BK1 file format description

Many people share .bk1 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .bk1 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .bk1 files.

5 filename extension(s) found in our database.

.bk1 - FlashGet Database Backup

The BK1 data files are related to FlashGet. The BK1 file is a FlashGet Database Backup. JCD is FlashGet's download database file. FlashGet backs up JCD file every day. The backed-up files are named default.bk1, default.bk2, and default.bk3.

Data files
- / -
bk2, bk3, bk4
FlashGet Database Backup related extensions:
FlashGet Unfinished File
FlashGet Partial Download
FlashGet Incomplete Download
FlashGet Download Database

.bk1 - Windows Indexing Service Data

The BK1 data files are related to Microsoft Windows. The BK1 file is a Windows Indexing Service Data. The Windows Indexing is a Windows service that is designed to index all of the files on your computer into a database.

Microsoft Windows
Data files
- / -
Windows Indexing Service Data related extensions:
NeuroExplorer Data
Moho Style Data
Adobe Illustrator for Mac Data
Intuit TurboTax 2008 Tax Return Data
4D Database for Mac Label Editor Data
Altair FEKO Femap Geometrical Data

.bk1 - CA ERwin Data Modeler Backup

The BK1 data files are related to CA ERwin Data Modeler. The BK1 file is a CA ERwin Data Modeler Backup. CA ERwin Data Modeler (ERwin) is a software tool for data modeling (data requirements analysis, database design etc) of custom developed information systems, including databases of transactional systems and data marts.

CA ERwin Data Modeler
Data files
- / -
CA ERwin Data Modeler Backup related extensions:
Alternativa3D Exported Data
Sony PlayStation 3 Game Icon
Rigs of Rods Sound Script Data
Bitdefender Antivirus Database
BrainVoyager QX Slice Positioning Data
DESQview ADL Data

.bk0 - Aspen HYSYS Backup File

The BK0 data files are related to Aspen HYSYS. The BK0 file is an Aspen HYSYS Backup File. Aspen HYSYS is a process modeling tool for conceptual design, optimization, business planning, asset management, and performance monitoring for oil & gas production, gas processing, petroleum refining, and air separation industries.

Data files
- / -
bk1, bk2
Aspen HYSYS Backup File related extensions:
Alzex Personal Finance Data
Adventure Maker Plugin
Autodesk AutoCAD Drawing Lock
SAM Transition Regularizer Data
I-DEAS Master Drafting Machine Data
RootsMagic v4 Database Backup

.bk! - Corel WordPerfect Document Backup

The BK! document files are related to Corel WordPerfect. The BK! file is a Corel WordPerfect Document Backup. Corel WordPerfect is a popular, fully-featured commercial word processor program.

Corel WordPerfect
Document files
- / -
bk1, bk2, bk3, bk4, bk5, bk6, bk7, bk8, bk9, bkn
Corel WordPerfect Document Backup related extensions:
Sealed PowerPoint Template
Microsoft Encarta Document
Compressed GEDCOM Document
Spartan Document
Adobe Director Compressed Cast
Microsoft Office 2007 Relationships Data

Naturally, other applications may also use the .bk1 file extension. Even harmful programs can create .bk1 files. Be especially cautious with .bk1 files coming from an unknown source!

Can't open a .bk1 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .bk1 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

b1, bk, bkl, bkw, bl1, bm1, bo1, k1

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Magnavox Odyssey 1 Emulator Overlay Image
KeyCarbon Binary Keystroke Log
DataFlex Index
WebDev Window Backup Data
One Must Fall 2097 Game Data
Backup Copy File

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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DataTypes.net >> BK1 file