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Free Readability Checker Online

Score your writing with Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, and Coleman-Liau — plus sentence-length breakdown, passive-voice detection, and tips.

Frequently Asked Questions

What is a readability score?
A readability score measures how easy text is to read and understand. It is calculated using factors like sentence length, word length, and syllable count. Higher Flesch scores mean easier reading.
What is a good Flesch Reading Ease score?
For general web content, aim for 60–70 (standard, readable by most adults). Blog posts and marketing copy should target 70–80. Technical documentation can be lower.
What reading level should I write for?
Most web content should target a 7th–8th grade reading level (Flesch-Kincaid Grade 7–8). This ensures broad accessibility without feeling simplistic. News articles typically target 6th–8th grade.
What is the Gunning Fog Index?
The Gunning Fog Index estimates the years of education needed to understand text. A score of 8 means an 8th-grade education suffices. Scores above 17 indicate extremely complex text.
How can I improve my readability score?
Use shorter sentences (under 20 words), prefer common words over complex ones, avoid passive voice, break up long paragraphs, and use subheadings to organize content.