.TEX File

The tex file extension is most notably associated and used for TeX/LaTeX text document files.

LaTeX is a document preparation system for high-quality typesetting. The tex file is a plain text that contains markup conventions, which define document structure.

It is most often used for medium-to-large technical or scientific documents but it can be used for almost any form of publishing (computer science, electrical engineering, economics, statistics, etc.)

MIME types used for tex files:
application/x-tex
application/x-texinfo

Files with tex file extension can be mainly found as special documents prepared using the TeX/LaTeX document preparation software.

How to open:

Use any LaTeX editor to open and work with *.tex documents.

How to convert:

TEX documents can be for example exported to PDF or PostScript. This can be usually done with some dedicated export function or via a virtual printer driver.