Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .fi

2 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .fi file?
  • Which program can create the .fi file?
  • Where can you find a description of the .fi format?
  • What can convert .fi files to a different format?
  • Which MIME-type is associated with the .fi extension?
Fortran Interface File .fi file icon

Fortran Interface File

The FI file is a Fortran Interface File. 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.
Category: Development files
Application: Fortran Tools
Program name: -
Mime-type: text/x-fortran
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Fortran Source Code
Fortran Declaration File
Fortran IV Source Code
Fortran 1T Data
Gforth Image File .fi file icon

Gforth Image File

The FI file is a Gforth Image File. Gforth is the Forth implementation of the GNU project. An image file is a file containing an image of the Forth dictionary, i.e., compiled Forth code and data residing in the dictionary.
Category: Development files
Application: Gforth
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Gforth Blocks File
Forth Source Code
Gforth Forth Stream Source Code

Other types of files may also use the .fi file extension. If you have helpful information about .fi extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

OpenEdge ABL Before Image
Polyspace Preprocessed Code Data
D Language Source Code
Electric Image
Flick App

The .fi filename extension is often given incorrectly!

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

di (1), bi (1), ti (1), if (1), fu (1), fl (1), ei (1), ci (1), vi (1), ri (1), gi (1), fo (1), fk (1)

Can't open a .fi file?

If you want to open a .fi file on your computer, you just need to have the appropriate program installed. If the .fi association isn't set correctly, you may receive the following error message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android