ico
What is a .ico file?
image/x-icon
ICO is a Windows icon container that bundles multiple image sizes and bit depths in a single file so the system can pick the best resolution. Each entry is stored as a BMP-style bitmap or embedded PNG, commonly at sizes like 16, 32, and 48 pixels. It is the traditional format for application and website favicons.
How to use a .ico file
Use an example ICO to test favicon and icon extraction, multi-resolution selection, and converters that build ICO files from PNG sources.
Download example .ico files
- ICO — Multi-Resolution App IconA Windows ICO containing four square sizes (16/32/48/64 px) of a simple app glyph — the classic favicon/desktop-icon container. Handy for testing icon extraction and multi-size rendering.
- Favicon Pack — Multi-size ICOWindows ICO containing 16/32/48 favicon sizes of the synthetic mark — for ICO parsers and extractors.
- Favicon (multi-size ICO)A multi-resolution favicon.ico bundling 16, 32, 48, and 64 px images of the brand mark — for testing favicon parsers, ICO decoders, and multi-image icon handling.