A ZBFX file is a backup file created by zebNet backup programs. It stores a backup of data for an email client, such as Outlook or Thunderbird, or a web browser, such as Chrome or Firefox. ZBFX files are useful for backing up data in case of corruption or loss of information or and to preserve information that a user does not want to be altered.

The ZBFX file is used in all of the zebNet backup programs to store backup data. The zebNet backup programs for web browsers include Backup for Chrome, Backup for Firefox, Backup for Internet Explorer, Backup for Opera Browser, and Backup for SeaMonkey. The zebNet backup programs for email clients include Backup for Outlook, Backup for Thunderbird, Backup for eM Client, Backup for Opera Mail, Backup for SeaMonkey, Backup for Postbox, Backup for Live Mail, and Backup for IncrediMail.