Opening THMX files
Did your computer fail to open a THMX file? We explain what THMX files are and recommend software that we know can open or convert your THMX files.
What is a THMX file?
Files that contain the .thmx file extension are most commonly associated with theme files that have been created for 2007 and later versions of a variety of Microsoft Office applications. The THMX files that are used by these programs contain themes that a user can apply to a document or to a presentation that has been created by the associated software.
THMX files often contain pre-defined colors, formatting and fonts and can be used as a template that lets a user create multiple files with a similar look, but without recreating the settings for each file. THMX files are similar to application template files, but unlike application template files they can be shared across multiple Microsoft Office applications.
For example, a THMX file can be used in both PowerPoint and Word instead of having to create a template for both applications.
Software that will open, convert or fix THMX files
Try a universal file viewer
In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.