CK9 file format description

Many people share .ck9 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ck9 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ck9 files.

1 filename extension(s) found in our database.

.ck9 - Cook'n Cookbook Backup

The CK9 data files are related to Cook'n Cookbook. The CK9 file is a Cook'n Cookbook Backup.

Cook'n Cookbook
Data files
- / -
Cook'n Cookbook Backup related extensions:
JetForm FormFlow 99 Form Data
PlayStation Network Downloader Data
KeyTruss Truss Data
Visilogic Utilities Data Table
forScore Metadata
Autodesk Simulation Mechanical DDAM Displacement Results Data

Naturally, other applications may also use the .ck9 file extension. Even harmful programs can create .ck9 files. Be especially cautious with .ck9 files coming from an unknown source!

Can't open a .ck9 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 .ck9 file extension is often given incorrectly!

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

ck, cki, cko, ckp, k9

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

PSI-BLAST Checkpoint Profile Data
Microsoft SQL Server Checkpoint Data
Off by One Web Browser Cookie Data
Ansys Chemkin Kinetic Data
DataFlex Index
ChucK Source Code

Operating systems 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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If you have useful information about the .ck9 file format, then write to us! >> CK9 file