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.udf
Not to be confused with .UDF or .iso or .ISO
MIME type: application/x-udf9660-image
Is binary? Yes
Is encrypted? Sometimes
Can execute dangerous code? Yes (example: malware on a CD)
Related extensions: .udf .vfd .VFC .udf .UDF .img .IMG
Internet Media types: None
Uniform Type Identifier (UTI) public.udf-image
Type code ????
Magic number CD001 32769 NSR0 38913 or 32769
The capital doesn't differentiate the 2 files by much. They both still function the same.
A .udf file is a Universal Disk Format (UDF) optical disk image file. It contains the raw contents of a CD image in a digital format. It is a common file format. Some notable uses include installing software, listening to music, installing an operating system in a virtual machine/host machine, and more. This file extension is not to be confused with the file system that runs on it, known as UDF.
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Any (Windows, Windows 9x, Windows NT, Linux, GNU/Linux, Classic MacOS, MacOS, MacOS X, OS X, iOS, Android, OS/2, ChromiumOS, ChromeOS, Solaris, FreeBSL, NetBSD, OpenBSD, DragonflyBSD, etc.)
Opens with:
Operating System
VirtualBox
VMWare
Qemu
SheepShaver
Microsoft Virtual PC
Microsoft Hyper-V
VLC Media Player
QuickTime
CyberLink Media Suite
Other/Suggest one
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Definition 1: UDF Optical Disk Image file
A .udf file is a Universal Disk Format (UDF) optical disk image file. It contains the raw contents of a CD image in a digital format. It is a common file format. Some notable uses include installing software, listening to music, installing an operating system in a virtual machine/host machine, and more. This file extension is not to be confused with the file system that runs on it, known as UDF.
Definition 2: Pseudo-extension (null)
A pseudo-extension is a file format that is applied to a file, despite not having a purpose, other than to change the file name (such as STANDARDS.udf) however this file extension is rarely used as a pseudo-extension
Alternatives
ISO
VFD
IMG
DMG
ROM
No other definitions
Limitations and problems
Unknown
History
No history to show. Maintainers of this project should add a history of the format here.
Version history
There are only ? versions of the udf file.
The following table needs to be reformatted.
Usage
udf files are used to install/use software
udf files are used to play music
udf files are used as Live CD images for trying out a Linux distribution without installing it.
No other definitions
Shebang? Unknown
Encoding: Unknown
File icon
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GNOME 1: 
GNOME 2: 
GNOME 3: 
GNOME 40: 
GNOME 41: 
KDE 1: 
KDE 2: 
KDE 3: 
KDE 4: 
KDE 5: 
XFCE: 
LXQT: 
CINNAMON: 
Common Desktop Environment (CDE): 
MacOS (Classic): 
MacOS (Mac OS X): 
MacOS (OS X): 
MacOS (MacOS 10.10-10.12): 
MacOS (Modern, pre-MacOS11): 
MacOS (Modern, MacOS11): 
WinRAR: 
Android: 
iOS: 
Windows (DOS): 
Windows (9x): 
Windows (NT): 
Solaris: 