About ICO Icon Converter
This tool converts ordinary images into ICO icon files with sizes ranging from 16px to 256px. It can create multi-size ICO files with multiple resolutions packed inside. All processing happens locally on your device to keep your files safe.
Features
- Supported Formats: Works with all common image formats including PNG, JPG/JPEG, WebP, GIF, BMP, SVG, ICO, etc. If the preview loads successfully, it can be converted.
- Icon Sizes: Available sizes: 16px, 32px, 48px, 64px, 128px, 256px. Single-size and multi-size modes are supported. Multi-size ICOs contain multiple resolutions within one file.
- File Name: Default output name is favicon.ico, widely used for website icons. You may also choose to use the original image filename as your ICO name.
How to Use
- Drag an image into the upload box or click to select a file; a preview will appear after upload.
- Adjust settings: icon size mode, pixel sizes and output filename.
- Click Generate & Download to save the ICO file directly to your device.
What Is an ICO File?
ICO is a dedicated icon format for browsers and operating systems. Regular images cannot be recognized as system icons, while ICO files work natively across platforms. Common use cases:
- Browser tab favicons (the small icon shown on website tabs)
- Custom desktop folder and shortcut icons on PC
- Window icons for desktop apps and client software
- Icons displayed in browser bookmarks and favorites