Offline Tic Tac Toe

Lost internet? Time for some Tic Tac Toe! A quick game that opens when you go offline, and works entirely without a connection.

Lost internet? Time for some Tic Tac Toe! Offline Tic Tac Toe automatically opens a clean, distraction-free game tab when Chrome goes offline — and is always one click away from your toolbar popup, online or offline. FEATURES • Automatic offline launch: Detects when your connection drops and opens (or focuses) a game tab. Can be toggled off anytime in the popup. • Two AI difficulty modes: - Unbeatable: Powered by Minimax with alpha-beta pruning — you can draw, you can't win. - Casual: Mixes strong play with occasional openings so you have a fair chance to win. • Play as X or O: Go first as X, or play as O and let the computer open. • Instant toolbar play & full-tab mode: Start in the popup or expand into a full browser tab with live sync between both. • Non-intrusive reconnect notice: Reconnecting never interrupts an active game; a dismissible "You're back online." banner appears instead. • Accessible & responsive: Full keyboard play (Arrow keys, Home/End, Enter/Space), screen-reader live regions, automatic light/dark mode, and reduced-motion support. • Local progress: Remembers your active board, preferences, and game/win/draw stats (with a Reset button) across sessions. 100% PRIVATE & OFFLINE • No servers, no CDNs, no ads, no analytics, and no tracking. • Strict Content Security Policy (connect-src 'none') blocks all external network connections. • Everything runs locally on your device. Support the developer: https://buymeacoffee.com/mailmeprast