An open-source module that implements a base-72 encoding system using pure Korean characters, inspired by Base 32 which combines English letters and numbers.

A lightweight 2kb library for safely calculating arbitrary-precision large integers and decimals.

A deterministic pseudo-random shuffle library that creates shuffled-looking indices without actually shuffling.

A unified SubtleCrypto utility that works across Node.js, browsers, and Cloudflare Workers without external dependencies.

Efficiently computes (x, y) ↔ n mapping for spiral enumeration filling circles with points from center outward.

A JavaScript obfuscator that transforms code into spell-like obfuscated syntax.

Created an open-source browser based on the Chromium engine. It's a secondary browser concept that stays always on top without replacing the main browser, and completed beta release with Electron. Implemented encrypted content streaming playback for Netflix/Disney+/Prime Video based on Widevine DRM.