A daily updated filename extension database!

BK file extension

The table below provides useful information about the .bk file extension. It answers questions such as:

  • What is the .bk file?
  • What program do I need to open a .bk file?
  • How can the .bk file be opened, edited or printed?
  • How can I convert .bk files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

0 extension(s) and 1 alias(es) found in database

✅ Backup Copy File

BAK file is a Backup Copy file. The .BAK is a filename extension commonly used to signify a backup copy of a file.
BAK format description not yet available
Category: Other files
Application: -
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
BAK aliases:
backup, bk, old, ori, orig, ren
BAK related links:
BAK related extensions:
Windows Backup Catalog

HP OpenVMS Backup File

Windows Backup Verify File

HP OpenVMS Help Library

HP OpenVMS Macro Library

HP OpenVMS Text Library

HP OpenVMS ACL Editor Journal Data

HP OpenVMS List Data

Other types of files may also use the .bk file extension.

🚫 The .bk file extension is often given incorrectly!

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

bj, bl, bm, bo, bu, gk, hk, kb, nk

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Sound Forge Batch Job
ASCA GIS Housekeeping Data
Binary Linework TIFF Image
Borland C++ Keyboard Script
BSC Intermediate Object
NUKE Script
Pegasus Mail BU File
X Bitmap Image
SAP Business One BackUp Data
Commodore 128 VDC BitMap Image

🔴 Can't open a .bk 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .bk file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .bk file extension, write to us!

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