敬語メールライター is a Chrome extension designed to convert casual email language into respectful keigo for Gmail and Outlook users. This tool is particularly beneficial for those who struggle with formal Japanese expressions in business communications or want to create polite emails quickly. It features a simple interface that adds a '敬語' button in the email composition window, allowing users to select the context of their message, such as replies or requests, and adjust the level of politeness according to the recipient's status.

The extension offers a daily free usage limit of 10 conversions, making it accessible for casual users. For those needing more flexibility, a Pro plan is available for unlimited use. Additionally, the extension prioritizes user privacy, ensuring that all input text is only used for AI conversion and not stored on servers. This makes it a reliable option for professionals looking to enhance their email etiquette without compromising personal information.