The File Extensions Database

.MX File Extension

  • Developer by: Wolfram Research
  • Category: Data Files
  • Format: Binary

What is an .MX file?

.MX is Mathematica Serialized Package File

Binary package created by Mathematica, a desktop application used for computation and visualization; stores Mathematica expressions in a proprietary serialized format, which is optimized for fast loading; used for distributing Mathematica packages.

Mathematica packages can be created using DumpSave and read using Get. They can also be imported using the Import command and exported using the Export command. For example, Import[""] reads the MX file and returns an expression. Similarly, Export["", expr] serializes the "expr" expression and saves it to an MX file.

Since MX files are saved in a binary format, they are non-human readable. Additionally, they cannot be shared between different versions of Mathematica or between installations of Mathematica on different operating systems.

Programs that open Mathematica Serialized Package File
Wolfram Research Mathematica
Wolfram Research Mathematica

How to solve problems with MX files

  • Associate the MX file extension with the correct application. On :
    Windows: Right click on any MX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.MX files". Mac: Right click (or Ctrl-click) the MX 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 .MX is Mathematica Serialized Package File. Because only the current version supports the latest MX file format. Search, therefore, e.g. on the Wolfram Research manufacturer website after an available .MX is Mathematica Serialized Package File update.
  • To make sure that your MX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.