Compare Icon File and DirectDraw Surface formats — understand the key differences and when to use each
Icon File
ICO (Icon) is a file format used for icons in Microsoft Windows. ICO files can contain multiple sizes and color depths in a single file, typically including 16×16, 32×32, 48×48, and 256×256 pixel variants. The 256×256 size uses PNG compression. ICO is also used for website favicons (favicon.ico) displayed in browser tabs. Converting PNG to ICO is a common task for web developers and software creators.
DirectDraw Surface
DirectDraw Surface (.dds) is a image file format.
| Feature | ICO | DDS |
|---|---|---|
| Full Name | Icon File | DirectDraw Surface |
| File Extension | .ico | .dds |
| Category | image | image |
| Free to Convert | ✓ Yes | ✓ Yes |
| Browser Support | ✓ All Browsers | ✓ All Browsers |
| Convert to Each Other | ✓ Yes | ✓ Yes |
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