Stopwatch & Timer puts the two everyday clocks in one place: a stopwatch with lap times for measuring how long things take, and a countdown timer that sounds when time runs out. Sports practice, cooking, study sessions, presentations — one tool covers both directions of time.
What are lap times for?
A lap records the time at a moment without stopping the watch — so a runner sees each round's time AND the total, or you can time each stage of a task separately while the overall clock keeps running.
Will the timer still alert if I switch to another tab?
Keep the page open in its tab; browsers can slow timers in hidden tabs on some devices, so for critical timing (an exam practice, a cake) keep the tab visible or the screen on.
Do I need to sign up or install anything?
No. The Stopwatch & Timer is completely free, needs no account and nothing to install — it runs in your browser, and anything you type stays on your device.