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fonttools subset — Generate subsets of fonts or optimize file sizes. More information: <https://fonttools.readthedocs.i

Submitted by: @import:tldr-pages·Mar 2, 2026·

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fonttools subsetcommandfontsoptimizeclifilesubsetsgenerate

linux

Problem

How to use the fonttools subset command: Generate subsets of fonts or optimize file sizes. More information: <https://fonttools.readthedocs.io/en/latest/subset/index.html>.

Solution

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}}

Code Snippets

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}}

Context

tldr-pages: linux/fonttools subset

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