File Extension UDF

  • Full name
    Universal Disk Format
  • Developer
    Optical Storage Technology Association
  • Popularity
Have you encountered a problem with a UDF file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a UDF file here. In the further part of this page we have added a list of programs that should open your UDF file. It is enough you choose a proper application for your operating system, download and install it.


Files with the extension UDF contain user-defined functions, ie Excel user-defined functions of the spreadsheet. Microsoft Excel allows the user to generate their own functions and use them as the built-in. Visual Basic for Applications (VBA) is available for programming these functions.

In order to be able to use the functions in other workbooks or tables, saving as UDF file offers itself.

Programs which can open a UDF file

How to open a UDF file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the UDF file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a UDF file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support UDF files. At this point we are looking for disk space where the application was installed in and we can link it with a UDF file. Since then, our operating system will use the selected program to support all UDF files.

Other issues

Despite the described problem with UDF there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the UDF file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the UDF file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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