A daily updated filename extension database!

FI file extension

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

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

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

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

✅ Fortran Interface File

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.
Application: Fortran Tools
Mime-type: text/x-fortran
Magic number: -
Magic string: -
Sample: -
FI aliases:
FI related links:
FI related extensions:
Fortran Source Code

Fortran Declaration File

Fortran IV Source Code

Fortran 1T Data

✅ Gforth Image File

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.
Application: Gforth
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
FI aliases:
FI related links:
FI related extensions:
Gforth Blocks File

Forth Source Code

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

🔄 .fi converters

The following softwares are capable of converting .fi files to other formats:


For example, using the softwares above, a .fi file can be converted into one of the following formats:

flp, pan, bmf, g4, 92i, mrc, emf, blk, ptg, exr, big, pat, dta, bmx, max

🚫 The .fi file extension is often given incorrectly!

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

bi, ci, di, ei, fl, fo, gi, if, ri, ti, vi

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Turing Include File
D Language Source Code
OpenEdge ABL Before Image
LabVIEW Virtual Instrument
602XML Form Filler Data
iBlaze Case Information File
Jovian Logic VIA Image
Roxio Recordnow! CD Image
CitectSCADA Data
BSC Intermediate Object

🔴 Can't open a .fi 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 .fi 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 .fi file extension, write to us!

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