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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
F90 - Extension Details
Date Added: January 01, 1970
File Extension:  .F90
Description 1: .F90 file extension is linked with Fortran 90 Source File these are source codes written using Fortran 90 programming language. These files require reprocessing via CPreProcessor, before being passed and compiled by the Fortran compiler. Prior to Fortran 90 [F90] was Fortran 77 programming language. .F90 file extension is a requisite of Fortran 90 free source codes.
File Type:   Source Code and Script File
Mode: ASCII
Program(s) to Open:  Windows: Absoft Pro Fortran, Intel Fortran; Mac: Absoft Pro Fortran, Intel Fortran Compiler for Mac OS
Common:
Extension: