There are 20 other file types using
the BAK file extension!
.bak - RE-TOS backup file
.bak - Grade Organizer backup file
.bak - TBK Tracker deleted course INI file
.bak - Autodesk AutoCAD backup
.bak - Mozilla Firefox bookmarks backup
.bak - ACT! backup file
.bak - Canvas drawing backup file
.bak - T-FLEX autosave file
.bak - FreeBSD file
.bak - VoCATS modified test backup file
.bak - Linux installation data
.bak - Mineral Resources Data System (MRDS) database file
.bak - Visual UML (Unified Modeling Language) backup file
.bak - AcqURL bookmarks backup file
.bak - Corel WordPerfect document backup file
.bak - BSL background subtraction of image file
.bak - Essbase backup of security file
.bak - THEOS backup text file
.bak - Finale backup file
.bak - ProShow Producer backup
BAK file extension - Generally a backup created by various software applications
What is bak file? How to open bak files?
File type specification:
File extension bak is traditionally used for backups for decades.
Generally speaking, a bak file is a backup of original file, when the original extension is renamed to somename.bak. So, to restore original file, rename file to its original extension, if you know it, that is.
Many software apps also auto save with original documents or projects also a backup copy with the same file name.