File Extension Library


.ONM File Extension

  • Developer by: Maptech, Inc.
  • Category: GIS, GPS navigation and map Files

What is an .ONM file?

.ONM file extension is created by Maptech, Inc.. .ONM has been classified as GIS, GPS navigation and map Files.

.ONM is Outdoor Navigator map

The onm file extension is associated with the Outdoor Navigator developed by Maptech.

The onm files contain map in Outdoor Navigator map map file format. Outdoor Navigator is discontinued product.


How to open:

Use Maptech Outdoor Navigator to open *.onm files.

How to convert:

Possibly can be converted to other map formats.

How to Open .ONM file on different platforms

Open .ONM File on Windows

  • Right-click a .ONM
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .ONM file and Select check box "Always use this app to open .ONM files" Press "Ok"

Open .ONM File on Mac

  • Right-click (or Ctrl + Left-click) the .ONM file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .ONM File on Linux

Right click on the .ONM file, choose "Open with" and select a program from the list above

Open .ONM File on iPhone

Select a file. If you don't see an application to open the .ONM file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .ONM File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .ONM files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .ONM files

  1. You need to update the application that you normally use to open .ONM files. Only the latest version of the software supports the current .ONM file format
  2. You need to check the .ONM file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)