Minecraft wiki entry for Resource_Pack, associated text: As a fallback for untextured characters, Minecraft uses GNU Unifont. Each sheet of characters is stored following the format of unicode_page_##, where ## are the hexadecimal numbers 00 through FF. These pages are 16×16 pixels, and appear small and rough in-game. The version of GNU Unifont used is 9.0.04[1], and is outdated as of 1.17.1. It provides the support for the CJK characters as well as a fallback for every character not provided by any loaded font.