Online KTX Converter (KTX Encoder) - Convert Images to KTX Format Free
Fast and robust online KTX converter. Convert PNG and JPG images to Khronos Texture (.ktx) format effortlessly with selections from ETC, ASTC, BCN, to PVRTC encodings without uploads.
Related Resources
Step 1: Select Image
HDR input note
HDR, EXR, and UltraHDR JPEG files can be used as inputs. Most current output paths still tone map into the RGBA8 encode pipeline; use DDS BC6H, KTX2 RGBA16F, or KTX2 RGBA32F when you need to preserve HDR source data as much as possible.
Features
Multiple Compression Formats
Support for ETC, ASTC, BCN, and PVRTC compression algorithms
No Upload Required
All processing happens in your browser using WebAssembly
High Quality
Professional-grade compression with quality presets
Fast Processing
Optimized WebAssembly modules for quick encoding
Format Information
Detailed compression statistics and file information
OpenGL Compatible
Generate files ready for OpenGL and WebGL applications
How to Use
Upload Image
Drag and drop or browse to select an image file from your computer
Choose Format
Select the appropriate compression format for your target platform
Configure Settings
Adjust compression settings if needed for your specific requirements
Download KTX
Click download to save your compressed KTX texture file
Frequently Asked Questions
KTX supports ETC1/ETC2 for mobile, ASTC for modern platforms, BCN for desktop, and PVRTC for iOS devices.
No, all processing happens in your browser using WebAssembly. Your files never leave your computer.
You can upload PNG, JPEG, WebP, GIF, BMP, and other common image formats supported by your browser.
PVRTC compression requires power-of-2 square dimensions (64x64, 128x128, etc.) for optimal compression.
Currently, KTX files are generated with single mipmap level. Mipmap generation is planned for a future update.
KTX2 is the newer format with Basis Universal supercompression support. KTX is the legacy format optimized for OpenGL.