ICO Converter

What is ICO Converter?

An ICO file is the icon format used by Windows and by the classic favicon.ico on websites. A single ICO can hold several sizes of the same icon, and the system picks the best one for each place it is shown. This converter turns an image into one ICO file with the sizes you choose, from 16 to 256 pixels. You can keep transparency or add a solid background, and choose whether the image is fitted inside the square or fills it. If you need a full set of website icons, with PNG sizes, an Apple touch icon, a web manifest and the HTML code, use the Favicon Generator instead.

Why use this tool?

• Choose any combination of 16, 24, 32, 48, 64, 128 and 256 pixel sizes, all stored in one .ico file.
• Keep transparency or fill the icon with a solid color.
• Choose whether the image is fitted inside the square or fills it, and add padding.
• See the icon at real sizes before you download.

How to use ICO Converter

1. Step 1. Upload a PNG, JPG, WebP, GIF, BMP or SVG image.
2. Step 2. Tick the sizes to store in the ICO file. 16, 32 and 48 suit website favicons.
3. Step 3. Choose how the image fits the square and whether to add a background.
4. Step 4. Select Convert to ICO and download the file.

Common use cases

Important notes

• The images inside the ICO are stored as PNG, which every current browser and Windows Vista and later support.
• ICO sizes go up to 256 by 256 pixels. For larger icons, use the PNG files from the Favicon Generator.
• Include 256 pixels for Windows desktop icons. For a website, 16, 32 and 48 are enough.
• A source that is not square is fitted inside the square by default, so use a square image for the best result.
• Your image is processed in your browser and is not uploaded to our server.

More Image Tools