.WBK File Extension
File Type 1WordPerfect Workbook
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
Workbook document created by Corel WordPerfect (part of WordPerfect Office).
File Type 2Word Document Backup
This file is saved in a binary format, which requires a specific program to read its contents.
WBK backup files are automatically created when the "Always create backup copy" option is enabled in Word. You may enable this option in Word 2003 by navigating to. In Word 2007, select from the Microsoft Office Button.
NOTE: If a WBK file is not found on your system, there may also be an auto-save file (.ASD) that can recover the Word document.