Text Readability Score
Check how easy your text is to read using Flesch-Kincaid and other formulas.
Last updated: April 28, 2026
Reading Ease Score
Very Difficult
Analysis Result
College graduate level. Best understood by university graduates.
Text Metrics
100% Client-Side Processing
Text Readability Score
Optimize your writing for your target audience with data-driven readability metrics. Our Readability Score tool calculates multiple industry-standard formulas including Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, and Coleman-Liau Index. Understand at which grade level your content is accessible, identify overly complex sentences, and get a clear readability verdict with actionable recommendations. Essential for web copywriters ensuring content matches their audience's reading level, educators preparing age-appropriate materials, technical writers simplifying documentation, and ESL content creators validating text accessibility. Each formula is computed from syllable counts, sentence lengths, and word complexity, and every score is shown alongside what it means in plain language. Long documents are handled without lag, results refresh as you edit, and because nothing is uploaded, confidential drafts and exam material stay private on your device throughout. All calculations are performed instantly in your browser.
Why This Tool Exists
What makes this useful — and why I built it this way.
Multiple Scoring Models: Calculate Flesch-Kincaid, Gunning Fog, and SMOG levels.
Writing Diagnostics: Identify long sentences and complex words.
Target Audience Alignment: Verify copy complexity matches reader groups.
Plain-Language Verdicts: Understand every score without learning the formulas.
Private Calculation: All math runs locally with no text uploads.
When You'd Use This
Real situations where this tool saves the day.
Web Copywriting: Optimize landing page readability to keep users engaged.
School Publishing: Ensure student reading assignments match grade parameters.
Technical Manuals: Simplify dense guides to make them easier to follow.
Health Communication: Check that public guidance is easy for anyone to follow.
Email Campaigns: Tune newsletter copy to a comfortable reading level.
Using Text Readability Score
It's straightforward — here's how it works.
Paste your article or essay.
Check the generated scores in the analysis panel.
Read the plain-language verdict for each formula.
Adjust your sentence length and word choice to improve clarity.
Recheck until the scores match your target audience.
Questions People Ask
Honest answers about how this works.
What is a good readability score?
For general audiences, a Flesch Reading Ease score of 60 to 70 is considered good, roughly an 8th or 9th grade level. Technical or academic writing often scores lower by design, so compare your result against the audience you actually intend to reach.
How does it count syllables?
Syllables are estimated with pattern-based rules rather than a dictionary, counting vowel groups inside each word. This is the same approach most readability tools use, and it is accurate enough for everyday text, though unusual words and abbreviations can be off by one syllable.
Does my text leave the browser?
No. Every formula is calculated inside your browser from the text you paste. Nothing is stored or sent to a server, so essays, manuscripts, and confidential reports can be checked without any risk of them leaving your machine at any point.
Why did my score drop after a small edit?
Readability formulas react strongly to sentence length. Splitting or joining just a few long sentences can move the Flesch score by several points, and adding one complex word shifts the grade level. Recheck after each meaningful edit to track the direction of change.
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