- Extension
- .ico
- .att
- Format
- Binary
- Binary
- Category
- Raster Image
- Raster Image
- Developer
- Microsoft
- AT&T Laboratories Cambridge
- Description
- An ICO file is an image format used to store icons for Windows programs, files, and folders. It 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.
- AT&T Group 4 is a file format used for compressing high-resolution data. It is most commonly used for storing images such as TIFFs, JPEGs, and GIFs. The format is lossless, meaning that no data is lost during compression.
- MIME Type
- image/x-icon
