Some references and links used for this talk:

• A google fonts talk introducing Korean and Japanese fonts – this was the source for how their subsetting works.
• Web Almanac’s 2025 Font Usage stats
• The Unicode Consortium – can get technical pretty quickly, but also a few good explainers and some videos.
• UnicodeDecode.com – handy site to get the unicode codepoint from text, useful to help debug sometimes.

Subsetting tools mentioned:

• Glypht’s website (also available as a CLI tool)
• Glyphhanger CLI tool
• cn-font-split
• My experimental webpack plugin (do not recommend using in production… yet?)