LanguageFSI
Microsoft Visual F# signature data
File type: Source code and script file
An fsi file extension is related to the F# a functional programming language. An fsi file contains signature data.
Found 3 different file type records with the same fsi filename suffix.
What is fsi file?
File type category:
Source code and script file
Date updated: December 31, 2024
The fsi file extension is associated with Microsoft Visual F#.
F# is a functional programming language for the .NET Framework. It combines the succinct, expressive, and compositional style of functional programming with the runtime, libraries, interoperability, and object model of .NET.
The fsi files are used for signature files used by Visual F#, a component of Microsoft's Visual Studio software development kit. The .fsi signature files contain information about the F# program element's public signatures, including types, namespaces, and other components.
The .fsi files can be used to specify accessibility rules to program code within an .fs file. This technique is used to restrict access to other program code that executes outside of the controlled .fs file.
The .fsi files always have the same filename as their associated .fs file.
How to open fsi file?
Use any of the Microsoft Visual Studio suites to work with .fsi files.
How to convert fsi file?
Conversion to other formats is not possible.
Suggested software to open fsi file:
Associated software actions with the fsi file
Software applications that can open fsi files:
Microsoft Windows NotePad (Microsoft Windows)
NotePad++ text editor (Microsoft Windows)
Sublime Text (Microsoft Windows)
TextEdit (Apple macOS / Mac OS X)
Sublime Text for Mac (Apple macOS / Mac OS X)
gedit (Linux/Unix)
Sublime Text for Linux (Linux/Unix)
Microsoft Visual Studio (Multiplatform)
GNU Emacs (Multiplatform)
Software applications that can edit fsi files:
Microsoft Windows NotePad (Microsoft Windows)
NotePad++ text editor (Microsoft Windows)
Sublime Text (Microsoft Windows)
TextEdit (Apple macOS / Mac OS X)
Sublime Text for Mac (Apple macOS / Mac OS X)
gedit (Linux/Unix)
Sublime Text for Linux (Linux/Unix)
Microsoft Visual Studio (Multiplatform)
GNU Emacs (Multiplatform)
Software capable of saving fsi files:
Microsoft Windows NotePad (Microsoft Windows)
NotePad++ text editor (Microsoft Windows)
Sublime Text (Microsoft Windows)
TextEdit (Apple macOS / Mac OS X)
Sublime Text for Mac (Apple macOS / Mac OS X)
gedit (Linux/Unix)
Sublime Text for Linux (Linux/Unix)
Microsoft Visual Studio (Multiplatform)
GNU Emacs (Multiplatform)
Programs for viewing fsi files:
Microsoft Windows NotePad (Microsoft Windows)
NotePad++ text editor (Microsoft Windows)
TextEdit (Apple macOS / Mac OS X)
GNU Emacs (Multiplatform)
Software apps that create fsi files:
Microsoft Visual Studio (Multiplatform)
Software apps that print fsi files:
Microsoft Windows NotePad (Microsoft Windows)
NotePad++ text editor (Microsoft Windows)
TextEdit (Apple macOS / Mac OS X)
Microsoft Visual Studio (Multiplatform)
GNU Emacs (Multiplatform)
Software applications that handle other tasks involving fsi files:
Microsoft Visual Studio (Multiplatform)
FileSplit data
File type category:
Various data file
Date updated: November 8, 2018
The fsi file extension is also used by the FileSplit, a file splitting utility for its default split file.
Used to split large files to several smaller ones. Probably obsolete software.
How to open fsi file?
You should be able to work and merge these files using FileSplit utility.
Suggested software to open fsi file:
Associated software actions with the fsi file
Software applications that handle other tasks involving fsi files:
FileSplit (Microsoft Windows)
FSI Viewer configuration
File type category:
Configuration file
Date updated: April 5, 2017
The fsi file extension is associated with the FSI Viewer, a web based picture viewer aimed for high resolution images.
The fsi file stores some kind of configuration of FSI Viewer.
Associated software actions with the fsi file
Software applications that can open fsi files:
FSI Viewer (On-line services)
Software apps that manage settings for fsi files:
FSI Viewer (On-line services)