Hey everyone! I’m a ~N2 level Japanese learner and currently doing my Masters in Comp Sci & AI. I couldn’t find any decent free Japanese grammar checker online, so I decided to make an AI model which can highlight grammatical errors in Japanese! It’s totally free to use, there are no ads or anything, so if you wanna check it out just click the link below -
How to use it
Just type your text in, hit check, and like magic, underlines will appear under any problematic parts of your sentence. Be aware there’s a limit of 100 sentences, after which you’ll have to wait a while before checking again (to prevent the servers getting overloaded).
How accurate is it?
Will it always get everything right? Nope - do note, this is still experimental and a work in progress. Don’t use this to check your Japanese resume, but if you’re wondering whether a sentence sounds weird or might be off, this can help you figure out which part is wrong.
Based on everyone’s helpful feedback, I’ve re-trained the model on a much larger dataset, including data from Twitter and Japanese web novels. You may have noticed a fairly big accuracy boost lately, especially on colloquial text. Thanks to everyone who gave advice and keep it coming!
If you’re interested in this sort of thing or know how to code, you might be interested in checking out the source code I used to create the data. You can also download the full model for use in whatever you like, at my github page:
Thanks to everyone who gave feedback to the model through the mechanism on the site! Thousands of sentences were sent as feedback which was really helpful to me in seeing where the model was going wrong. Since the performance is now pretty good, I’ve removed the feedback mechanism which means, no more annoying messages asking you for feedback! Should make checking things much quicker. As always though, feel free to send me your thoughts or problems with the site, either here or at the email address on the website.
I decided to re-design the site with a brighter theme, since some people couldn’t read the text clearly. I’ve also set the default language to English.
Thanks for all your interest, almost 10,000 sentences have now been checked on 文法ーCHECK!
As always let me know if you have suggestions or issues!