赤ペンくん is a free Chrome extension designed to assist students of the comprehensive Japanese beginner course by providing assignment correction features. This tool aims to streamline the learning process, making it easier and faster for users to grasp the Japanese language. With user-friendly adjustments and enhancements, it caters specifically to learners looking for an efficient way to receive feedback on their assignments.

The latest version, v0.0.3, includes interface adjustments and improved response speed, enhancing the overall user experience. Additionally, a new reporting button has been integrated, allowing users to communicate issues or suggestions directly through the extension. Previous updates also focused on interface improvements and the addition of a reporting link, ensuring that the tool remains responsive to user needs.