Convert Graphics Interchange Format (.gif) to Windows Icon (.ico) online for free. Fast, secure image conversion with no watermarks or registration.
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ICO is the Windows icon file format, capable of storing multiple image sizes (16x16, 32x32, 48x48, 256x256) within a single container. Converting a GIF to ICO transforms your graphic into a proper Windows icon that can be used for application executables, desktop shortcuts, website favicons, and Windows shell customization. The conversion resizes your GIF to standard icon dimensions and embeds multiple sizes for crisp display across different Windows UI contexts.
GIF's 256-color palette and simple graphics make it a surprisingly good source for icon creation. Many simple logos, pixel art sprites, and symbolic graphics originally created as GIFs translate well to the small icon canvas. The conversion handles the color palette mapping, transparency extraction (GIF's 1-bit transparency maps to ICO's transparency mask), and multi-size embedding automatically.
Windows requires ICO format for application icons, taskbar pins, and Start Menu entries. If you have a logo or graphic in GIF format and need to brand a Windows executable, create a desktop shortcut icon, or generate a favicon for a website, ICO is the required format. No amount of renaming or embedding a GIF will satisfy Windows' icon loading code — the file must be a genuine ICO with the proper header structure and embedded bitmap or PNG data.
Favicons for websites historically used ICO format because Internet Explorer exclusively supported it. While modern browsers accept PNG and SVG favicons, ICO remains the safest choice for maximum browser compatibility, including older IE versions still used in corporate environments. An ICO favicon with embedded 16x16 and 32x32 sizes covers both the browser tab icon and the bookmark/favorites icon.
The conversion decodes the GIF (first frame if animated), then generates ICO-standard sizes: 16x16, 32x32, and 48x48 pixels. Each size is embedded as a separate image entry within the ICO container. The resizing uses Lanczos resampling for sharp downscaling. GIF's 1-bit transparency is preserved as the ICO alpha channel — transparent pixels in the GIF become transparent in the icon. The ICO file uses PNG-compressed entries for 256x256 and uncompressed BMP data for smaller sizes, following the Windows Vista+ ICO specification.
Icon quality depends heavily on the source GIF's resolution and design. Simple graphics, logos, and pixel art convert well because they have clean edges and limited colors — properties that survive aggressive downscaling to 16x16 pixels. Photographic GIFs or complex illustrations will lose detail at icon sizes. GIF's 256-color limit is actually an advantage here since ICO icons at small sizes rarely need more than 256 colors anyway. Transparency is preserved but note that GIF only supports binary transparency (fully transparent or fully opaque), not partial alpha blending.
| Device | GIF | ICO |
|---|---|---|
| Windows PC | Native | Native |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Partial |
| Linux | Partial | Partial |
| Web Browser | Native |
GIF to ICO conversion enables you to turn simple graphics and logos into proper Windows icon files. The multi-size output ensures crisp display across all Windows UI contexts, from tiny taskbar pins to large desktop icons. For best results, start with a clean, simple GIF design that maintains recognizability at very small sizes.
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| Egenskap | GIF | ICO |
|---|---|---|
| Fullt navn | Graphics Interchange Format | Windows Icon |
| Filendelse | .gif | .ico |
| Best egnet for | Animation support | Windows icons |