My posts are usually notes and reference materials for myself, which I publish here with the hope that others might find them useful.
Fonts obtain...
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In fact, Google does not use this tool for their website fonts.google.com, they use github.com/fonttools/fonttools (added in github.com/googlefonts/gftools) to convert the fonts to .woff and .woff2 formats.
Note that fonts are usually not licensed under the "public domain". Some font authors might not want you to freely convert their stuff.