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MUL File Extension

The MUL file extension was created by Origin Systems and is also known as the Ultima Online Multi File. MUL is classified as a Game Files and This file is saved in a binary format, which requires a specific program to read its contents. You can open MUL files in Gibbed's Deus Ex HR tools program.

Ultima Online Multi File Type

Ultima Online Multi File Type
Extension .mul
Developer Origin Systems
Popularity 5.0 (14 Votes)
Mime Type mime-type/not.available
Default Program Gibbed's Deus Ex HR tools
Category Game Files
Format Binary
Updated 7/1/2025

What is a MUL File Type?

Users of Ultima Online sometimes modify the contents of the MUL files to modify the gameplay. You can use tools such as MULTtool, Multibuilder and MulPatcher. Since Ultima Online is an older game, however, some of these programs may be difficult to run on recent d'systems.

Free Online MUL Tools & Apps

Access powerful and secure free online MUL tools to convert, view, edit, merge, split, and compare MUL files — all without installing any software. Our tools support the .MUL (Ultima Online Multi File) file extension and run smoothly in any modern browser.

Select a tool below to explore features and manage your MUL files directly from your device with ease.

MUL Files Common Issues

There are few common issues with the Ultima Online Multi File .MUL=10532 File Extensions while opening the .MUL=10532 files on Windows and MacOs, we have solution to those issues such as:

Can't Open MUL Files?

  1. You must have supported software programs installed for Ultima Online Multi File on your system such as Gibbed's Deus Ex HR tools.
  2. Associate default Gibbed's Deus Ex Hr Tools Gibbed's Deus Ex HR tools program for *.mul (Ultima Online Multi File) files.

    Associate MUL Default Program on Windows
    1. Right-click a *.MUL (e.g example.mul) file and click Open With.
    2. In the Open with dialog box, click Gibbed's Deus Ex Hr Tools Gibbed's Deus Ex HR tools program Or click Browse to locate the program (*.exe) that you want.
    3. Select check box for Always use this app to open .mul files.

    Associate MUL Default Program on MacOs
    1. Click *.MUL (e.g example.mul) file and click information -> Open With.
    2. In the programs list, click Gibbed's Deus Ex Hr Tools Gibbed's Deus Ex HR tools program Or other appropriate program that you want.
    3. Confirm Change for all... and Contine.
    4. A message will appear "This change will be applied to all files with .Gibbed's Deus Ex HR tools extension. By clicking Continue you confirm your selection", click Contine to apply changes.

Related MUL File Extensions

MUL default file extension is .MUL and other similer related extensions are:

All Platform Software Programs for MUL File Extension

List of all softwares that can open the MUL files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Microsoft Windows logo image Open MUL File on Windows

Software License Developer
Gibbed's Deus Ex HR tools image. Gibbed's Deus Ex HR tools 000 for Windows Free Gibbed's Deus Ex HR tools
Adobe Muse CC image. Adobe Muse CC 000 for Windows Paid Adobe
Opera image. Opera 20 for Windows Freeware Opera

MacOs logo image - FileProInfo.comOpen MUL File on Mac OS

Software License Developer
Adobe Muse CC image. Adobe Muse CC 000 for MacOs Paid Adobe
Opera image. Opera 20 for MacOs Freeware Opera

Linux logo image - FileProInfo.comOpen MUL file on Linux

Software License Developer
Opera image. Opera 20 for Linux Freeware Opera

Website logo image - FileProInfo.comOpen MUL file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen MUL file on iOS

Software License Developer

Android logo image - FileProInfo.comOpen MUL file on Android

Software License Developer

About Licensing

  1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
  2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
  3. Free+ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
  4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
  5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

MUL file extension icon image.About MUL - Ultima Online Multi File

FileProInfo is to help you understand about the Ultima Online Multi File with *.MUL suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for MUL. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

If you would like to suggest any additions or updates to this page for MUL, please let us know.

Updated 7/1/2025