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CK3 file extension

The table below provides useful information about the .ck3 file extension. It answers questions such as:

  • What is the .ck3 file?
  • What program do I need to open a .ck3 file?
  • How can the .ck3 file be opened, edited or printed?
  • How can I convert .ck3 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 Endgame Key Data

CK3 file is a ChessBase Endgame Key Data. ChessBase is a personal, stand-alone chess database.
CK3 format description not yet available
Category: Game Data files
Application: ChessBase
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CK3 aliases:
CK3 related links:
CK3 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

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 .ck3 file extension.

🚫 The .ck3 file extension is often given incorrectly!

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

c3, ck, ckw, cl3, cm3, cu3, k3

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Eudemons Online 3D Model
DataFlex Index
ChucK Source Code
Unknown CKW File
Easy CD Creator 3 Cover Layout
CaseMap 3 Data
PhotoLine 4 Curve Data

🔴 Can't open a .ck3 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 .ck3 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 .ck3 file extension, write to us!

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