.FTN File

The ftn file extension is mainly related to one of the source code formats from Fortran programming language. Fixed form.

Fortran is a general-purpose, procedural, imperative programming language that is especially suited to numeric computation and scientific computing. Originally developed by IBM in the 1950s for scientific and engineering applications.

Files with ftn file extension might be found as Fortran source codes.

How to open:

You should be able to edit these files with any text editor.

How to convert:

Probably cannot be converted to other formats.