KTX (Khronos Texture) is a lightweight file format for OpenGL and Vulkan textures developed by the Khronos Group. It's designed to store textures in their GPU-ready format, eliminating the need for runtime conversion and providing optimal loading performance.
KTX files can contain 2D textures, cubemaps, texture arrays, and mipmaps. They support various compression formats including ETC, ASTC, S3TC, and PVRTC, making them ideal for cross-platform applications and games where texture loading speed and memory efficiency are crucial.