File Extension Search

.vmt File Extension

Developer: Valve
File type: Valve Material File
You're here because you have a file that has a file extension ending in .vmt. Files with the file extension .vmt can only be launched by certain applications. It's possible that .vmt files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .vmt file?

The .vmt file extension is mainly associated with the Valve's Source engine and stands for Valve Material Type. It refers to Valve Material Files that contain important information needed for Source engine to simulate the surface of an object aurally, physically and visually. These files are used to apply a 2D surface of an object, in other words. The .vmt files contain data about the surface type, texture name, and shading parameters as well as other information. This file extension is used by the Half-Life 2 software, a computer game that uses the Source game engine. But aside from being a Valve Material File extension, it is also another extension associated with VMware. Unlike other file extensions used by this software, this .vmt file extension is used by VMware as a VMware virtual machine configuration file. In other words, it is used to configure the virtual machine created by VMware.

how to open a .vmt file?

Launch a .vmt file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .vmt file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .vmt files aren't yet associated with it. In this case, when you try to open a .vmt file, you can tell Windows which application is the correct one for that file. From then on, opening a  .vmt file will open the correct application. Click here to fix .vmt file association errors

applications that open a .vmt file

Valve Source SDK

Valve Source SDK

Valve Source SDK is a software development kit or SDK software, which is created by Valve Software, that is designed to create mods and maps for Source engine, except for some game applications like Portal 2, Left Dead, and Alien Swarm, as they have their own SDKs already. Source SDK has four main utilities and these are to create a mod, refresh SDK content, reset and edit game configurations. In creating a mod, it dumps the code of Source engine into a folder and a mod directory is created under the folder called SourceMods. SDK content is refreshed by checking new data updates as well as downloads. Game configurations can be reset and edited too. Basic games are the basis of how game configurations are recreated, while mods in configurations are removed except if they are edited manually. There are also applications integrated in this kit software, which are Face Poser, Valve Hammer Editor or Hammer and Model Viewer.


QuarkXpress is available in 36 languages improved by its developer Quark Inc. This application can run in windows operating system and Mac Os X. This can create and edit page layouts. Usually used in multi-media publishing and paper printed advertisers. QuarkXpress has a color adjust control that enables the program to use printing press pantone or hexachrome inks and more color space selections. It can import and output PDF files directly too. It has a multi-user functionality that enables many users to work on the same file simultaneously. Its print preview can automatically detect errors before printing the data. QuarkXpress version 7 supports more file format such as Unicode, JDF, Opentype and exporting PDF/X. Version 8 has the capability of understanding drop and drag functions, unlimited baseline grids and built in Adobe flash creator. QuarkXpress version 9 is the latest version but many users prefer version 8. The additional features of version 9 has reached cross-media publishing that can support eBooks.


VTFEdit is a VTF Texture utility with graphical interface that converts VTF and VMT files. It allows various file formats to be converted to and from and view all versions of the Valve Texture Format, and even change the settings of files without requiring them to be recompiled. It requires .NET Framework 1.1 based GUI tool to run. It features on normalizing grey scale images, accessing all VTF header flags, has VMT creation system with access to GCF, sharpening filters for MIP Map generation, has conversion tools for WAD and VMT creation wizard. VTFEdit converts .tga, .png., .jpg., .gif., .dds., and .bmp files to .vtf and .vmt and can be accessible in all .vtf options. This software is downloadble in the Internet for free. VTFEdit has also the following bugs: if you attempt to paste anything into the editor aside from text, the software will crash; and version 7.5 and does not support VTF files.

a word of warning

Be careful not to rename the extension on .vmt files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .vmt. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.

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