.SMX File Extension

2 file types use the .smx file extension.

SmartMusic XML File

Developer MakeMusic
3.1  |  8 Votes

What is an SMX file?

Music file used by SmartMusic, a music practice application for band, orchestra, and voice; similar to a .XML file; contains XML formatted music notation data referenced by SmartMusic when users practice vocal or instrumental takes.

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Programs that open or reference SMX files


SourceMod Plug-in

Developer SourceMod Dev Team
2.0  |  1 Vote

An SMX file may also be a plug-in used by SourceMod, an add-on for Valve Counter-Strike: Global Offensive, Team Fortress 2, and other multiplayer Source Engine games. Modders use SMX files to add features to a game. Modders can create their own SMX files by writing SourcePawn scripts (.SP files) and compiling then, or they can download pre-existing SMX files from the internet.

More Information

The Source Engine is a 3D game engine that Valve used to develop Half-Life 2, Counter-Strike: Global Offensive, Team Fortress 2, Garry's Mod, and many other popular games. SourceMod is an add-on for Source Engine games, which allows players to customize their multiplayer game servers using various plug-ins, saved as SMX files.

Each SMX file contains scripts written in the SourcePawn scripting language, which modders developed specifically for use with SourceMod and Source Engine games. However, these scripts are compiled, so you cannot just open the SMX file to view them. Instead, you must decompile the SMX file, using one of many available SMX decompilers.

NOTE: Typically, modders compile SourcePawn scripts into SMX files with the online SourceMod Plug-in Compiler.

How to open an SMX file

To use an SMX file with SourceMod, you must install SourceMod on your local machine or remote server and then place the SMX file in the following directory:


For instructions on how to install SourceMod, click here.

If you want to decompile an SMX file, so you can view the SourcePawn script it contains, you can do so using Lysis Decompiler. Note, however, that Lysis Decompiler often cannot completely decompile SMX files, so some of the decompiled file's contents may not be human-readable. Despite this, Lysis Decompiler is still the best tool for decompiling an SMX file.

Programs that open or reference SMX files

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