The classic sliding-tile puzzle, free and private. Swipe (or use the arrow keys) to push every tile in one direction; when two tiles with the same number touch, they merge into one worth double. Keep combining 2s into 4s, 4s into 8s, all the way to the 2048 tile — then keep going to chase your best score. Your high score is saved on your device and nothing is ever uploaded. Runs entirely in your browser, works offline, no signup, no ads, no paywall.
On Mac, Windows, Linux or any computer: just click "Open 2048" above — it runs right in your browser, no install needed. To keep it like a desktop app, click the install icon (⊕) at the right of Chrome or Edge's address bar, or use Safari's File → "Add to Dock" on a Mac.
On iPhone or iPad: open it in Safari, tap the Share button, then "Add to Home Screen." It behaves like a native app — full-screen, offline-capable, launches from your home screen.