tl;dr: Lofi Cities is a free browser-based web app that pairs looping 480×270 pixel-art scenes of 16 cities (Paris, Tokyo, NYC, etc.) with endless lofi music generated live via the Web Audio API—no samples, accounts, or installs. Users can switch cities, change weather, pick musical styles (jazzhop, ambient, bossa, etc.), use Pomodoro/sleep timers, and chat with others listening. It works offline, on mobile, and supports OBS integration for streamers.