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.ICO File Extension

NEW: Open .ICO files for FREE with File Viewer

Icon File Icon
File TypeIcon File
DeveloperN/A
Popularity
4.0 (4 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySystem Files
File Format Description

Image format used for storing icons for Windows programs, files, and folders; contains two bitmaps: 1) the AND bitmap - the image mask (which determines what part of the icon is transparent) and 2) the XOR bitmap - contains the icon which is mapped onto the image mask; ICO files can be modified to create custom icons.

The "favicon.ico" file is used to store a small website logo that appears in the address bar of a Web browser. If a website has a favion.ico image, it will appear to the left of the Web address when any page of the website is loaded. The favicon.ico image file must be 16x16 pixels and stored in the root directory of the website in order for the Web browser to recognize it.

An ICO file is similar to a Windows cursor (.CUR) file, but has a different identification byte in the header.

Common ICO Filenames:

favicon.ico - A 16x16 pixel .PNG file located in the root directory of a website and containing a small icon graphic to be displayed in the Web browser's address bar.

Program(s) that open .ICO files
Linux Logo
Linux
Inkscape Icon Inkscape
GIMP Icon GIMP
Updated 7/5/2012