BLN file format description

Many people often share .bln files without providing instructions on how to use them. This can make it difficult for users to determine which program is compatible for editing, converting, or printing .bln files. To address this issue, we have created this page to offer assistance and guidance on handling .bln files. We provide information on compatible software, editing instructions and conversion options to help users effectively interact with .bln files.

Our aim is to simplify the process and promote seamless use of the .bln file format.

2 filename extension(s) found in our database.

.bln - Golden Software Blanking

The BLN data files are related to MapViewer. The BLN file is a Golden Software Blanking. he Golden Software (GS) Blanking file is an ASCII format file used to store geographic information including areas (polygons), curves (polylines), and points. Even though the primary use of GS Blanking files is to indicate regions to be "blanked-out", they can also be used for simple boundaries and illustration purposes.

Category:Data files
Magic:- / -

Golden Software Blanking related extensions:

  • gsm MapViewer Project File

.mm - Rise of Nations Campaign Media Data

The MM game data files are related to Rise of Nations. The MM file is a Rise of Nations Campaign Media Data. Rise of Nations is a real-time strategy computer game, developed by Big Huge Games and published by Microsoft on May 20, 2003.

Application:Rise of Nations
Category:Game Data files
Magic:- / -

Rise of Nations Campaign Media Data related extensions:

  • cml Crazy Machines Lab Data
  • dn2 Duke Nukem II Game Data
  • con Train Simulator Model Identification
  • sqs Operation FlashPoint Script
  • chm Two Worlds 2 Animation Data
  • ddv Oddworld: Abes Oddysee Data

Be careful.

It is important to understand that the .bln file extension is not limited to a particular set of applications. Other programs besides the intended ones can also use the .bln extension to create files. This includes potentially harmful programs or malware that may generate .bln files for various purposes. Be especially cautious with .bln files coming from untrusted or unknown sources.

Can't open a .bln 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 an extension, you receive the following message:

Select an app to open this .bln file

To set the .bln file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. Under the Default apps section, you will find various categories such as Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate, such as Photos for image files or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the desired app is not listed, click on More apps to see additional options or click on Look for an app in the Microsoft Store to search for apps in the Store.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set .bln file association. Many applications can open .bln files without requiring any specific file association to be set.

The .bln file extension is often given incorrectly

Based on searches conducted on our site in the past year, we have compiled a list of the most common misspellings. These frequent misspellings can cause confusion and hinder search accuracy. Our goal in providing this list is to help users find the right information more easily and enhance their overall search experience on our website.

These misspellings were the most common in the past year:

bin, bkn, bl, blb, blg, blj, blm, bn, bnl, bon, bpn, fln, hln, ln, vln

Is it possible that the filename extension is misspelled?

There is a possibility that the .bln filename extension is misspelled. To assist users in identifying potential errors, we provide a list of similar file extensions in our database.

Filename extensions similar to .bln:

Operating systems

At, we strive to provide a seamless user experience by ensuring compatibility with a wide range of operating systems. The following is a comprehensive list of the operating systems currently supported by

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you find the information on this .bln page useful, please feel free to link to this page. >> BLN file