KTX Texture Encoder/Decoder
Khronos Texture Container Format for OpenGL/OpenGL ES
Welcome to the ultimate free KTX format tools online. Discover the KTX converter (convert PNG/JPG to KTX) and KTX viewer with support for ETC, ASTC, BCN or PVRTC compressions optimized for OpenGL & WebGL.
About KTX Format
KTX (Khronos Texture) is a lightweight, flexible container format for compressed texture data. Designed by the Khronos Group, it provides a standardized way to store GPU-compressed textures for OpenGL, OpenGL ES, and WebGL applications.
Multi-Format Support
Supports various compression formats including ETC, ETC2, BCN, PVRTC, and ASTC
OpenGL Optimized
Designed specifically for OpenGL and OpenGL ES with direct GPU compatibility
Khronos Standard
Official standard from Khronos Group ensuring cross-platform compatibility
Technical Specifications
File Structure
KTX uses a simple structure with header, optional metadata, and texture data
- 64-byte header with format information and dimensions
- Optional key-value metadata for custom properties
- Texture data for all mipmap levels stored sequentially
Supported Formats
KTX supports multiple compression formats for different use cases:
- ETC1/ETC2 - Mobile platforms (Android, OpenGL ES)
- DXT/BCN - Desktop platforms (DirectX, OpenGL)
- PVRTC - iOS and PowerVR platforms
- ASTC - Modern mobile and desktop platforms
Limitations
- KTX 1.0 is considered legacy compared to KTX 2.0
- No supercompression support leads to larger file sizes
- Limited native browser support compared to newer formats
Use Cases
OpenGL Applications
Standard format for OpenGL and OpenGL ES texture loading
WebGL Development
Web-based 3D applications using compressed textures
Texture Testing
Testing different compression formats for quality comparison
Texture Archiving
Long-term storage of compressed texture assets
Format Comparison
| Feature | KTX | KTX2 | PVR |
|---|---|---|---|
| Format Support | ✓ Good | ✓ Excellent | ✓ Excellent |
| OpenGL Optimized | ✓ Yes | ✗ No | ✗ No |
| Mipmap Support | Yes | Yes | Yes |
| Supercompression | No | Yes | No |