E-mail Export Tool is a free Google Chrome Extension that lets you import emails from your Gmail account to a CSV, JSON, or Comma Separated Format (CSV) file.

Download and install the E-mail Export Tool extension on your Chrome browser.

Next, you'll need to log into your Gmail account and select the type of file you want to export, such as CSV, JSON, or Comma Separated Format (CSV). Next, you'll need to select the file to export. Once you've chosen the file type and selected the file, the rest of the process is pretty self-explanatory. You can choose to send an email to yourself with all your emails. If you want to send an email to multiple people, you can do that with the CSV format.