LexiCheck Free Japanese Grammar Checker 日本語文法チェッカー
AI-Powered | Explains In Your Native Language
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Supported file types: JPEG, JPG, PNG, WebP. Maximum size: 2 MB.
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Detailed Assessment: If you select the "Detailed
Assessment" option, the results will appear here.
Note: Scores are for reference only.
Tip (Desktop only): Highlight any word, sentence, or paragraph in your essay to activate the AI Writing Assistant and get instant suggestions.

Below is a preview of what’s included in the DOCX files.
record_voice_over AI Voice Customization
(Beta) Personalize the AI voice to better match your teaching style.
description DOCX File Settings
Customize your .DOCX files
school Target Band Level
Pick your band to get feedback that's right for you.
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Click the box or drag your images here to upload.
Supported file types: JPEG, JPG, PNG, WebP. Maximum size: 2 MB.
If your file type isn't listed, please convert your image using CloudConvert Image Converter .
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LexiCheck – Japanese Spelling & Grammar Checker with AI Writing Practice
LexiCheck is an online tool that checks spelling and grammar using AI technology. It is designed specifically for learning and teaching Japanese, including preparation for popular exams such as JLPT, J-Test, and NAT-TEST.
(*) In addition to Japanese, LexiCheck supports more than 100 other languages.
Check Japanese Spelling & Grammar in Just a Few Easy Steps
1
Enter the Text You Want to Check
Type or paste your Japanese text directly into the editor to check grammar and spelling.
2
Select the AI Language
Choose the language the AI will use to explain errors and interact with you.
3
Click “Check Grammar” and View Results
Within seconds, errors will be highlighted in the editor. Click on each one to see detailed explanations.
4
Download the Results (.docx)
The output file is compatible with both Microsoft Word and Google Docs. Teachers can review and adjust the AI comments before sending them to students.
Trusted by 350,000+ language learners and teachers worldwide
4.5/5 (10,000+)
Detect Errors and Learn How to Improve
Powered by AI, LexiCheck can identify Japanese spelling and grammar errors with over 95% accuracy. It helps learners recognize mistakes, understand corrections, and quickly strengthen their writing skills in Japanese.

Short, Simple, and Clear Grammar Explanations
LexiCheck uses a specialized AI model fluent in Japanese and more than 100 other languages. It provides accurate explanations that are brief, clear, and easy to understand for learners of all levels worldwide.

Chat and Learn Japanese Grammar with AI
The AI chatbot is always ready to explain errors in detail and answer questions—either in Japanese or in your native language—so you can understand more deeply and retain knowledge longer.

Export Your Corrected Work to DOCX
LexiCheck creates DOCX files that work seamlessly with Google Docs and Microsoft Word. Errors are highlighted, with grammar explanations added as easy-to-read comments. Teachers can quickly review and adapt the feedback to their own teaching style before sharing it with students.

Global Users
Teachers, tutors, and learners from around the world.
Texts Reviewed
Including essays and exam writing for HSK, IELTS, TOEIC, TOPIK, JLPT, and more.
Languages Supported
Including English, Spanish, French, Chinese, Japanese, Korean, and many others.
Designed for Japanese Learners, Teachers, and Writers
For Learners
- Practice independently with AI
- Assess your level before exams
- Save money on corrections
For Teachers
- Reduce grading time
- Boost teaching efficiency
- Support more students
For Writers
- Spot and fix errors quickly
- Increase writing productivity
- Enhance style and vocabulary
Frequently asked questions (FAQs)
How is LexiCheck different from Grammarly?
Grammarly supports only English. LexiCheck checks spelling and grammar in over 100 languages and is designed especially for language learners. It also includes AI chat to help explain corrections.
Will LexiCheck corrections be flagged as AI-generated or plagiarized?
No. LexiCheck doesn’t rewrite your text—it simply highlights and fixes grammar and spelling mistakes. Your writing remains original and won’t be marked as AI-written or plagiarized.
How can I edit comments in the DOCX file?
To edit comments, open the file with Microsoft Word (desktop or online version): https://word.cloud.microsoft
Can I use Google Docs to open the corrected file?
Yes. Just upload the DOCX file to Google Drive to view or share it like any other Google Doc.
Note: Google Docs doesn’t support comment editing. For full control, use Microsoft Word to edit comments first.
What’s the difference between the free and paid version?
The free version gives you limited usage each week (measured in LexiCredits) and basic features. The paid plan offers full, unlimited access to LexiCheck and other AI tools in the LexiBot platform.
Improve Your Japanese Writing Skills with LexiCheck Today!
LexiCheck is a spelling and grammar correction tool built specifically for learning and teaching Japanese. With consistent practice, your Japanese writing skills will noticeably improve in just a few weeks.
No Login Needed – No Credit Card Required