ICO is the icon format used for website favicons and Windows application and shortcut icons. Converting a PNG to ICO lets you turn a logo or graphic into the small, square icon that appears in browser tabs, on the desktop, and in the taskbar. It is an essential step when building a website or packaging a desktop app.
For best results, start with a square PNG that has a transparent background; the converter centers and scales your image into a clean icon up to 256×256 pixels, the maximum the ICO format supports. Because the icon is embedded as a PNG inside the ICO container, transparency is preserved and the result looks sharp at common favicon sizes.
FreeConvertImg generates the ICO file entirely in your browser, with nothing uploaded. Drop in your PNG, download the favicon, and place it at the root of your website or use it for your application.
Frequently Asked Questions
What size should my PNG be?
A square PNG works best. The converter outputs an icon up to 256×256 pixels, the maximum the ICO format supports.
Is transparency kept?
Yes. The icon preserves the transparent background of your PNG, which is ideal for favicons.
Can I use the result as a favicon?
Yes. Save the file as favicon.ico and place it in your website’s root directory, or reference it in your HTML.