https://www.webfx.com/tools/read-able/
Readability Test - WebFX
WebFX Readability Test Tool tests your work and gives a score using standard readability indicators like Flesch Kincaid Reading Ease, SMOG Index, and more.
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https://www.thehoth.com/readability-test/
Best Free Readability Test Checker Tool - The HOTH
How To Use This Tool
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https://en.wikipedia.org/wiki/Lix_(readability_test)
Lix (readability test) - Wikipedia
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