How is the Flesch Reading Ease score interpreted?

Scores between 90-100 are considered very easy to read (approx. 5th-grade level). Scores between 60-70 are standard conversational English (approx. 8th-9th grade), while scores under 30 are considered difficult academic reading (college graduate level).

Do you upload my essays or articles to a server?

No. All text parsing, syllable calculations, and readability indexes calculations run locally inside your browser memory buffer. Your intellectual property remains secure.

What is the SMOG readability index?

The SMOG (Simple Measure of Gobbledygook) formula estimates the years of education needed to understand a piece of writing, relying heavily on polysyllable (3+ syllables) word density.

Free Online Readability Score Checker

Input Content Text

Highlight Difficult Areas (Orange = Long Sentences, Purple = Hard Words)

Flesch Reading Ease

Conversational & Clear

Readability Index Scales

Flesch-Kincaid Grade 0.0

Gunning Fog Index 0.0

Coleman-Liau Index 0.0

SMOG Grade Level 0.0

Automated Index (ARI) 0.0

Text Parameters Statistics

Words 0

Sentences 0

Characters 0

Syllables 0

Polysyllable Words (3+ syl.) 0

How to Verify Reading Complexity

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1. Paste Your Text

Paste your drafts, copywriting blog posts, or scientific documents into the main text area.

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2. Review Metrics

Inspect Flesch Reading Ease scores and equivalent scholastic grade indicators computed instantly.

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3. Highlight Constraints

Enable highlights overlays to quickly pinpoint complex words and long sentences.

Outstanding Reading Auditor Features

⚡ Six Readability Formulas

Calculates Flesch Kincaid Grade, Gunning Fog, Coleman Liau, SMOG, and ARI simultaneously.

🎨 Visual Highlights Overlays

Highlights complex polysyllabic terms in purple and sentences with more than 20 words in orange.

🔒 Complete Sandbox Security

All paragraph analysis logic runs entirely inside the local browser context. Your content remains secure.

Flesch Reading Ease Scores Chart

Flesch Score	Readability Category	Equivalent Scholastic Level	Audience Reach
90 - 100	Very Easy	5th grade students	Easily understood by an average 11-year-old
60 - 70	Conversational / Standard	8th - 9th grade students	Suitable for general consumers and mainstream media
30 - 50	Difficult / Hard	College students	Best suited for technical manuals and journals
0 - 29	Very Difficult	College graduates	Suited for scientific journals and academic research

Frequently Asked Questions

What is a polysyllable word? +

Polysyllable words are words that contain three or more syllables (e.g., "representative", "cryptographic"). High polysyllabic density raises readability grade levels.

Why do readability indexes sometimes differ? +

Different indexes use different metrics. For example, the Coleman-Liau formula relies on character count per 100 words, whereas Flesch-Kincaid uses syllables counts.

Is there a limit on text length? +

No. Alphanumeric sets are processed locally within your browser heap, making the analyzer fast even for complete book chapters.

Readability Score & Grade Checker

How to Verify Reading Complexity

Outstanding Reading Auditor Features

Flesch Reading Ease Scores Chart

Frequently Asked Questions

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