Having problems opening a XUL file?

We have programs that can open or convert your XUL files.

Opening XUL files

Did your computer fail to open a XUL file? We explain what XUL files are and recommend software that we know can open or convert your XUL files.

What is a XUL file?

Files with the .xul extension are most commonly associated with the Mozilla Firefox Internet browser. The XUL files are XML user interface files. The XUL file format was created to make it easier to develop the Mozilla Firefox browser. Other Web browser that are based on the Gecko engine also use the XUL file format.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension XUL

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the XUL file format or software that uses files with the XUL suffix, please do get in touch - we would love hearing from you.