Convert PNG to ICO

Windows icons are their own format, and they cap out at 256x256. A larger PNG is scaled down to fit rather than refused. Transparency carries over, which is the whole point for an icon - square white corners give the trick away immediately.

Drop PNG file(s) to start

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What is PNG?

PNG is the web's lossless image format. It compresses without ever degrading the picture and has a real alpha channel, which is why screenshots, logos, line art and anything with sharp edges or text belong in it. The trade is size: on a photograph, PNG is enormous compared to JPG.

What is ICO?

Windows icons, and a container rather than an image - one file holds the same icon at several sizes, so Windows can pick the right one for a title bar or a desktop. It tops out at 256x256 and supports transparency, which is what stops an icon looking like a sticker.

Your files never leave your device · no magic required