The vtfedit12520.exe file you have requested: Tools and Utilities / Miscellaneous / VTFEdit 1.25 Graphics Tool - 849.54kb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:
VTFEdit is developed by Nem. Visit his website for more details. Nemesis.thewavelength.net that VTFEdit requires the .NET Framework 2.0 to run. Download it from Microsoft here (64-bit).Features* Convert .bmp, .dds, VTFEdit is a VTF texture conversion utility with a graphical interface. It can convert to and from and view all versions of the Valve Texture Format, and change the files' settings without requiring them to be recompiled.