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Basic information about COS file

When there is a problem with opening files with the file extension COS（*.COS or *.cos）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the COS file yourself.

There are 2 file types using the COS file extension in our database. In the further part of this page, you will find detail information about all the COS file with their brief description and a list of programs that support COS file sorted by operating systems. The table below provides useful information about the COS file extension. It answers questions such as:
  • What is the COS file?
  • How to open a COS file?
  • What programs do I need to open a COS file?
  • What programs help to create and edit a COS file?
  • How to convert COS files to another file format?
  • How to convert another files to COS file format?


1.Detail information about COS file extension: Capture One Settings File

File type Capture One Settings File Category Settings Files
Developer Phase One File format Binary
Description COS file is a Capture One Settings File developed by Phase One. Image settings file created by Capture One, a program used for editing and organizing digital photos; saves image adjustments (exposure, color temperature, white balance, etc.) and other nondestructive edits for a photo.
Software programs that will open, edit or convert COS files

Windows		 Phase One Capture One

macOS		 Phase One Capture One


2.Detail information about COS file extension: Creatures CAOS File

File type Creatures CAOS File Category Game Files
Developer Creature Labs File format Text
Description COS file is a Creatures CAOS File developed by Creature Labs.
Software programs that will open, edit or convert COS files

Windows		 Creature Labs Creatures



Can't open a COS file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.COS”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the COS extension without any issue.


Where I can download the application that support COS file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of COS 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/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a COS file?

The reasons for the lack of the ability to open a COS file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a COS file. If there is still something wrong, you might want to check:

  • Whether the COS file is damaged.
  • Whether the COS file is incorrectly linked in the registry entries.
  • Whether the COS file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the COS file format is incompletely.
  • Whether the COS file is infected.
  • Whether the drivers of the equipment used for opening a COS file are up to date.
  • Whether your computer has enough hardware resources to open a COS file.

If the COS file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.