A daily updated filename extension database!

FTN file extension

The table below provides useful information about the .ftn file extension. It answers questions such as:

  • What is the .ftn file?
  • What program do I need to open a .ftn file?
  • How can the .ftn file be opened, edited or printed?
  • How can I convert .ftn files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

0 extension(s) and 1 alias(es) found in database

✅ Fortran Source Code

F file is a Fortran Source Code. Fortran is a computer programming language originally developed in the 1950s. It is still used for scientific computing and numerical computation half a century later. It is sometimes considered the earliest cross platform (standardized) programming language.
Application: Fortran Tools
Mime-type: text/x-fortran
Magic number: -
Magic string: -
Sample: -
F aliases:
f77, f90, for, ftn
F related links:
F related extensions:
C Source Code

C++ Source Code

Visual C++ Dialog

Microsoft Visual Studio Workspace Options

Visual C# .NET Class

Visual Studio Resource Script



Haskell Source With C Hooks

Haskell Source

Other types of files may also use the .ftn file extension.

🚫 The .ftn file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

btn, ttn, rtn, ftm, ftg, ft, fnt, ffn, ctn, vtn, tn, gtn, fth, ftb, frn

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

JustButtons Button Image
Tracor Northern Image
Windows Help Full Text Group File
Microsoft Windows Font
Bentley InRoads Topologically Triangulated Network Data
FileMaker Pro Theme
General CADD Font
TunnelCAD Input/Output File
VTWIN Network Project

🔴 Can't open a .ftn file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .ftn file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .ftn file extension, write to us!

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