A tool to split/segment a TTF file into multiple WOFF2 files based on Unicode character ranges, and generate a CSS file that describes that font face as an aggregate of those WOFF2 files.

pip install ttf2web

ttf2web /path/to/font-file.ttf

This will split font-file.ttf based on a set of pre-defined Unicode ranges, and create (in the working directory) font-file.css and a directory named assets containing the WOFF2 files.

Here's a demo of a more complete example:

$ ls
Raleway-Regular.ttf  unicode-ranges

$ cat unicode-ranges
greek         U+0370-03FF
greek-ext     U+1F00-1FFF
latin         U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC
latin-ext     U+0100-024F,U+0259,U+1E00-1EFF,U+20A0-20CF,U+2C60-2C7F,U+A720-A7FF

$ ttf2web -v --unicode-ranges unicode-ranges Raleway-Regular.ttf
Processing greek
  Generated assets/Raleway-Regular.greek.woff2
  Found 1 glyphs for 1 out of 144 unicodes
Processing greek-ext
  Found no glyphs for any of 256 unicodes
Processing latin
  Generated assets/Raleway-Regular.latin.woff2
  Found 202 glyphs for 197 out of 264 unicodes
Processing latin-ext
  Generated assets/Raleway-Regular.latin-ext.woff2
  Found 157 glyphs for 157 out of 897 unicodes
Generated Raleway-Regular.css

$ ls
assets  Raleway-Regular.css  Raleway-Regular.ttf  unicode-ranges

$ head -n 12 Raleway-Regular.css
@font-face {
        font-family: "Raleway";
        font-style: normal;
        font-weight: 400;
        src: local("Raleway"), url(assets/Raleway-Regular.greek.woff2) format("woff2");
        unicode-range: U+0370-03FF;
}
@font-face {
        font-family: "Raleway";
        font-style: normal;
        font-weight: 400;
        src: local("Raleway"), url(assets/Raleway-Regular.latin.woff2) format("woff2");

MIT