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AI-powered Japanese comprehension.

文法ーCHECK lets you check your Japanese sentences for grammatical errors using an AI model.

Just type in the box and hit チェック. You'll get a result in a few seconds. Any errors will be underlined: you can click on them to see the suggested edit. If there were no errors, you'll see a tick in the corner. Really short sentences won't be checked.

Please note this is still an experimental service and results may not always be accurate.

Data entered on this site may be used for training future AI models.

Usage limits

To save on server capacity, there are rate limits on sentence checking. Once used, you will not be able to check any more until 12 hours later.

Unchecked sentences will be highlighted in brown.


Unregistered user icon

No account

Sentences: 15 per 12 hours


Registered user icon

Free account

Sentences: 100 per 12 hours

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If you have any questions or want to get in touch, send an email to [email protected]!