>> ICO file

ICO file format description

Many people share .ico files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ico file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ico files.

1 filename extension(s) found in our database.

.ico - Windows Icon

The ICO file format is an image file format used for icons in Microsoft Windows.

Graphic files
- / -
Windows Icon related extensions:
HP Raster Transfer Language
IW44 Encoded DjVu Image
CALS Compressed Bitmap
Autodesk AutoShade Output
GD Library 2 Image
Better Portable Graphics Image

Naturally, other applications may also use the .ico file extension. Even harmful programs can create .ico files. Be especially cautious with .ico files coming from an unknown source!

Can't open a .ico file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .ico file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cio, co, ic, ic0, ici, ick, icl, icp, ido, ifo, io, ioc, iso, ixo, jco

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Infini-D 3D Object
DVD Information File
Arabian Nights Game Data
Bioware Information File
LightCycler v4 Experiment Data
ImageForge Pro Graphic Object Layer Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .ico file format, then write to us!