.FS File

File extension fs is associated with Microsoft Visual F# (F Sharp) development software. The .fs files are source code files created in this language.

F# (pronounced "F Sharp") 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. F# is a variant of the ML language. F# is designed for use with Microsoft's .NET library and tools.

Microsoft Visual Studio can compile the F# source code into dll or exe program executables.

Files with fs extension can be found as source codes written in the Microsoft Visual F# programming language.

How to open:

Use any suitable text editor or any specialised source code editor to open and work with the .fs files.

How to convert:

There is no way how to convert .fs source code files to other formats, but they can be compiled to exe or dll files.