEO. Content that's too complex increases bounce rates; content that's too simple may not convey expertise. Google's helpful content guidelines emphasise writing for your audience — this tool helps you calibrate your writing level to match your readers' expectations.
Why use a readability score checker?
Google rewards content that genuinely helps readers. If your content is too technical, casual readers bounce. If it's too simple for a professional audience, you lose credibility. Readability scores give you data-driven guidance to calibrate content complexity for maximum engagement and time-on-page.
Flesch Reading Ease scores range from 0–100. Scores of 60–70 are ideal for most web content (plain English). Below 30 is very difficult (academic/legal); above 80 is very easy (children's content).
What readability level should my content target?
For general web audiences, aim for a Flesch-Kincaid Grade Level of 7–8 (middle school reading level). Professional B2B content can target grade 10–12. Consumer content should aim for grade 6–8.
Does readability affect SEO?
Readability indirectly affects SEO through engagement metrics. Easy-to-read content reduces bounce rates, increases time on page, and earns more shares — all positive signals that can support higher rankings.
What makes content hard to read?
Long sentences (over 20 words), complex vocabulary, passive voice, too many prepositional phrases, and dense paragraphs without breaks all reduce readability.
Should I always aim for the highest readability score?
No. Match your readability to your audience. Medical professionals expect technical language; general consumers need plain English. The goal is appropriate complexity for your specific readers, not the highest possible score.
More free content SEO tools
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Content Readability Score Checker is one piece of the puzzle. See how ChatGPT, Gemini, Perplexity, and Google AI Overviews actually view your brand, and get a prioritised list of fixes, with a free AEO & GEO audit from AI Rank Lab.
One check is a start. The audit checks the whole site.
