ICO converter

Upload an image to generate a multi‑size .ico file. All processing happens in your browser only.

Image file

PNG, JPEG, GIF (first frame), BMP. Square image recommended · under ~4 MB is best.

Choose file

No file selected

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Preview

Sizes

An ICO can contain multiple resolutions.

16 px 32 px 48 px 64 px 128 px 256 px (32‑bit only)

Bit depth

8 bits (256 colors, palette) 32 bits (16.7M colors & alpha)

Convert Download favicon.ico

Tip: For favicons, include 16/32/48 px. For app icons, add 64/128/256 px.