The File Extensions Database

.MDF File Extension

  • Developer by: Microsoft
  • Category: Database Files

What is an .MDF file?

.MDF is SQL Server Database File

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.

Programs that open SQL Server Database File
Microsoft SQL Server 2016
Microsoft Visual Studio 2017
Aryson SQL Database Recovery
File Type 2 Media Disc Image File
Developer by: Alcohol Software Category: Disk Image Files

An MDF file is a disc image saved by a disc authoring program such as Alcohol 120%. It stores the actual CD or DVD disc data, while the header and track information is stored in a corresponding .MDS file. MDF files are similar to .ISO files, but are saved in a different format.

MDF files may also be accompanied by .MDS files, which contain metadata about the MDF files. they include information, such as where the disc layers begin and end and copyright information.

Programs that open Media Disc Image File
Alcohol 120%
CyberLink PowerDVD 17
Smart Projects IsoBuster
WinMount International WinMount
DT Soft DAEMON Tools
H+H Software Virtual CD
File Type 3 Measurement Data Format File
Developer by: Vector Category: Data Files Format: Binary

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.

NOTE: The Vector MDF Validator is used for validating MDF files.

Programs that open Measurement Data Format File
Vector CANape
Vector CANgraph
Vector MDF Validator
National Instruments DIAdem
File Type 4 Translation Memory Data Find File
Developer by: SDL Category: Misc Files

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.

How to solve problems with MDF files

  • Associate the MDF file extension with the correct application. On :
    Windows: Right click on any MDF file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.MDF files". Mac: Right click (or Ctrl-click) the MDF file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .MDF is SQL Server Database File. Because only the current version supports the latest MDF file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .MDF is SQL Server Database File update.
  • To make sure that your MDF file is not corrupted or virus-infected, get the file again and scan it with antivirus software.