Analyze your text with 7 proven readability formulas. Get Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, Coleman-Liau, SMOG, ARI, and Dale-Chall scores instantly. All processing happens in your browser -- your text never leaves your device.
Get comprehensive readability analysis with Flesch Reading Ease, Flesch-Kincaid, Gunning Fog, Coleman-Liau, SMOG, ARI, and Dale-Chall scores calculated simultaneously from a single text input.
Each score is mapped to a U.S. school grade level and reading difficulty interpretation, making it easy to understand who your target audience should be and how accessible your writing is.
Beyond readability scores, get word count, sentence count, paragraph count, syllable count, average words per sentence, average syllables per word, complex word count, and time estimates.
All analysis runs entirely in your browser using JavaScript. No text is ever sent to a server, stored, or logged. Safe for confidential documents, drafts, and sensitive content.
Readability scores are mathematical formulas that estimate how easy or difficult a piece of text is to read. They analyze factors like sentence length, word length, syllable count, and vocabulary complexity to produce a numerical score or grade level. These scores help writers, educators, healthcare professionals, and content creators ensure their text is appropriate for their intended audience.
Clear, readable writing is essential in every field. Studies show that readers are more likely to engage with and understand content written at an appropriate reading level. For web content, readability directly impacts user experience, bounce rates, and conversion rates. In healthcare, patient materials written at a 6th-grade reading level improve comprehension and health outcomes. In legal and government contexts, plain language requirements mandate readability standards for public-facing documents.
Most readability formulas use two primary variables: sentence length (average words per sentence) and word complexity (measured by syllable count or comparison to word lists). Longer sentences and multisyllabic words make text harder to read. The Flesch Reading Ease score outputs a 0-100 value, while grade-level formulas like Flesch-Kincaid and Gunning Fog output a U.S. school grade level. The Dale-Chall formula takes a different approach, comparing words against a list of approximately 3,000 words familiar to 4th graders.
Content writers use readability scores to ensure blog posts and articles are accessible to their target audience. Technical writers use them to simplify documentation. Teachers use them to select age-appropriate reading materials. Healthcare professionals use SMOG scores to evaluate patient education materials. Legal teams use readability analysis to comply with plain language regulations. Marketing teams use readability scores to optimize email campaigns, landing pages, and ad copy for maximum engagement.
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