Create a room on YouTube Music, send the link, and everyone hears the same song at the same second, wherever they are. Play, pause, skip and seek stay in sync for the whole room, and friends add songs to one shared queue. No account, no sign-up: install the free extension for Chrome or Edge and you're in. Sync is server-timestamped with clock-offset correction, so rooms don't slowly drift apart. Available in 14 languages.