Tools › Readability Checker
Readability Checker
Free readability score calculator: Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog and ARI, plus word count and reading time.
Use it from code
The same function is available as an API endpoint. Free tier: 50 calls per day without a key. Pro lifts the limit.
curl -X POST https://spincrus.uz/api/v1/tools/readability-checker \
-H "content-type: application/json" \
-H "x-api-key: YOUR_KEY" \
-d '{"text":"The quick brown fox jumps over the lazy dog. It was a sunny day and everyone was happy."}'FAQ
What is a good Flesch Reading Ease score?
Aim for 60-70 for general web content. Higher is easier; most popular blogs score 60-80.
How is the grade level calculated?
Flesch-Kincaid uses average sentence length and syllables per word to estimate the US school grade needed to understand the text.
Is my text stored?
No. The free tool runs entirely in your browser; the API processes requests in memory and stores nothing.
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