Why do the four formulas disagree?

Each weights sentence length, word length, and syllable counts differently. Reading them together is the point: if all four call a draft "college level", it almost certainly is.

Is my draft uploaded anywhere?

No. All scoring runs locally in your browser — safe for unpublished manuscripts and internal documents.

Readability Analyzer

Analyzer100% In-Browser

Flesch Reading Ease, Flesch-Kincaid grade, ARI, and Gunning Fog scores plus reading time — for clear, honest writing.

Your text stays on this page — nothing is transmitted

Paste at least a couple of sentences (~5+ words) to compute the formulas.

Zero Data Collection

Files are processed 100% locally

Instant Client-Side Speed

Zero network upload delays

Free & Unlimited

No registration or credit card needed

Readability Scores & Grade Levels — Flesch, Kincaid, ARI, Gunning Fog

Paste your text and get four established readability formulas side by side — Flesch Reading Ease, Flesch-Kincaid Grade Level, the Automated Readability Index, and the Gunning Fog Index — plus estimated reading and speaking time and the sentence-length distribution behind the scores.

These are the same formulas used by editors, educators, and plain-language laws; they are deterministic math on word and sentence length, not AI opinion. All formulas are designed for English text, so scores for other languages should be read as rough comparisons only.

Frequently Asked Questions

Everything you need to know about using Readability Analyzer safely and efficiently.

60–70 is plain English understood by most 13–15 year-olds. Higher is easier: 80+ suits consumer content and safety instructions. Below 30 is dense academic-style prose.

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