Image to ICO — Windows Icon Converter
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Drop images here
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Supports: JPG, PNG, WebP (square recommended)
Create Windows ICO Files
The ICO format is the standard icon format for Windows. Unlike PNG favicons, an ICO file can contain multiple sizes in a single file — the OS picks the right size automatically.
ICO File Structure
Vizua builds the ICO binary directly in your browser: a header, directory entries for each size, and BMP/PNG image data. Sizes up to 48px use BMP format; 256px uses embedded PNG for better compression.
Frequently Asked Questions
What sizes should I include?
For a typical website favicon, include at least 16x16, 32x32, and 48x48. For Windows desktop icons, add 64x64, 128x128, and 256x256.
How is this different from the favicon generator?
The favicon generator creates separate PNG files for each size. This tool creates a single .ico file containing multiple sizes — the traditional format for Windows and older browsers.
What image format should I upload?
Start with a square PNG of at least 256x256px. The tool will scale it down to each selected size.