Wellness & Accessibility · Free Tool
Countdown Timer & Stopwatch
A precise, drift-corrected countdown timer and stopwatch with laps, presets, and a gentle chime when time's up. Runs entirely in your browser — no sign-in, no tracking.
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How it works
Naive timers built on setInterval drift — the browser never fires them exactly on schedule. This one reads a performance.now() timestamp on every animation frame and re-derives the remaining time from real elapsed time, so it stays accurate even in a backgrounded tab. Want to build one? Read the step-by-step guide.