DIAGCAB File - opening and understanding
Did your computer fail to open a DIAGCAB file? We explain what they are used for and recommend software that we know can open or otherwise handle your .DIAGCAB files.
What is a DIAGCAB file?
A .DIAGCAB file is a Diagnostic Cabinet file. Microsoft developed the DIAGCAB file format as a data and archive file format for Windows Vista, 7, 8, and 10. These .diagcab files are generated by the makecab tool, a Windows application built into these Windows OS versions. The data stored in a DIAGCAB file can be viewed using the Microsoft Support Diagnostic Tool, which is another application that's also available in these Windows OS versions.
The Windows Troubleshooting service uses these .diagcab files, which were introduced in Windows Vista. This application assists users in detecting problems and repairing system issues. This can also be used to send error logs and reports to Microsoft servers for analysis.
How to open DIAGCAB files
You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension DIAGCAB for different purposes.
While we have not verified the apps ourselves yet, our users have suggested 1 different DIAGCAB openers which you will find listed below.
Suggest another file format using extension DIAGCAB
While we know of one file format using the .DIAGCAB file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .DIAGCAB file.
Various viewers for this file format
These apps are known to open certain types of DIAGCAB files. Remember, different programs may use DIAGCAB files for different purposes, so you may need to try out a few of them to be able to open your specific file.