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# fonttools subset
> Generate subsets of fonts or optimize file sizes.
> More information: <https://fonttools.readthedocs.io/en/latest/subset/index.html>.
- Subset a TTF font file to the Basic Latin Unicode block:
`fonttools subset {{path/to/font.ttf}} --unicodes=U+0000-007F`
- Change the file type to WOFF2:
`fonttools subset {{path/to/font.ttf}} --unicodes=U+0000-007F --flavor=woff2`
- Keep only the onum (oldstyle figures) and kern (kerning) OpenType font features:
`fonttools subset {{path/to/font.ttf}} --unicodes=U+0000-007F --layout-features=onum,kern`
- Set the output file's name:
`fonttools subset {{path/to/font.ttf}} --unicodes=U+0000-007F --output-file={{path/to/subset.ttf}}`