BellCube Dev
Tools - FOMOD Builder

Support Notice

The FOMOD Builder is currently only supported on desktop systems running Chromium-based browsers. While I do eventually plan to provide support for Firefox, Safari, and the like, Chromium-based browsers include powerful web APIs for things like manipulation of files and directories that the FOMOD Builder relies on at the moment. In the future, support for other browsers maybe added.



Your browser does not support at least one of the APIs tested. Please use a different browser. You may still exit this dialog and attempt to use the FOMOD Builder, however BellCube makes no guarantees as to whether or not it will work.


Missing APIs:

Opening Another Project

Are you sure you want to open another project? There is already one open!

This is the folder that you will put into an archive to be installed by users. If it is not set up for a FOMOD just yet, no worries!

Will nuke your current file and reconstruct it from the ground up. This can be dangerous if you've manually commented on the file, however it also ensures that the FOMOD is schema-compliant—which can fix most instances of Vortex rejecting the installer due to non-compliance.

Will attempt to repair a FOMOD that is not schema-compliant. Will try to fix typos in the XML and remove elements that do not appear to be typos. THIS IS DANGEROUS! MAKE A BACKUP AND USE AT YOUR OWN RISK!


Explore the FOMOD Builder in all its glory, no folder required! This will load a test FOMOD that is included with the program. It may well be possible to use this on an unsupported browser; however, it is not recommended.

Tab: Metadata

This field is not technically used by Mod Organizer 2 or Vortex. That said, MO2's parser does assign the value to an unused variable that shares a name with the Nexus Mods Page ID elsewhere in its code.




This value must be a whole number. It is recommended that you create a mod page and use the page's Nexus Mods ID for this field.

The author of the mod.




This value is only read and displayed during FOMOD installation by Mod Organizer 2. It is not used by Vortex.

The version of the mod. I suggest using Semantic Versioning (aka SemVer) for this field.




This value is only read and displayed during FOMOD installation by Mod Organizer 2. It is not used by Vortex.

If specified, this should be a valid URI

A link to the mod's website.



This value is only read and accessible as a hyperlink during FOMOD installation by Mod Organizer 2. It is not used by Vortex.

Mod Name

Step Sorting Order


Tab: Installations