Online KTX Converter & Compressor - Convert PNG to KTX Free
Convert PNG and JPG images to Khronos Texture (KTX 1.0) format online. Encode 2D textures for OpenGL and Vulkan with ETC, ASTC, BCN, or PVRTC compression directly in your browser without uploads.
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Step 1: Select Image
Drag and drop an image here
or
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 & Vulkan Pipeline Standard
Outputs standard KTX containers ready for OpenGL, OpenGL ES, and Vulkan desktop and mobile 3D pipelines.
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.
This tool encodes standard 2D KTX 1.0 container files with a single base mip level. Automatic mipmap pyramid generation is not performed during KTX 1.0 encoding; multi-level mip chains should be generated within your offline texture pipeline or game engine if required.
KTX 1.0 is the classic Khronos container designed for direct GPU binding in OpenGL/Vulkan, storing raw GPU blocks (such as ETC or BCn); KTX 2.0 adds Basis Universal supercompression for ultra-compact web distribution and runtime transcoding. For Web3D (Three.js/Babylon.js), choose KTX2; for traditional OpenGL game engines, KTX 1.0 remains the reliable baseline.