.FSI File Overview

File Extension:	FSI
File Type Description:	Visual F# Signature File
File Type Developer:	Microsoft Corporation
Primary Associated Software:	Microsoft Visual Studio
Primary Software Developer:	Microsoft Corporation

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What is File Extension FSI?

Microsoft Corporation created the Visual F# Signature File (FSI) file for the Microsoft Visual Studio software series. Our internal web tracking data indicates that Windows 10 operating system users, and those living in China, are the most likely to use Visual F# Signature File files. A high percentage of these users browse the web using Google Chrome.

Associated Developers and Software

	FileSplit by Partridge Software
	FSI Viewer by NeptuneLabs
	Microsoft Visual Studio by Microsoft Corporation

Top FSI User Languages

Top FSI File User Browsers

Desktop Friendly?

Mobile Friendly?

Top User Operating Systems


Windows 10	Windows 11	Windows 6	Windows 8.1

Associated Operating Systems

	Windows
	Web

Other File Types Related to FSI Files

Extension	File Type Developer	File Category	File Type Description
.APPX	Microsoft Corporation	Developer Files	Windows 8 App Package
.SWM	Microsoft Corporation	Disk Image Files	Split Windows Imaging Format File
.HLP	Microsoft Corporation	System Files	Windows Help File
.NAL	Novell, Inc.	Data Files	Novell ZENworks Suite Network Delivered Application Shortcut File Format
.COVERAGE	Microsoft Corporation	Data Files	Visual Studio Code Coverage Report
._WDXSLN140	Microsoft Corporation	Data Files	Microsoft Visual Studio Data
.BML	Various Developers	Web Files	Bean Markup Language File
.WER	Microsoft Corporation	Uncommon Files	Windows Error Report File
.FS	Microsoft Corporation	Developer Files	Visual F# Source File
.JPG-LARGE	Zoner Software	Raster Image Files	Large JPEG Image