Japanese Grammar Checker
An online Japanese grammar checker for learners and writers: paste Japanese to fix grammar, particles (助詞), conjugation, and punctuation without changing your meaning. Each correction comes with a short explanation. You can also listen to the Japanese input or generated output to check pronunciation and rhythm.
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Frequently asked
Yes. Proofread mode checks Japanese grammar, particles, conjugation, and punctuation, and shows why each fix was made.
No. Proofread mode keeps your meaning and only fixes errors and unnatural phrasing.
Yes — each change includes a short reason and the relevant grammar point.
Up to 2,000 characters per request, on every plan.
Yes. You can listen to both the input and the rewritten Japanese. Free users can use browser voice reading; Premium users can enable high-quality Japanese voice reading.