Bunken Checker for Gmail is a Chrome extension developed by bunken-extension. This free add-on tool provides two key features to prevent accidental email mistakes in Gmail.

The first feature is the ability to check and revise the subject and body of your email with "Bunken". By clicking the "Send to Bunken" button in the Gmail composition window, you can send the subject and body to the Bunken text review tool. Bunken allows you to ensure there are no errors or issues with your email content in real-time.

The second feature is a pre-send checklist that appears in a pop-up dialog. It allows you to confirm the recipients, subject, and content of your email before sending. Once all the items on the checklist are reviewed, the "Send" button becomes visible, enabling you to send your email confidently.

The checklist can be customized in the options menu accessible by clicking the Bunken icon in the browser bar or right-clicking and selecting "Options".

Please note that to use the Bunken text review tool, a separate paid license for Bunken is required.

If the extension is not functioning properly after installation, try reloading Gmail or restarting your browser.