Korean Readability Index Checker
Scores Korean writing based on average sentence length and word difficulty
Calculates the average number of words per sentence in your Korean text to judge how easy it is to read.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Paste your text.
- Check the average words-per-sentence and the readability result.
FAQ
- What's the most readable sentence length?
- Readers understand text best when sentences run about 10–15 words (eojeol) long.
- Does this tool also check spelling or grammar?
- No — it's not a spell checker. It's a readability-only tool that analyzes sentence length and structure to judge how easy your writing is to follow.
- Does a low readability score mean the writing is bad?
- Not necessarily. Dense, information-heavy writing like reports or papers can score low and still be appropriate — readability matters most for content meant to be skimmed quickly, like blog posts or social media.