日本語誤字チェック is a free Chrome add-on developed by nknytk.dev. This add-on provides suggestions for correcting typos in Japanese text. It supports character substitution and deletion, but does not currently support adding missing characters.

By checking for typos in Japanese text, this add-on contributes to improving the quality of written content, whether it's for emails, chat messages, or blog posts. It's important to note that the accuracy of typo detection is not 100%, and there may be instances of missed detections or false positives. Therefore, it should be used as a reference rather than solely relying on its suggestions.

For those who find setting up the API server challenging, the add-on also includes a JavaScript-based typo detection model that runs within the browser. However, the accuracy of the JavaScript model is inferior to the API version, so if possible, it is recommended to use the API version.

Whether using the API or JavaScript version, it is important to note that no data is sent to third-party servers, ensuring the security and privacy of user information.