How to open a file with .MUL extension?

File Type : SeeYou Flight Data (Naviter)
Compatible with (Win10, Win8, Win7, Vista and WinXP)

You'll need a new app to open this .MUL file

Searching for the right program to open .MUL files?

"You'll need a new app to open this file" is probably the most common error faced by millions of Windows users every day. This is either because the program required to open a file is not available on your system or there may be other issues.

We recommend that you run a free scan to check for missing drivers.


What is .MUL file extension?

Game file used by Ultima Online, one of the earlier massively multiplayer online (MMO) games; may save various kinds of data, including graphics, animation data, maps, and game items; also used for applying game patch updates. Sometimes Ultima Online users modify the contents of MUL files to alter gameplay. Tools such as MULTtool, Multibuilder, and MulPatcher can be used. However, since Ultima Online is an older game, some of these programs may be difficult to run on recent operating systems.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.

Software that can be used to open MULfiles:

  • MULTool
  • Multi Operations Utility
  • MulPatcher
  • UOSir