Importing testers from comma-separated values (CSV) files is useful when you
want to grant release access to many
testers. This feature saves you
the effort of manually entering individual tester email addresses. You can
use groups to share future releases with the group you created.

After you create a group, you upload a CSV file containing tester emails in
the **Testers \& Groups** tab of the [App Distribution page](https://console.firebase.google.com/project/_/appdistribution)
in the Firebase console. You then import the tester emails from the CSV file
to the group. The CSV file must contain the testers' email addresses in the
first column. All additional columns are ignored. For example:

    ali@example.com
    bri@example.com,This is Ignored,This also
    cal@example.com,Cal Nguyen (ignored)

## Next steps

- To add and remove testers, see
  [Add and remove testers in App Distribution](https://firebase.google.com/docs/app-distribution/add-remove-testers.md.txt).

- Learn how to increase your internal testing base by [creating invite links](https://firebase.google.com/docs/app-distribution/create-invite-links.md.txt).

- To register additional iOS devices manually or programmatically, see
  [Register additional iOS devices](https://firebase.google.com/docs/app-distribution/register-additional-devices.md.txt).