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Basic information about SESSION file

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

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


1.Detail information about SESSION file extension: CATIA 4 Session File

File type CATIA 4 Session File Category 3D Image Files
Developer Dassault Systemes File format Binary
Description SESSION file is a CATIA 4 Session File developed by Dassault Systemes. Session file created by CATIA version 4, a program used for 3D product design and simulation; contains references to .MODEL files or copies of MODEL files, depending on the save option selected; used to save models from a work session.
Software programs that will open, edit or convert SESSION files

Windows		 Dassault Systemes CATIA
Okino Computer Graphics PolyTrans
Adobe Acrobat DC

macOS		 Adobe Acrobat DC


2.Detail information about SESSION file extension: Mozilla Firefox Session File

File type Mozilla Firefox Session File Category Text Files
Developer Zeniko File format N/A
Description SESSION file is a Mozilla Firefox Session File developed by Zeniko.
Software programs that will open, edit or convert SESSION files

Web		 Mozilla Firefox
Session Manager



Can't open a SESSION 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.SESSION”。

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 SESSION extension without any issue.


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

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

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

If the SESSION 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.