COSESSIONDB file format description

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

1 filename extension(s) found in our database.

.cosessiondb - Capture One Session Database

The COSESSIONDB data files are related to Capture One. The COSESSIONDB file is a Capture One Session Database. Capture One is a photo editing software developed by Phase One.

Capture One
Data files
- / -
Capture One Session Database related extensions:
Huelix Audio Converter Session Information
Pegasus Mail Address Book Data
Navicat for MariaDB Batch Job
Pegasus Mail Attachment Data
Haltech ECU Fuel and Ignition Map
LabVIEW Virtual Instrument Template

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

Can't open a .cosessiondb 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.

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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