Unlike English web fonts, Korean web fonts are notoriously heavy because they need to contain anywhere from 2,350 to 11,172 characters. Even with aggressive compression (like WOFF2 Subsets), they can heavily impact performance, causing text rendering delays (FOIT) or layout shifts (CLS) on slower networks.

Inspired by modernfontstacks.com, I realized that we can build beautiful, blazing-fast web pages by smartly combining the pre-installed system fonts of major OS environments (Windows, Mac, iOS, Android) without downloading any external files.

Here is my curated list of Korean font stacks tailored for different design styles.

1. System UI (Standard Sans-Serif)

These are default sans-serif fonts optimized by each OS for maximum screen readability. Since no font files are downloaded, pages load instantly with zero FOIT.