A daily updated filename extension database!

CK2 file extension

The table below provides useful information about the .ck2 file extension. It answers questions such as:

  • What is the .ck2 file?
  • What program do I need to open a .ck2 file?
  • How can the .ck2 file be opened, edited or printed?
  • How can I convert .ck2 files to another format?

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

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

✅ ChessBase Strategy Key Data

ChessBase Strategy Key Data .ck2 file icon
CK2 file is a ChessBase Strategy Key Data. ChessBase is a personal, stand-alone chess database.
CK2 format description not yet available
Category: Game Data files
Application: ChessBase
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CK2 aliases:
CK2 related links:
CK2 related extensions:
ChessBase Archived Database

ChessBase Game Moves Data

ChessBase Database Header

ChessBase Annotations

ChessBase Players Index

ChessBase Tournament Index

ChessBase Commentators Index

ChessBase Source Index

ChessBase Team Index

ChessBase Second Header Data

✅ Commander Keen Data File

Commander Keen Data File .ck1 file icon
CK1 file is a Commander Keen Data File. Commander Keen is a series of video games developed by id Software in the early 1990s.
CK1 format description not yet available
Category: Game Data files
Application: Commander Keen
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CK1 aliases:
ck2, ck3, ck4, ck5, ck6
CK1 related links:
CK1 related extensions:

Other types of files may also use the .ck2 file extension.

🚫 The .ck2 file extension is often given incorrectly!

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

c2, c2k, ck, ckw, ckz, cl2, cm2, co2, k2, kc2, sk2

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Atari ST Paintworks Image
Poser Camera Data
Microsoft Project Holidays Data
DataFlex Index
AquaCrop Atmospheric CO2 Data
ChucK Source Code
Kodak DCS200 RAW Image
Unknown CKW File
ACD/ChemSketch Drawing Document
QuickSFV Checksum Database

🔴 Can't open a .ck2 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 .ck2 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 .ck2 file extension, write to us!

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