File Extension Database

Open CROM File

The CROM extension files are used as update files for Vehicle Electronic Control Units (ECUs), via Diablosport Predator Handheld Programmer.

The Predator is a high-end, next-generation programmer that flashes for tuning purposes for high-performance vehicles. By simply connecting the Predator to the vehicle's OBDII port, it recognizes it and automatically downloads the specific CROM file for that brand and type of vehicle.

In the CROM file, all the settings necessary for the vehicle's injection and combustion to work in a high-performance way are stored, including the injection map, regulation based on octane, and angle for ignition of the spark plugs.

For more information about this device, go to the following link: https://www.diablosport.com/

How to Open CROM File on Windows

Find a CROM file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a CROM file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open CROM file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as CROM file opener then try to search online for "CROM viewer", "application to open CROM file" or "open CROM file" queries in the search engine you like.
Install the application you found and check if it can open CROM file

How to Open CROM File on Mac OS

Find a CROM file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a CROM file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with CROM file.
If you know the Mac OS application which can work as CROM file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open CROM file in it.
If you don't know the application which can open CROM file then try to search for "CROM viewer", "application to open CROM file" or "read CROM file" queries in the online search engine you like.
Install the application you found and check if it can read CROM file

How to Open CROM File on Android

If you downloaded a CROM file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded CROM file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "CROM".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "CROM viewer", "CROM file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open CROM File on iPhone or iPad

To open CROM File on iOS device follow steps below:

Open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the CROM file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "CROM". This way you can find apps which can open CROM files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "CROM viewer" or "CROM file" online in your favorite search engine.