UDF File Type

- The quick facts

What are UDF files and how to open them

Are you having problems opening an UDF file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is an UDF file?

UDF files have multiple uses, and User Defined Function for Excel is one of them.

User Defined Function for Excel

Also known as user-defined function files, these UDF files are generated by Microsoft Excel when users create custom formulas for their spreadsheet documents. Microsoft Excel provides VBA (Visual Basic for Applications) support. This allows users to develop custom functions and formulas for their spreadsheets.

Users can access previously saved formulas and functions through these UDF files to use them across multiple spreadsheets without the need to code the functions and formulas again manually. The content of a .udf file is used by Microsoft Excel whenever a user opens and edits a spreadsheet with custom functions and formulas that have been saved in the UDF file. The data in a .udf file is also updated by Microsoft Excel when the user changes the saved formulas and functions of the spreadsheet.

How to open UDF files

We have identified one UDF opener that is compatible with this specific type of UDF file.

Programs that open User Defined Function for Excel files

Microsoft ExcelMicrosoft ExcelVerified

Last updated: May 31, 2022

More file formats using the UDF extension

Through our research of UDF files, we know that the following formats exist. However, we have not yet analyzed them in detail, and we would love to hear from you if you have information about either of them.

Universal Data Format

X-ray diffraction data file format

Various apps that use files with this extension

These apps are known to open certain types of UDF files. Remember, different programs may use UDF files for different purposes, so you may need to try out a few of them to be able to open your specific file.

IsoBusterIsoBusterUser submitted
PeaZipPeaZipUser submitted
BandizipBandizipUser submitted
Hamster Lite ArchiverHamster Lite ArchiverUser submitted
Hamster Free ArchiverHamster Free ArchiverUser submitted
Hamster Free ZIP ArchiverHamster Free ZIP ArchiverUser submitted
progeCAD ProfessionalprogeCAD ProfessionalUser submitted
PIExpert ApplicationPIExpert ApplicationUser submitted
Free Zip OpenerFree Zip OpenerUser submitted
TimetableTimetableUser submitted