A daily updated filename extension database!

MMJ file extension

The table below provides useful information about the .mmj file extension. It answers questions such as:

  • What is the .mmj file?
  • What program do I need to open a .mmj file?
  • How can the .mmj file be opened, edited or printed?
  • How can I convert .mmj files to another format?

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ ProMark3 GPS MobileMapper Job File

MMJ file is a ProMark3 GPS MobileMapper Job File. ProMark3 is a professional GPS receiver and data collector device. ProMark3 is a dedicated tool designed for the high accuracy measurement survey work demands.
MMJ format description not yet available
Category: GIS files
Application: MobileMapper Office
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
MMJ aliases:
MMJ related links:
MMJ related extensions:
ProMark3 GPS MobileMapper Waypoint File

Other types of files may also use the .mmj file extension.

🚫 The .mmj file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

mj, mjm, mkj, mlj, mm, mmh, mmi, mmk, mmm, mmn, mmu

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

FreeMind MindMap
Matrix Market File
MovieJack DVD Ripper File
MiraMon Map File
Palladio ModelJoin Query File
Memory-Map Navigator Data
Dragon Age Model Mesh Heirarchy Data
JMF Mime Package
myPM Merge Data
Media Processing Server Index File

🔴 Can't open a .mmj file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .mmj file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .mmj file extension, write to us!

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Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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