ICO is a file format used for website favicons. It stores multiple image sizes in one file so browsers can pick the right size for each context.

What size should my favicon be?

The standard favicon size is 32x32 pixels, but we generate multiple sizes (16x16, 32x32, 48x48) for compatibility across browsers and devices.

Can I use any image format as input?

Yes, you can upload PNG or JPG images. For best results, use a square image with a simple design that remains recognizable at small sizes.

Is this tool free and private?

Yes, 100% free. All processing happens in your browser — your files never leave your device.

ICO Generator - Create Favicon ICO Files Free

What is an ICO File?

ICO is a file format used for icons in Windows and as favicons for websites. Unlike other image formats, ICO files can contain multiple sizes in a single file, allowing browsers and operating systems to choose the most appropriate size.

Recommended Sizes

16x16: Browser tab icon
32x32: Windows taskbar, browser tab (high DPI)
48x48: Windows desktop icon
64x64: High DPI displays
128x128: Windows 10/11 large icons
256x256: Very high DPI, Windows 10/11

How to Use Your Favicon

Add this line to your HTML <head> section:

<link rel="icon" href="/favicon.ico" type="image/x-icon">