Everything runs client-side
'Online spinner wheel' searches usually turn up tools that still ask you to wait for ad networks to load, approve cookie banners, and sometimes install a browser extension before the wheel even appears. Spinzelvo is built the opposite way: the wheel, the entry list, the animation, and the sound effects are all handled by the browser itself with plain JavaScript and the Canvas API — nothing to install, nothing server-side to wait on.
Because there's no server round-trip involved in spinning, results appear instantly and the tool works even on a slow connection, once the page itself has loaded. It also means your entry list never leaves your device — nothing is uploaded or stored on a server.