A daily updated filename extension database!

FD file extension

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

  • What is the .fd file?
  • What program do I need to open a .fd file?
  • How can the .fd file be opened, edited or printed?
  • How can I convert .fd 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 Declaration File

FD file is a Fortran Declaration 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: -
FD aliases:
FD related links:
FD related extensions:
Fortran Source Code

Fortran Interface File

Fortran IV Source Code

✅ STK Facility Database Main File

FD file is a STK Facility Database Main File. STK (Systems Tool Kit) is a physics-based software geometry engine that accurately displays and analyzes land, sea, air, and space assets in real or simulated time.
FD format description not yet available
Category: Data files
Application: Systems Tool Kit
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
FD aliases:
FD related links:
FD related extensions:
STK Planetary Ephemeris File

STK Aerodynamics File

STK Attitude

STK Azimuth-Elevation Mask

STK Body Mask File

STK Calculation Scalar File

STK Central Body Rotation File

STK City Database Main File

STK City Database Counties

STK Database Update Information

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

🚫 The .fd file extension is often given incorrectly!

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

bd, cd, dd, df, ed, fc, fe, ff, fr, fs, fv, fw, fx, gd, rd

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

OMA Download Descriptor
C64 Doodle Image
Edinburgh Instruments FLS1000 Data
FlexiSign Document
Forth Source Code
F# Implementation
General Firmware File
Ben Daglish Music
Finalburn Alpha Movie Capture
RMCProfile Sulphur and Fluorine Data

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

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