How to Create Windows App Icons

Windows asks for 7 different icon sizes. A single .ico can hold all of them.

4 min read

The Windows icon size matrix

Microsoft recommends bundling 16, 24, 32, 48, 64, 128, and 256 in one .ico. The OS picks the right one per surface.

Compression matters at 256×256

Use PNG compression for the 128 and 256 entries — uncompressed BMP at that size produces a 256KB+ file.

Tools that do this right

Our generator bundles every size with optimal compression. Drop a 512×512 source and you're done.

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