fontkit
An advanced font engine for Node and the browser
subfont
Speeds up your pages initial paint by automatically subsetting local or Google fonts and loading them optimally
set.prototype.issubsetof
An ESnext spec-compliant `Set.prototype.isSubsetOf` shim/polyfill/replacement that works as far down as ES3
ast-compare
Compare anything: AST, objects, arrays, strings and nested thereof
subset-font
Create a subset of a TTF/WOFF/WOFF2 font using the wasm build of harfbuzz/hb-subset