Free Content Tool

Readability Score Checker

Paste any text and get Flesch-Kincaid Reading Ease and Grade Level scores instantly. See how hard your content is to read.

100% Free No Sign-up Instant Results
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Paste content and click Check Readability

What Is This Tool?

What Is a Readability Score?

A readability score measures how easy a piece of writing is to understand. The two most widely used formulas are the Flesch Reading Ease score (0-100, higher is easier) and the Flesch-Kincaid Grade Level (the approximate years of education needed to read it comfortably). Both use average sentence length and average syllables per word.

For general web content, aim for a Flesch score of 60-80. AI Overviews and answer engines like Perplexity cite clear, direct content far more than dense academic writing. If your content is hard to read, it is also harder to rank and harder to get cited.

  • Flesch 90+: Very easy (5th grade level)
  • Flesch 60-70: Standard (8th-9th grade, most news writing)
  • Flesch below 30: Very difficult (academic / legal)
  • Aim for sentences under 20 words on average
  • Syllables per word under 1.5 keeps content accessible

How to Use

How to Check Your Readability

  1. 1
    Paste Your Content

    Copy and paste any text. You need at least 3-4 sentences for the scores to be meaningful.

  2. 2
    Click "Check Readability"

    The tool counts words, sentences, and syllables, then calculates both Flesch scores.

  3. 3
    Review and Improve

    Read the plain-English interpretation. Split long sentences, swap complex words for simpler ones, and re-check.

Learn More

Readability and Why It Affects Rankings

Does readability affect SEO?

Google has not confirmed readability as a direct ranking factor. But readable content gets lower bounce rates and more time on page, both of which are engagement signals. Content that readers actually finish is also more likely to earn links. The indirect effect on rankings is real even if the direct one is not.

AI content and the readability problem

Most AI-generated content defaults to long sentences with lots of qualifiers and abstract nouns. That pushes Flesch scores low. Running a readability check after generating AI content is one of the fastest ways to identify where to trim and simplify before publishing.

Readability and AI search citations

AI engines like Perplexity prefer content that leads with a direct answer. Short sentences, active voice, and concrete language all make content easier for AI to extract and quote accurately. Writing for readability and writing for AI citation are essentially the same task.

FAQs

Readability Score FAQs

What is a good Flesch Reading Ease score?
For most websites, 60-75 is the target. That is clear enough for a broad audience and professional enough for B2B.
What is the Flesch-Kincaid Grade Level formula?
Grade Level = 0.39 x (words/sentences) + 11.8 x (syllables/words) minus 15.59. A score of 10 means a 10th-grade reading level.
How do I improve my readability score?
Break sentences longer than 25 words in half. Replace 3-syllable words with shorter equivalents where you can. Use active voice.
Does this work for languages other than English?
The Flesch-Kincaid formulas were built for English. For other languages the scores will be indicative but not calibrated to published benchmarks.

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