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Generic backup file
File type: Backup file
Files with bak extension can be most often find as one of the many backup files generated by numerous programs, usually by the means of renaming the original extension to bak.
Found 22 different file type records with the same bak filename suffix.
File type category:
Backup file
Date updated: November 7, 2023
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 'original.bak'. To restore original file, you jus have to change it back to the original file extension.
Many software apps also auto save with original documents or projects also a backup copy with the same file name.
Unless you know the original file extension or software that created this bak file, is close to impossible to determine which program may open a *.bak file.
BAK files are often just renamed original files or previous versions of original file, so renaming the extension back to its original usually restores the functionalily.
Losing unsaved work or having badly saved document can be a truly nighmare. Not all is lost however...
File type category:
Backup file
Date updated: July 12, 2018
Record marked as obsolete and not updated for a long time.
The bak file extension is associated with the AcqURL. The bak file contains backup of saved bookmarks.
Most likely some old format without support. No further information could be found.
Software applications that can open bak files:
Microsoft Windows
AcqURL
Software apps that create bak files:
Microsoft Windows
AcqURL
Software apps that backup bak files:
Microsoft Windows
AcqURL
File type category:
Backup file
Date updated: August 8, 2017
File extension bak is associated with the ACT! contact and customer manager. There is many versions if this program. This type of .bak file contains backup of ACT! user data such as customer's names, addresses, history.
Use ACT! backup file software to open files with bak extension.
Backup files typically cannot be converted to anything else.
File type category:
Backup file
Date updated: June 24, 2022
The bak file extension is also used in the Autodesk AutoCAD, a 2D and 3D CAD modeling software for Microsoft Windows and OS X (macOS) operating systems.
The bak file contains a backup of an AutoCAD drawing, which is created automatically should this option be enabled in the program.
You may recover these backups only in AutoCAD program.
Once the backup is recovered by AutoCAD it may be exported as any other DWG drawing.
Software applications that can open bak files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that create bak files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that backup bak files:
Microsoft Windows
Apple macOS / Mac OS X
Software apps that recover bak files:
Microsoft Windows
Apple macOS / Mac OS X
File type category:
Various data file
Date updated: January 23, 2019
Record marked as obsolete and not updated for a long time.
The bak file extension is associated with the BSL software.
The bak file contains background subtraction of image.
Most likely some old format without support. No further information could be found.
Use compatible tools to work with *.bak files.
Probably cannot be converted to other formats.
Software applications that handle other tasks involving bak files:
Linux/Unix
BSL
File type category:
Backup file
Date updated: April 4, 2017
The bak file suffix is associated with the Canvas drawing software. File contains a backup of a Canvas drawing.
Backup is created periodically until the user saves his project, which has a native Canvas drawing file extension.
Use Canvas to work with *.bak files.
File type category:
Backup file
Date updated: July 23, 2019
The bak file extension is associated with the Corel WordPerfect version 6.1.
The bak file contains backup of a WordPerfect document. Backup is created periodically until the user saves his project, which has a native Corel WordPerfect document file extension (w61).
Use Corel WordPerfect to open the *.bak extension files.
Probably cannot be converted to anything else.
Software applications that handle other tasks involving bak files:
Microsoft Windows
File type category:
Backup file
Date updated: November 21, 2018
The bak file extension is related to the Essbase (Extended Spread Sheet dataBASE), a multidimensional database management system (MDBMS) that provides a multidimensional database platform upon which to build analytic applications.
The bak file contains backup of e security file.
Use compatible tools to work with *.bak files.
Probably cannot be converted to anything else.
Software applications that can open bak files:
Microsoft Windows
Software apps that create bak files:
Microsoft Windows
Software apps that backup bak files:
Microsoft Windows
Software apps that recover bak files:
Microsoft Windows
File type category:
Backup file
Date updated: October 20, 2017
The bak file extension is associated with the Finale, a music score writing software for Microsoft Windows and Apple Mac OS X (macOS) operating systems developed by MakeMusic.
The bak file stores backup created with the Finale.
Use Finale to work with *.bak files.
File type category:
Various data file
Date updated: June 1, 2018
The bak files were found in some FreeBSD or NetBSD installation packages.
FreeBSD and NetBSD are Unix-based operating systems for IBM-PC and various other computer platforms.
No further information could be found.
File type category:
Backup file
Date updated: January 31, 2018
Record marked as obsolete and not updated for a long time.
The bak file extension is associated with the Grade Organizer, a gradebook program for Microsoft Windows, developed by isd software.
The bak file contains contains backup of user data from Grade Organizer.
Use Grade Organizer to work with *.bak files.
Software applications that can open bak files:
Microsoft Windows
Grade Organizer
Software apps that create bak files:
Microsoft Windows
Grade Organizer
Software apps that backup bak files:
Microsoft Windows
Grade Organizer
File type category:
Various data file
Date updated: December 1, 2016
The bak file extension is associated with Linux operating system available for various platforms and devices.
