Sources & Credits

The Chopmark Lookup tool relies on character data, fonts, and software from a number of open projects. Thank you to everyone who has made their work freely available.

Character data

• Unihan Database (© Unicode, Inc.) — pinyin readings and English definitions

Modern Hanzi glyphs

• Noto Sans CJK (Google)
• Plangothic
• LXGW WenKai

All three modern-Hanzi fonts are distributed under the SIL Open Font License.

Seal, Bronze, Oracle, and Liushutong script forms

• hanziyuan.net — Richard Sears' "Uncle Hanzi" project, a remarkable freely-shared paleographic character database
• Academia Sinica's 小學堂 (xiaoxue) — Chongxi seal script glyphs
• Wikimedia Commons contributors — additional ancient-script SVGs

Build tools

• fontkit — glyph outline extraction
• @napi-rs/canvas — server-side image rasterization
• subset-font — webfont subsetting