Free Online ICO Converter

An ICO file is an image format used for icons on Microsoft Windows. ICO files can contain multiple images at different sizes and color depths, making them perfect for favicons and Windows desktop icons.

To create a favicon: 1) Upload your logo or image, 2) Select 16x16 size (standard favicon size), 3) Convert and download the ICO file, 4) Upload the file to your website's root directory, 5) Add <link rel="icon" type="image/x-icon" href="/favicon.ico"> to your HTML head.

Our ICO converter supports PNG, JPG/JPEG, and GIF image formats. For best results, use PNG images with transparent backgrounds or high-contrast designs that will be clearly visible at small sizes.

Absolutely! All image processing happens directly in your browser using JavaScript and HTML5 Canvas. Your images are never uploaded to our servers or stored anywhere. The conversion is completely client-side and secure.

Choose based on your needs: 16x16 for website favicons, 32x32 for Windows desktop icons, 64x64 for high-DPI displays, and 128x128 for modern Windows applications. For maximum compatibility, 16x16 and 32x32 are most commonly used.