About Readability Checker

Analyzes text against six readability formulas: Flesch-Kincaid Grade Level, Flesch Reading Ease, Gunning Fog Index, Coleman-Liau Index, Automated Readability Index, and SMOG Index. Computes text statistics (words, sentences, paragraphs, syllables, complex words) using a vowel-cluster syllable counter with silent-e correction. Produces an average grade level, maps it to an audience description, and generates targeted writing recommendations when sentence length or complexity is high.

• Syllable counting: tracks vowel clusters (aeiouy), subtracts one for trailing silent “e,” minimum 1
• Complex words defined as 3+ syllables, used in Gunning Fog and SMOG calculations
• Flesch Reading Ease scored 0–100 (higher = easier), mapped to seven difficulty tiers
• Three sample texts (simple, medium, complex) for instant comparison
• Recommendations trigger when average grade level exceeds 12 or sentences average over 20 words

Frequently Asked Questions

Which readability score should I trust?

No single metric is definitive—that is why this tool runs six of them and averages the grade levels. For web content, target a Flesch Reading Ease of 60–70 (8th–9th grade). For technical documentation, a score in the 30–50 range is acceptable. The average grade level gives the best single-number summary.

How accurate is the syllable counter?

It uses a heuristic (vowel-cluster counting with silent-e correction), which is about 90% accurate for English. It will miscount some words—“area” and “every” are common edge cases. For a rough readability check, this is more than sufficient.