How to use
- Paste Korean text. Each line is treated as one sentence.
- Read the score (signals fired out of 6) and the table of counts and thresholds.
- Check the highlighted lines and rewrite the style, not the meaning.
AI writing tools leave recognisable habits in Korean prose: the same sentence ending repeated line after line, "A가 아니라 B" contrast pairs, commas after connective endings, and sentences that all stay about the same length. This checker counts six of those habits, so editors, students, bloggers and marketers who write or review Korean text can see where a draft sounds machine-made before they publish it.
Each line is treated as one sentence. Lines shorter than 10 characters after trimming are skipped, and at least 5 sentences are needed. The rules and thresholds are: C-8 contrast pairs (2 or more), C-11 a comma right after a connective ending such as -하고, -지만 or -면서 (1 or more), I-4 sentences ending in 해야 한다 or 해야 합니다 (2 or more), F-5 the "~적 + noun" pattern (3 or more), E-1 almost no long sentences (20 or more sentences and under 5% longer than 100 characters), and E-2 the same ending (한다, 합니다, 된다, 입니다, 이다) four times in a row. The score is the number of signals fired out of 6.
This is a pattern-based style check, not a statistical AI detector, and it cannot prove who wrote a text: careful human writing can fire signals and edited AI text can pass. Use the highlighted lines to vary the style while keeping the meaning. Paste plain text only, because HTML tags are not stripped. The text is analysed in your browser and is never sent or saved.