azam/svg2ico.sh

Last active September 23, 2025 17:33

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Convert SVG to ICO using ImageMagick, with transparent background and multi-size icons

Raw

convert -density 256x256 -background transparent favicon.svg -define icon:auto-resize -colors 256 favicon.ico

char1es31 commented Jan 15, 2020

This can be done in magick directly:

magick -density 256x256 -background transparent favicon.svg -define icon:auto-resize -colors 256 favicon.ico

Author

azam commented Jan 16, 2020 •

edited

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Updated with latest working parameters. Thanks all !

jmgeffroy commented Mar 3, 2023

Hi there, I'm jumping into this thread long after the previous post... But this command gives me a multi-sized ICO as expected, but all dimensions are completely white (or any color I specify as the background parameter)... I don't find any clue about it for now...

gsilvan commented Nov 29, 2024

If you want your favicon contain only certain sizes, you can specify them by setting `icon:auto-resize=64,48,32,16". This will lead to a much smaller file.

Full command:

convert -density 256x256 -background transparent favicon.svg -define icon:auto-resize=64,48,32,16 -colors 256 favicon.ico

GarfieldDeepClone commented Jan 14, 2025 •

edited

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My .ico also has white background when using this command:
magick favicon.svg -density 256x256 -background transparent -colors 256 -define icon:auto-resize="128,64,48,32,16" favicon.ico

What I'm doing wrong?

23W commented Sep 22, 2025

@GarfieldDeepClone it could be that your source SVG has white background

pa-0 commented Sep 23, 2025

is anyone else noticing that the icon size is always ~300kb when using imagemagick? This seems a bit excessive.

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