Fontknife
TL;DR: Rasterize & export only the glyphs you need
You can make sprite sheets of entire fonts:
fontknife convert tom-thumb.bdf sheet.pngUse the resulting image file:
(Shown at 200% size)
Only need some of the glyphs? Sure:
fontknife convert -P 48 -G "💪😎" NotoEmoji-Regular.ttf sheet.pngUse the sheet in your project:
Getting Started
Usage Guide