image Format
ICO File Format
ICO is the icon container format used in Microsoft Windows and web browser favicons. A single ICO file can package multiple embedded icon resolutions ranging from 16x16 to 256x256.
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Technical Specifications
| Extensions | .ico |
| MIME Types | image/x-icon, image/vnd.microsoft.icon |
| Category | Image |
| Engine Tier | tier1-native |
| Magic Bytes / Sniffing | 0x00 0x00 0x01 0x00 |
| Opens With | Web browsers (as favicon), Windows shell |
| Good For | Website favicons and Windows application desktop icons. |
| Not Recommended For | General photographic storage and full-page illustrations. |