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2 File Associations

.UDF File Extension

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Universal Disk Format File Icon
File TypeUniversal Disk Format File
DeveloperOptical Storage Technology Association
3.9 (7 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryDisk Image Files
File Format Description

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.

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.

Program(s) that open .UDF files
Updated 11/20/2012

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File Type
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Excel User Defined Function
1.0 (1 Vote) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryExecutable Files
File Format Description

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.

Program(s) that open .UDF files
Updated 12/16/2006