Why Convert Images to ICO?
ICO (Icon) is the standard format for favicons—the small icons that appear in browser tabs, bookmarks, and shortcuts. Windows also uses ICO for application and folder icons. Converting PNG, JPG, or SVG to ICO lets you create professional favicons for websites and apps. Our tool supports multiple sizes in a single ICO file (16×16, 32×32, 48×48, 256×256) for compatibility across devices.
Favicon Requirements
Websites need favicons in ICO or PNG format. ICO can contain multiple resolutions, so one file works everywhere. Browsers and operating systems pick the right size automatically. Our converter creates ICO files that work with all major platforms.
How to Convert Images to ICO Online
Upload your image (PNG, JPG, or SVG). Choose output sizes (we include 16, 32, 48, and 256px by default). Click convert. Download your ICO file. All processing is client-side—no uploads. For best results, use a square image or one with transparency (PNG or SVG).
Step-by-Step
Start with a high-quality square image. PNG with transparency works best for favicons. SVG can be converted first with our SVG to PNG tool if needed. Then convert to ICO. Place the ICO in your site's root or use a link tag in HTML.
ICO vs PNG Favicons
ICO supports multiple sizes in one file—ideal for legacy compatibility. PNG favicons are supported by modern browsers and are simpler. Many sites offer both. Our ICO converter creates standard ICO files that work with Internet Explorer, older browsers, and Windows. For modern sites, PNG favicons are often enough, but ICO remains the most compatible choice.
Best Practices
Use a simple, recognizable design. Favicons are small—16×16 or 32×32. Avoid fine detail. Test your favicon in multiple browsers. Our tool outputs multiple sizes so it looks good everywhere.
Creating Favicons from Logos
Start with your logo in PNG or SVG. Ensure it's square or crop to square. Convert to ICO with our tool. For SVG logos, use our SVG to PNG converter first to get a raster image at the right size, then convert to ICO. The result works as a favicon, app icon, or Windows shortcut icon.
Multi-Resolution ICO
Our ICO files include 16×16, 32×32, 48×48, and 256×256. Browsers and OSes select the appropriate size. One file, full compatibility.
Frequently Asked Questions
- Is the ICO converter free?
- Yes. Free, unlimited. Client-side processing.
- What image formats can I use?
- PNG, JPG, and SVG. PNG with transparency works best for favicons.
- Are my images uploaded?
- No. Conversion happens in your browser. Your files never leave your device.
- What sizes are included?
- 16×16, 32×32, 48×48, and 256×256 in a single ICO file.
- Why use ICO for favicons?
- ICO is the traditional favicon format with multi-resolution support. Works everywhere, including older browsers.