Online DDS Converter & Compressor - PNG/JPG to DDS (BC1-BC7)
Free online DDS converter and encoder. Easily convert PNG, JPG, and other images to DirectDraw Surface (.dds) format with full BCn (BC1/BC3/BC7) compression support for DirectX and game engines.
Related Searches
Step 1: Select Image
Drag and drop an image here
or
- Supported formats: PNG, JPG, WebP, BMP
- Image dimensions must be multiples of 4 (e.g., 512×512, 1024×1024)
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
Browser-based
No server upload required, all processing happens in your browser
Full BCn Block Compression (BC1-BC7)
Comprehensive support for BC1-BC7 codecs (DXT1/DXT5, BC5 normal maps, BC7 high-quality PBR textures, and BC6H HDR), optimized for Unreal Engine, Unity, and DirectX 11/12.
Fast Encoding
WebAssembly-accelerated encoding for quick results
Multiple Formats
Support for PNG, JPG, WebP, and BMP input formats
Engine & Game Modding Quality Control
Fine-tune compression levels and mipmap generation tailored for Unreal Engine, Unity game assets, and PC game modding.
Free to Use
No registration or payment required
How to Use
Upload Image
Drag and drop an image file or click to browse. Ensure dimensions are multiples of 4.
Choose Format
Select the BCn compression format based on your texture type and alpha requirements.
Encode
The image will be compressed to DDS format using WebAssembly for fast processing.
Download
Download the encoded DDS file for use in your DirectX applications.
Frequently Asked Questions
DDS (DirectDraw Surface) is Microsoft's texture format for DirectX 3D graphics and game development. This tool converts standard images (PNG, JPG, WebP) into compressed DDS files using BCn formats (BC1-BC7). If you already have an existing .dds file and want to view it, inspect channels, or convert DDS to PNG, use our dedicated online DDS decoder at /dds/decode or /dds-viewer-online.
Select the format based on your texture type: BC1 (DXT1) for opaque diffuse textures; BC3 (DXT5) for textures with alpha transparency; BC5 for dual-channel tangent-space normal maps; BC7 for modern AAA game textures requiring high-fidelity RGBA detail with minimal compression artifacts; and BC6H for floating-point HDR environment maps.
BCn formats compress textures in 4x4 pixel blocks, but images do not have to be multiples of 4. For non-multiple dimensions, the encoder pads block edges during compression to support arbitrary dimensions, without cropping or altering the final image size.
DDS is primarily engineered for Windows desktop, DirectX, and console game pipelines. For cross-platform mobile (Android/iOS) or Web3D (Three.js/Babylon.js), we recommend transcode-ready formats like KTX2 or ASTC.
We support PNG, JPG, WebP, and BMP image formats as input for DDS encoding.
No, all processing happens locally in your browser using WebAssembly. Your images never leave your device.