About OneTapTimer

OneTapTimer exists for one simple reason: needing a timer should never be harder than the thing you’re timing. No app installs, no account creation, no fourteen-step onboarding — just open the page and start counting.

We built five focused tools — a countdown timer, a stopwatch, a date countdown, an interval timer, and an alarm clock — and kept every one of them fast, quiet, and free. The interface is deliberately calm: near-white and near-black with a single teal accent, large tabular digits that never jitter as they tick, and a dark mode that follows your system preference.

Every tool runs entirely in your browser using JavaScript. Countdowns and stopwatches are anchored to your device’s system clock rather than counting ticks, so they stay accurate even if the browser tab is throttled in the background. Sounds — the finish chime, interval cues, and alarm ringing — are generated on the fly with the Web Audio API, so there are no audio files to download.

The site itself is a statically generated site, which is why it loads almost instantly even on slow connections. The only JavaScript you download is the small tool you’re actually using.