WAB is a file extension for Windows Address Book files. Microsoft defined this format. WAB files contain contact information. Windows Contacts supports WAB files. The Data Files category comprises various file formats including the Windows Address Book format.
The WAB extension is mainly associated with Microsoft Outlook Express. These address book files contain contact information. WAB files help Outlook Express users manage contacts for sending emails.
You can associate WAB files with other programs. On Windows, right click on a WAB file and choose “Open with” then “Choose another app”. Select another program. On Mac, right click the WAB file and choose “Open with” then “Other…”. Choose another program.
The Windows Address Book format was developed by Microsoft for Outlook. Most WAB file users are in China running Windows 10.
Our site has information on over 25,000 file extensions including WAB. WAB files contain Windows Address Book data for managing contacts.
Microsoft Outlook Express
Microsoft Outlook