MSHI file format description

Many people share .mshi files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .mshi file can be edited, converted or printed with. On this page, we try to provide assistance for handling .mshi files.

1 filename extension(s) found in our database.

.mshi - Microsoft Help Index File

The MSHI development files are related to Microsoft Visual Studio. The MSHI file is a Microsoft Help Index File. The Microsoft Help is a Microsoft proprietary help file format.

Microsoft Visual Studio
Development files
- / -
Microsoft Help Index File related extensions:
LiveCode RevServer Script
Xilize Configuration Data
RPM Package Specification
Prolog Module Source Code
Valve Source Particle System Data
C++ Definition File

Naturally, other applications may also use the .mshi file extension. Even harmful programs can create .mshi files. Be especially cautious with .mshi files coming from an unknown source!

Can't open a .mshi 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 can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .mshi file extension is often given incorrectly!

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

msh, msi, shi

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

DAT Mesh
Microsoft Shell Script
MaxL Shell Script
Star Wars Battlefront 3D Model
ANSYS Workbench Mesh Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

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If you have useful information about the .mshi file format, then write to us! >> MSHI file