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Basic information about COSESSIONDB file

When there is a problem with opening files with the file extension COSESSIONDB（*.COSESSIONDB or *.cosessiondb）, 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 COSESSIONDB file yourself.

There are 1 file types using the COSESSIONDB file extension in our database. In the further part of this page, you will find detail information about all the COSESSIONDB file with their brief description and a list of programs that support COSESSIONDB file sorted by operating systems. The table below provides useful information about the COSESSIONDB file extension. It answers questions such as:
  • What is the COSESSIONDB file?
  • How to open a COSESSIONDB file?
  • What programs do I need to open a COSESSIONDB file?
  • What programs help to create and edit a COSESSIONDB file?
  • How to convert COSESSIONDB files to another file format?
  • How to convert another files to COSESSIONDB file format?


1.Detail information about COSESSIONDB file extension: Capture One Session File

File type Capture One Session File Category Data Files
Developer Phase One File format Binary
Description COSESSIONDB file is a Capture One Session File developed by Phase One. A COSESSIONDB file is a session file created by Capture One, a program used for managing digital photos. It stores a collection of photos that have been selected by the user and organized as an album. COSESSIONDB files are used to organize your work as a project.
Software programs that will open, edit or convert COSESSIONDB files

Windows		 Phase One Capture One

macOS		 Phase One Capture One



Can't open a COSESSIONDB 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.COSESSIONDB”。

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 COSESSIONDB extension without any issue.


Where I can download the application that support COSESSIONDB 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 COSESSIONDB 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 COSESSIONDB file?

The reasons for the lack of the ability to open a COSESSIONDB 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 COSESSIONDB file. If there is still something wrong, you might want to check:

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

If the COSESSIONDB 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.