A daily updated filename extension database!

CKO file extension

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

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

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

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

✅ ChessBase Key Openings

CKO file is a ChessBase Key Openings. ChessBase is a personal, stand-alone chess database.
Category: Game Data files
Application: ChessBase
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CKO aliases:
CKO related links:
CKO 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

✅ Kokogut C Output File

CKO file is a Kokogut C Output File. Kokogut is an implementation of Kogut in Kogut itself. It translates Kogut source into C source, which is then compiled using a C compiler to produce an excecutable. Kogut is an experimental programming language which supports impurely functional programming and a non-traditional flavor of object-oriented programming.
CKO format description not yet available
Application: Kokogut
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
CKO aliases:
CKO related links:
CKO related extensions:
Kokogut Compiler Options File

Kokogut Module Interface File

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

🚫 The .cko file extension is often given incorrectly!

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

co, ckl, kco, ck, ko, dko, coo, clo, sko, cuo, cok, cmo, ckp

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

DISA STIG Checklist
Kwalitan Codes Data
Cult3D Object
ChucK Source Code
Linux 2.6 Kernel Object
Carmageddon Game Data
Sage Accounting Executable
Tajima Embroidery Data File
PSI-BLAST Checkpoint Profile Data
CUDA Object

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

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