VTFEdit is developed by Nem. Visit his website for more details. http://nemesis.thewavelength.net/index.php?p=41
Note that VTFEdit requires the .NET Framework 2.0 to run. Download it from Microsoft here (64-bit).
* Convert .bmp, .dds, .gif, .jpg, .png and .tga files to .vtf and .vmt files with easy access to all .vtf options.
* Convert .vtf files to .bmp, .jpg, .png and .tga files.
* Convert entire folders to and from .vtf and .vmt files.
* Convert .wad files to .vtf and .vmt files.
* Explore .bsp, .gcf, .pak, .wad and .xzp packages.
* Preview .vtf files.
* Recent file menu.
* 100% Free.