File Type 1 Media Disc Image File IconMedia Disc Image File
File Format Standard (developed by Alcohol Software)
Usage Referenced by an application; not meant to be opened manually; may run a program or script when opened
Popularity ★ ★ ★ ★ ★  Popular

An MDF file is a disc image created with a disc authoring utility. It contains the exact contents of CD or DVD and can be used to make multiple copies of discs.

MDF files are often created by Alcohol 120% software, but they may be opened by several other disc authoring programs as well.

Info About Alcohol Software Alcohol 120%

Alcohol 120% is a CD and DVD disc burning program for Windows. It is commonly used to create copies and backups of discs or to store CDs as disc images on your computer. The program includes a pre-mastering function and supports Blu-ray discs. Alcohol 120% has many applications, including home, school, and business use.

Open With

IconAlcohol 120

IconCyberLink PowerDVD


Updated August 10, 2009
File Type 2 Generic IconTranslation Memory Data Find File
File Format Proprietary (SDL)
Usage Referenced by an application; not meant to be opened manually
Popularity ★ ★ ★ ☆ ☆  Average

Supporting file for a translation memory used by Trados translation software; enables fast look up of data within the translation memory.

A translation memory (TM) includes five file types including MDF, .TMW, .IIX, .MTF, and .MWF files.

Open With

IconSDL Trados

Updated 2007
File Type 3 SQL Server Database File IconSQL Server Database File
File Format Proprietary (Microsoft)
Usage Runs when opened
Popularity ★ ★ ★ ★ ☆  Common

Primary database file format used by Microsoft SQL Server, an enterprise-level database program; used for database files installed with SQL Server and related add-ons; custom MDF files may also be created by the user.

Open With

IconMicrosoft SQL Server

IconMicrosoft Visual Studio

IconAryson SQL Database Recovery

Updated 2007
File Type 4 Generic IconMeasurement Data Format File
File Format Standard (developed by Vector)
Usage Open manually
Popularity ★ ★ ★ ☆ ☆  Average

Standard file format used by the automotive industry for storing measurement data; contains raw measurement data from a measurement and the metadata necessary to interpret the raw data.

Open With

IconVector CANape

IconVector MDF Validator

IconNational Instruments DIAdem

Updated July 10, 2014
Information from the PC File Extensions Reference