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Readability Score Checker

Analyze your content with the Flesch-Kincaid readability formula.

PASTE YOUR CONTENT

📊

Paste your content to see
the readability score

Tips to Improve

  • ✓ Use shorter sentences (aim for under 20 words each)
  • ✓ Replace complex words with simple alternatives
  • ✓ Break long paragraphs into 2-3 sentence chunks
  • ✓ Use active voice instead of passive voice

Why Readability is a Core SEO Metric

The single most underrated SEO metric is Dwell Time (how long a user stays on your page before clicking the 'Back' button). If your readability is poor, users bounce. When users bounce, Google demotes your rankings.

The Flesch-Kincaid Readability Formula

Our tool uses the standard Flesch-Kincaid mathematical formula, which evaluates:

  1. Total Words / Total Sentences: Long, run-on sentences lower your score.
  2. Total Syllables / Total Words: Complex collegiate vocabulary lowers your score.

The Golden Rules of Web Writing

Never try to sound "smart" by using complex words when simple ones will do. Use "use" instead of "utilize". Use "help" instead of "facilitate". Keep paragraphs to a maximum of 3 sentences.

The Final Pre-Publish Check

Writing the content is only half the battle. Before uploading this to WordPress or Next.js, run your draft against our 20-Point SEO Pre-Publish Checklist to ensure your technical SEO is flawless.

External Resources

Learn more about the history and application of the Flesch-Kincaid readability tests.

Wikipedia: Flesch-Kincaid Why Readability Matters for UX

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About the Readability Score Checker

This free readability score checker analyses your text with the Flesch Reading Ease and Flesch-Kincaid Grade Level formulas — the same metrics used inside Microsoft Word and most SEO plugins. It counts syllables, words, and sentences to estimate the U.S. school grade a reader needs to follow your writing on the first pass.

Most web content should aim for a Reading Ease of 60–70 (roughly grade 7–8). Higher scores mean simpler text and usually better engagement, lower bounce, and wider reach. The checker flags long sentences and multi-syllable words so you know exactly what to cut.

How to use it

  1. 1. Paste the paragraph, section, or full article you want to check.
  2. 2. Read the Flesch Reading Ease score (higher = easier) and the Flesch-Kincaid grade level.
  3. 3. Review the flagged long sentences and complex words.
  4. 4. Shorten sentences, swap in plainer words, and re-check until you hit your target.

Frequently asked questions

What is a good readability score?
For blog posts and marketing copy, aim for a Flesch Reading Ease of 60–70 and a Flesch-Kincaid grade level of 7–9. Technical documentation can sit higher; news and lifestyle content often go lower.
How is the Flesch Reading Ease calculated?
Reading Ease = 206.835 − 1.015 × (words ÷ sentences) − 84.6 × (syllables ÷ words). Shorter sentences and fewer syllables per word raise the score.
Does readability affect SEO?
Not as a direct ranking factor, but easier text improves time on page, scroll depth, and conversions — behavioural signals that correlate with better rankings.
Is my text stored anywhere?
No. Analysis is done in your browser and your content is never uploaded.

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Looking for something else? Browse all free AI tools for bloggers or read the AiTooly blog.