ICO Converter

The ICO Converter turns images such as PNG or JPG files into the ICO format used for website favicons and Windows application icons. It is free to use and does not require any sign-up. Web developers building a favicon, software developers packaging a desktop app icon, and hobbyists creating custom icons all rely on tools like this.

What is an ICO file?

ICO is an icon container format originally built for Windows that can hold multiple image sizes and color depths inside a single file. Browsers and operating systems use it to display favicons and taskbar icons at whatever resolution the context calls for, commonly 16x16, 32x32, or 48x48 pixels. Because ICO files can bundle several sizes together, converting to this format is different from a simple one-to-one image conversion.

How to use the ICO Converter

1. Upload the PNG, JPG, or other image you want to convert.
2. Select the icon size or sizes you need.
3. Download the resulting .ico file.

Key features

• Converts PNG, JPG, and other common formats to ICO
• Supports standard favicon and app icon sizes
• Fast browser-based conversion with no installs
• Completely free with no sign-up required

Related tools

If you already have an ICO file and need the reverse, try ICO to PNG. You can also convert directly from a specific format with PNG to ICO or JPG to ICO.

Frequently asked questions

Is the ICO Converter free?

Yes, converting images to ICO format is free with no sign-up needed. You can convert multiple files without any cost.

What image formats can I upload?

You can upload common formats including PNG, JPG, BMP, and GIF. The tool reads the source image and rebuilds it as a proper ICO icon container.

What size should my favicon be?

Most browsers use a 32x32 or 16x16 pixel favicon, though many sites include multiple sizes in one ICO file for sharper display. Starting with a square source image gives the cleanest result.

Can I use the ICO file for a website favicon?

Yes, the ICO files produced by this tool work as standard website favicons when linked in your site's HTML head. They also work as Windows desktop and application icons.