What is an ICO File? The Secret of Website Favicons
The website identity
An ICO file is a specialized image format used primarily as a website "favicon" (the little icon you see in your browser tab). What makes ICO unique is its ability to store multiple sizes (16x16, 32x32, 48x48) of the same icon within a single file.
Technical Facts
- Standard Size: 16x16 or 32x32 pixels for browsers.
- Transparency: Fully supported.
- Compatibility: Essential for all web browsers and Windows desktop icons.