Home : File Types : UDF File (2 File Associations)

.UDF File Extension

File Type 1Universal Disk Format File

DeveloperOptical Storage Technology Association
3.6 (14 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryDisk Image Files


This file is saved in a binary format, which requires a specific program to read its contents.

What is a UDF file?

File created in the Universal Disk Format (UDF), a disc imaging format used for storing files on optical media; stores a collection of files using the directory structure specified in the UDF standard; can be used for burning DVDs, CDs, and other optical media; allows files to be deleted and modified on the target disc even after they have been written.

More Information

The UDF standard is developed and maintained by the Optical Storage Technology Association (OSTA).

NOTE: Even though the UDF format is commonly used, the ".udf" extension is not. Instead, disc burning applications typically save images in their own formats and then burn them using the UDF standard.

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Programs that open UDF files
Nero 2016
Roxio Toast 15
Roxio Popcorn
Updated 11/20/2012

File Type 2Excel User Defined Function

2.8 (6 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryExecutable Files


This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

.UDF File Association 2

User-defined script written or recorded in Visual Basic that executes a function in Microsoft Excel; can be created by selecting "Module" from the Insert menu in Excel.

Programs that open UDF files
Microsoft Excel 2016
Microsoft Excel 2016
Updated 12/16/2006

.UDF Extension Information

This page contains information about the file extension UDF and its known file associations. Our goal is to help you understand what a *.udf file is and how to open it.

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