Free Readability Checker
Flesch reading ease, grade level and keyword density.
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Audit your whole site (not just one page), track keyword rankings, schedule weekly checks and get an AI fix plan.
What does the Readability Checker do?
Paste any text to measure how easy it is to read: Flesch Reading Ease, Flesch-Kincaid grade level, average sentence length and long sentences. Add a focus keyword to check its density, and see the terms your text emphasizes most.
How to use it
- 1Paste your draft or published copy (at least 20 characters).
- 2Optionally add a focus keyword.
- 3Shorten long sentences and aim for a reading ease of 60+ for general audiences.
Frequently asked questions
- What keyword density is ideal?
- There is no magic number. Use the keyword naturally — typically 0.5–2%. Above ~3% can read as keyword stuffing.
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