Academic Readability Analyzer: measure the complexity of your academic writing

Paste your text and get instant scores for Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, ARI, Coleman-Liau, and Lexical Density. Everything runs in your browser: your text never leaves your device.

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Private by design. Your text is processed only in this browser using pure vanilla JavaScript. Nothing is uploaded and no external libraries are used.

How to use the Readability Analyzer

  1. 1
    Paste your text Paste your academic text into the input box. You can load the example to see a sample analysis.
  2. 2
    Analyze Press Analyze. The tool calculates all readability formulas locally in your browser.
  3. 3
    Review the results Review the Flesch Reading Ease gauge, grade levels, and detailed word and sentence statistics.

Special features

Seven readability formulas Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, SMOG, ARI, Coleman-Liau, and Lexical Density.
Accurate syllable counting Uses a robust syllable estimation algorithm that handles complex academic vocabulary without external libraries.
Visual gauge A clear visual indicator shows where your text sits on the Flesch Reading Ease scale, from academic to easy.
Detailed statistics Get word count, sentence count, syllable count, average sentence length, and more.
100% private No upload, no account, no analytics, no cookies, no external libraries. Everything runs in the browser.
Offline capable Because the tool is built entirely with vanilla JavaScript, it works completely offline after the page loads.

Frequently asked questions

Is this readability analyzer free?

Yes. The BlowFix Academic Readability Analyzer is completely free, with no account, no signup, and no usage limit.

Which readability formulas are supported?

The tool calculates Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog Index, SMOG Index, Automated Readability Index (ARI), Coleman-Liau Index, and Lexical Density.

What is a good Flesch Reading Ease score?

A score of 60 to 70 is considered plain English, suitable for most readers. Academic texts often score between 30 and 50, which is appropriate for a specialized audience.

Is my text safe?

Yes. Your text is processed entirely in your browser. It is never uploaded, stored, or sent anywhere. The tool does not use cookies, analytics, or localStorage.

Does the tool work offline?

Yes. Because the tool is built entirely with vanilla JavaScript, it works completely offline after the page loads.