ConvertCove

ICO file format

Windows Icon. Icon container holding several sizes at once; still used for favicons and Windows apps.

or drop files here · processed on your device, never uploaded

    What is an ICO file?

    ICO is the Windows icon format. One .ico file holds several images of different sizes, typically 16, 32, 48 and 256 pixels, and Windows or the browser picks the best fit for each place an icon appears.

    Since Windows Vista, the images inside an ICO may be stored as PNG, which keeps file sizes small and transparency smooth. That is what ConvertCove writes. favicon.ico in the root of a website is still recognised by every browser.

    Extensions.ico
    MIME typeimage/x-icon, image/vnd.microsoft.icon
    ContainsMultiple sizes, BMP or PNG encoded
    TransparencyYes
    Typical sizes16, 32, 48, 256 px

    Convert ICO to…

    Every conversion listed works in the converter above: add a ICO file and pick the target format.

    Convert to ICO from…

    JPG, PNG, WEBP, GIF, BMP, SVG

    Detailed guides: PNG to ICO

    Part of the image converter · all formats.