This article explains two file formats with the TEX file extension. It also explains how to open your file on your computer, and how to convert it to another file format.
HOW TO: Enable 'Pdf Viewer' in Texmaker?
A file with the TEX file extension is most likely a source document created with LaTeX and used to define the structure of a book or other document, for example whether it should be converted into an article format, letter format, etc. It is a plain text format that can contain not only text characters, but also symbols and mathematical expressions.
Other TEX files are most likely images used by some video games to store the texture of objects, so that they look different from other 2D or 3D objects. Dead Rising 2 and Serious Sam are two examples of video games that use these types of files.
LaTeX documents can be viewed and edited in any text editor, because they are simply plain text files. Notepad in Windows, Notepad++, and Vim are some examples of text editor programs.