The bak file stores some kind of installation data used by Linux system.
MIME types:
application/x-backup
application/x-trash
Software applications that handle other tasks involving bak files:
Linux/Unix
File type category:
Database file
Date updated: December 14, 2018
The bak file extension is associated with the MRDS database format.
MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic characteristics, production, reserves, resources, and references. It includes the original MRDS and MAS/MILS data.
Use compatible tools to work with *.bak files.
Probably can be exported to other formats.
Software applications that can open bak files:
Microsoft Windows
Apple macOS / Mac OS X
File type category:
Backup file
Date updated: June 27, 2025
The bak file extension is associated with the Mozilla Firefox, a web browsing tool for Microsoft Windows, Apple Mac OS X (macOS) and Linux operating systems.
The bak file contains backup of bookmarks.
Use Firefox to work with *.bak files.
Software apps that create bak files:
Software apps that recover bak files:
File type category:
Backup file
Date updated: February 11, 2025
The bak file extension is associated with the ProShow Gold and ProShow Producer applications for Microsoft Windows operating system, developed by Photodex.
The bak file stores backup of ProShow psh file.
With *.bak and *.psh files are also stored autobackup files with file extensions b00, b01, b02, b03, b04, b05, b06, b07, b08, b09....etc.
Rename *.bak file to *.psh and open it in ProShow software.
Probably cannot be converted to other formats.
Software applications that can open bak files:
Microsoft Windows
Software apps that create bak files:
Microsoft Windows
Software apps that backup bak files:
Microsoft Windows
Software apps that recover bak files:
Microsoft Windows
File type category:
Backup file
Date updated: June 8, 2017
The bak file extension is associated with the RE-TOS software developed by Public Works and Government Services Canada.
The bak file contains backup of the RE-TOS data.
The RE-TOS seems to be obsolete product.
Use RE-TOS to work with *.bak files.
Conversion to other formats is not possible.
Software applications that can open bak files:
Microsoft Windows
RE-TOS
Software apps that create bak files:
Microsoft Windows
RE-TOS
Software apps that backup bak files:
Microsoft Windows
RE-TOS
File type category:
Backup file
Date updated: July 24, 2019
The bak file extension is associated with the T-FLEX. File contains a backup of a T-FLEX project file.
Backup is created periodically until the user saves his project, which has a native T-FLEX project file extension.
Use T-FLEX CAD to open the *.bak extension files.
Probably cannot be converted to anything else.
Software applications that can open bak files:
Microsoft Windows
Software apps that create bak files:
Microsoft Windows
Software apps that backup bak files:
Microsoft Windows
Software applications that handle other tasks involving bak files:
Microsoft Windows
File type category:
Various data file
Date updated: June 17, 2018
The bak file extension is associated with the TBK Tracker, a secure student/course management program for native computer based training applications. The bak file contains deleted course INI file.
No further information could be found.
Software applications that handle other tasks involving bak files:
Microsoft Windows
File type category:
Backup file
Date updated: April 6, 2017
The bak file extension is associated with the TED5 (Tile Editor v5.0), a level editor for various games developed by id Software.
The bak file stores backup of level created in TED5. These backup files are carmackized (use Carmack compression, developed by John Carmack from id Software).
Use TED5 to work with *.bak files.
Conversion to other formats is not possible.
File type category:
Backup file
Date updated: June 1, 2018
The bak file extension is associated with the THEOS Corona operating system, developed by THEOS Software Corporation.
The bak file contains backup of the text file.
No further information could be found.
Software applications that can open bak files:
Other operating systems or devices
Software apps that create bak files:
Other operating systems or devices
Software apps that backup bak files:
Other operating systems or devices
File type category:
Backup file
Date updated: March 26, 2018
Record marked as obsolete and not updated for a long time.
The bak file extension is related to the Visual UML, UML modeling software for Microsoft Windows operating system.
The bak file stores backup of document created in the Visual UML.
Unified Modeling Language (UML) is a visual language for specifying, constructing, and documenting the artifacts of systems.
Use Visual UML to work with *.bak files.
Software applications that can open bak files:
Microsoft Windows
Software apps that create bak files:
Microsoft Windows
Software apps that backup bak files:
Microsoft Windows
File type category:
Various data file
Date updated: July 12, 2018
Record marked as obsolete and not updated for a long time.
The bak file extension is associated with the VoCATS (Vocational Competency Achievement Tracking System).
the bak file contains backup of a modified test.
Most likely some old format without support. No further information could be found.
Use compatible tools to work with *.bak files.
Software applications that can open bak files:
Microsoft Windows
VoCATS
Software apps that create bak files:
Microsoft Windows
VoCATS
Software apps that backup bak files:
Microsoft Windows
VoCATS
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