Having problems opening a DIAGCAB file?

We have programs that can open or convert your DIAGCAB files.

Opening DIAGCAB files

Did your computer fail to open a DIAGCAB file? We explain what DIAGCAB files are and recommend software that we know can open or convert your DIAGCAB files.

What is a DIAGCAB file?

The DIAGCAB file format was developed by Microsoft as a data and archive file format for Windows Vista, 7, 8 and 10. These .diagcab files are generated by the makecab tool, which is a Windows application that's built into these Windows OS versions. The data stored in a DIAGCAB file can be viewed by 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 was 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.Similar to a CAB file, a .diagcab file may contain multiple resources and multimedia content items. It's best to leave these DIAGCAB files alone, in order to ensure that the Windows Troubleshooting service and the Microsoft Support Diagnostic Tool can properly access the resources and data stored in these .diagcab files when needed.

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About File Extension DIAGCAB

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the DIAGCAB file format or software that uses files with the DIAGCAB suffix, please do get in touch - we would love hearing from you.