MS-DOS extender data
File type: Various data file
An emx file contains data used by an MS-DOS extender on IBM PC-compatible computers. It belongs to the Microsoft MS-DOS software environment.
Found 4 different file type records with the same emx filename suffix.
File type category:
Various data file
Date updated: October 16, 2026
Record marked as obsolete and not updated for a long time.
The emx file extension is associated with the Microsoft MS-DOS operating system for IBM PC-compatible computers.
An emx file stores extender-related data used by an MS-DOS program or its extender component. It is supporting data for that software and is not normally intended for direct editing.
MS-DOS was developed by Microsoft for personal computers and was later superseded by Microsoft Windows. The operating system and this file format are obsolete, and Microsoft no longer supports MS-DOS.
Use the emx file with the MS-DOS extender or other MS-DOS software that requires it. The associated program may load the file automatically from the expected location.
Modern Windows and other operating systems generally do not open this file as a standalone document. An original MS-DOS environment or compatible DOS emulation may be required.
An emx file is supporting data for an MS-DOS extender, so it normally has no useful standalone conversion format. It should be kept with the MS-DOS software that uses it.
Software applications that handle other tasks involving emx files:
Microsoft MS-DOS
File type category:
Various data file
Date updated: May 30, 2018
The emx file extension is also related to the eMusic music management and playback software .
The emx file used in eMusic contains information for music artist, album, and album art.
You can work with these files using eMusic.
Probably cannot be converted to anything else.
File type category:
Game file
Date updated: September 22, 2026
The emx file format is associated with EnigmaCross, developed by Sam Bellotto Jr. The format is used for saving and loading puzzles created or opened in the program.
EnigmaCross is Microsoft Windows software, and the emx format is intended for use within that application.
Open an emx file with EnigmaCross on Microsoft Windows. Use the program's Open command and select the file.
Open the file in EnigmaCross and use any export or Save As options provided by the program if a different output format is required.
Software applications that handle other tasks involving emx files:
Microsoft Windows
EnigmaCross
File type category:
Various data file
Date updated: October 16, 2026
IBM Rational Software Architect is IBM software for designing, modeling, and developing software systems. It supports software architecture and visual modeling as part of an end-to-end development process.
An emx file stores model information created in Rational Software Architect, including the definitions and design relationships that make up a software model. It is an application-specific model file used within RSA projects.
The file is intended to be used with IBM Rational Software Architect on platforms supported by the application. The format may not transfer completely to other modeling tools.
Open the EMX file with IBM Rational Software Architect on a supported platform. The file may be associated with an RSA project or workspace.
If the file does not open directly, use RSA's project import or model-opening commands.
Open the model in IBM Rational Software Architect and use its model export facilities to create a supported interchange format, such as XMI, when appropriate.
Export may not preserve Rational Software Architect-specific features, diagrams, or project information, so retain the original EMX file.
Software applications that can open emx files:
Multiplatform
Software applications that can edit emx files:
Multiplatform
Software capable of saving emx files:
Multiplatform
Software apps that create emx files:
Multiplatform
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