What is an ICO file?

ICO is a Windows icon file and, to a certain extent, a complete package: the file consists of several layers and contains PNG image files in different sizes on these layers. Depending on where the favicon is displayed, the browser uses a different image file from the ICO file. Common ICO sizes are 16 x 16 pixels, 32 x 32 pixels and 48 x 48 pixels. Theoretically, other file formats (PNG, GIF) can also be used as favicons – but only in more recent browser versions.

The perfect favicon

What should a favicon actually look like? First and foremost, don't overload it! Depending on the device and browser on which the favicon appears, a very detailed icon may not display correctly. Google, for example, uses a simple G in the characteristic Google colours. You are on the safe side with letters, a logo or an emoji!

Can I use favicons for apps too?

Yes, you can. App icons are the small icons you tap on your smartphone to open an app (so-called touch icons). You can also create these using our generator. The ZIP file contains all the icon formats needed for correct display on mobile devices. These include sizes such as 57 x 57px, 72 x 72px or 144 x 144px or larger.