The following steps help you transform names and addresses you’ve saved in Google Contacts into a standard (comma-separated value or .csv) file you may use as a data source for postal service ...

Fortunately, most contact systems, including Gmail and Outlook, give you the option to export your contacts to a CSV file, so you won't have to enter names and addresses manually.

Just export the file, click the Gmail button, and it'll take you straight to the page in Gmail you need to upload the contacts. Thanks Jason! Address Book to CSV Exporter ...

CSV files are special text files that are quite common when dealing with spreadsheets. Here's how to open and make them.