While it's harder to ask the Fontello folks to add support for Feather, it's probably better that Feather icons are made to be compatible with Fontello. At the moment, they are not.
Fontello has a Wiki page for making SVG image to work with it here: https://github.com/fontello/fontello/wiki/How-to-use-custom-images#importing-svg-images
All the icons in this set are stroke style. From my experience fontello and icomoon works perfect with filled icons. I have converted these icons into filled icons to be compatible with fontello and icomoon. You can download it here
Aren't you gonna keep the updated icons in the repo and keep them up-to-date with original ones?
Does anyone know a solution to this issue?
@yadavco Link is broken.
Found @rfbezerra in #560 who maintains a fork of feather with the icons and fonts compatible with Fontello.
https://github.com/okj579/feather-font worked for me (Fontello bundle)
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All the icons in this set are stroke style. From my experience fontello and icomoon works perfect with filled icons. I have converted these icons into filled icons to be compatible with fontello and icomoon. You can download it here