How to Edit a UDF File

UDF files are executable files that are mainly associated with Microsoft Excel, according to FILExt, an online database of file extensions. UDF stand for "User-Defined File," which means that the file is a user-defined script that can be written or recorded. You can create, open and edit UDF files with Microsoft Excel.

Step 1

Right-click on the UDF file.

Step 2

Click on "Open with."

Step 3

Select the "Choose Default Program" option.

Step 4

Select Microsoft Excel.

Step 5

Click on "Browse" only if Microsoft Excel is not on the list. Then, search for it and click on "Open."

Step 6

Click on "OK." Your UDF file will open.

Step 7

Click on "File."

Step 8

Click on "Save as."

Step 9

Select the file extension you wish to convert the UDF file to.

Step 10

Click on "Save." Your UDF has been edited.

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