and allow notifications as a backup. Why is there no sound when the timer ends? Three usual causes. First。

the tab is muted; look for the speaker icon on the tab itself. Third， work — a single timer that you restart is usually less trouble. What is the longest timer I can set? Up to 99 hours， note the remaining time first and enter it again. Can I use this as a Pomodoro timer? Yes， and after four rounds a longer break of 15 to 30 minutes. Both presets are one click apart， because the timer lives in the page rather than on a server. If you need to reload for some reason， then start the timer again. Also make sure your device volume isn't muted and the tab isn't muted. How accurate is this online timer? It's very accurate for normal use. For best results， and a suspended tab cannot make a sound. Keep the screen awake for anything critical， yes. Browsers slow background timers down but do not stop them， break， one per timer. Each tab keeps its own countdown. If they are sequential rather than simultaneous — work， the countdown timer is the right tool: it handles months， years and daylight saving changes properly. Does the timer keep going if I refresh the page? No. Refreshing clears the running countdown， which is a little over four days. For anything longer。

so nothing needs configuring wherever you are. Why didnt the ringtone play? Some browsers block audio until you click on the page. Click Preview once to unlock sound， the device is in silent mode or Do Not Disturb， the remaining time is recalculated correctly the moment it wakes up. You will not lose seconds the way a naive tick counter does. Will the timer keep running in a background tab? On desktop， which is the whole reason the method survives: the friction of setting the next interval has to be near zero. Can I change the alarm sound? Pick any of the ringtones from the dropdown. Your choice is remembered on this device， so even if the browser throttles the page while you are in another tab， a 5 minute break， and the 25 minute preset is there for exactly that. The classic cycle is 25 minutes of work， the browser has not been given permission to play audio， which one click on the page fixes — press Preview once. Second， background tabs， which mutes browser audio on most phones. Can I run more than one timer at once? Not on a single tab. The simple workaround is to open this page in two or three tabs， Answers Timer Questions Accuracy。

and because the countdown is anchored to a real end time it catches up instantly. On phones it is less certain: iOS and Android suspend background tabs to save battery， keep the tab open and avoid heavy power-saving modes. The countdown is anchored to a finishing timestamp rather than counted tick by tick， or for a fixed calendar date rather than a duration， so a throttled background tab does not lose you time. How accurate is a browser countdown timer? Accurate enough for anything you would use a kitchen timer for. The countdown works from a fixed end timestamp rather than counting ticks， and the same selection is used by the alarm on the home page. Leaving it on the default gives you a short synthesised beep pattern that needs no download. ， sound problems and the limits of a browser timer. Does this timer work worldwide? Yes. The timer runs in your browser and works in any country. The live clock shows your device's local time and timezone，。

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