UDF drivers are tiny programs that enable your UDF hardware to communicate with your operating system software. Maintaining updated UDF software prevents crashes and maximizes hardware and system performance. Using outdated or corrupt UDF drivers can cause system errors, crashes, and cause your computer or hardware to fail.
Did your computer fail to open an UDF file? We explain what UDF files are and recommend software that we know can open or convert your UDF files.What is an UDF file?
The .udf file extension is used for a program configuration file format that was developed by Microsoft. 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, which are stored in a UDF file.Users can access previously saved formulas and functions through these UDF files, in order to use it across multiple spreadsheets without the need to manually code the functions and formulas again. 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 makes changes to the saved formulas and functions of the spreadsheet.
Software that will open, convert or fix UDF files
Try a universal file viewer
Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.
About File Extension UDFFile.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 UDF file format or software that uses files with the UDF suffix, please do get in touch - we would love hearing from you.
A file with the UDF file extension is most likely either a Universal Disk Format file or an Excel User Defined Function file.
UDF is a common file system used by optical media burning programs to store files on discs, so the actual UDF file extension (.UDF) might not be as prevalent. Instead, even though the program that does the burning will do so using the UDF standard, it most likely associates the file with itself by appending a different file extension to the end of the file name.
Some UDF files may instead be Excel User Defined Functions created by Microsoft Excel that will execute certain predefined functions when opened. Others could be Ricoh address books that hold user information.
UDF is also an acronym for some unrelated technology terms like uniqueness database file, user-defined feature, user-defined font, and ultra-deep field.
How to Open a UDF File
Universal Disk Format files that have the UDF extension can be opened using Nero or a file unzip utility like PeaZip or 7-Zip.
UDF scripts that are Excel User Defined Functions are created and used by Microsoft Excel via its built-in Microsoft Visual Basic for Applications tool. This is accessible through the Alt+F11 shortcut in Excel but the actual script content probably doesn't exist with the .UDF file extension, but is instead stored within Excel.
UDF files that are Ricoh address book files require the now discontinued SmartDeviceMonitor for Admin software from Ricoh. You might be able to open the UDF file with their newer Device Manager NX Lite tool or with the older SmartDeviceMonitor for Admin, which you can find on Softpedia.
UDF files in MS Excel have the potential to store malicious scripts. Take great care when opening executable file formats like this that you've received via email or downloaded from websites you're not familiar with. See our List of Executable File Extensions for a listing of file extensions to avoid and why.
Use Notepad or another text editor to open the UDF file. Many files are text-only files meaning no matter the file extension, a text editor may be able to properly display the file's contents. This may or may not be the case with UDF files but it's worth a try.
How to Convert a UDF File
While the UDF format is widely used for storing data on discs, converting the file format to a media file format is not how you want to go about this. For example, if you want to 'convert' UDF to MP4 or ISO, it's best to use a video file converter or a DVD ripping program.
Consider a disc that you want to be saved as an ISO or in a video format like MPEG. The best way to get this done if you need the data in the ISO format is to use a program like BurnAware.
Need your UDF content to be in a video file format? You can rip the content off of a disc and store it in a playable video format like MP4 or AVI, using a program like Freemake Video Converter.
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To convert UDF to CSV, if you have a Ricoh address book file, requires the SmartDeviceMonitor for Admin software from Ricoh. As mentioned above, that software is no longer available from Ricoh but you might be able to use it normally from the Softpedia link above, or with the Device Manager NX Lite program.
If you're looking for a file system converter that can convert UDF to NTFS or FAT32, for example, try formatting the partition with Disk Management. Keep in mind that some devices will not support every possible file system.
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Still Can't Open Your File?
If your file doesn't open as described above, then it's most likely not a Universal Disk Format file or an Excel User Define Function file. Instead, you probably have a file that doesn't really end with the '.UDF' file extension but instead something that just looks similar.
For example, the PDF file format is really popular and is spelled in almost the exact same way as .UDF. However, PDf files cannot open with UDF openers, and UDF file will not open in PDF viewers.
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The same concept applies with many other file format and file extension, like UD files that are OmniPage User Dictionary files that are used with the OmniPage software; DAZ User files that use the DUF suffix; and MagicISO's Universal Image Format that utilizes the UIF file extension.
Udf File System Driver
The point here is to double-check the file extension if you can't open your UDF file. There's a good chance that you're dealing with a similarly spelled, but entirely different file format that should be treated as such. Research the file extension of your specific file to find which programs can open or convert the file.
