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Reading Level Analyzer

Analyze your web copy or page content for readability. Get Flesch-Kincaid grade level, Flesch Reading Ease score, and Gunning Fog Index. See which sentences are too long, detect passive voice, and check against WCAG SC 3.1.5 (Reading Level) which recommends content be readable at lower secondary education level.

Why This Matters

WCAG Success Criterion 3.1.5 (Reading Level) requires that when content requires reading ability more advanced than lower secondary education level, supplemental content or a simpler version is available. Plain, accessible language benefits everyone — especially users with cognitive disabilities, non-native speakers, and people with lower literacy levels.

How to Use This Tool

  1. 1

    Paste your text

    Paste any web copy, article, or page content into the text area.

  2. 2

    Review scores

    See Flesch Reading Ease (0–100), Flesch-Kincaid Grade Level, and Gunning Fog Index instantly.

  3. 3

    Check WCAG 3.1.5

    The tool tells you if your content meets the WCAG SC 3.1.5 reading level recommendation (Grade ≤ 9).

  4. 4

    Review suggestions

    See which sentences are too long or complex and get actionable improvement tips.

Frequently Asked Questions

What is Flesch-Kincaid Grade Level?

A readability formula that estimates the US school grade level required to understand the text. Grade 8–9 is recommended for general web content. WCAG SC 3.1.5 targets Grade 9 or below.

What is Flesch Reading Ease?

A score from 0 to 100 where higher = easier to read. A score of 60–70 is considered standard (8th–9th grade). Below 30 is very difficult (college-graduate level).

Does this tool require sending my text to a server?

No. All analysis runs entirely in your browser using JavaScript. Your text never leaves your device.

What is WCAG SC 3.1.5?

WCAG Success Criterion 3.1.5 (Reading Level, Level AAA) requires that when text needs more than lower-secondary education reading ability, a simpler alternative or supplemental content is available.

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