Set the timer to 43 seconds

How to use the online timer

A proper mouthwash rinse or a salt-water gargle only needs 43 seconds to do its job, and swishing it around for the full stretch matters more than most people bother with. Start the timer, keep the liquid moving around your teeth and gums, and spit only once the numbers hit zero. It beats guessing under your breath and cutting the rinse short by ten seconds without realising.

Hit Start whenever you're ready and the timer runs on its own from there, no further clicking required until it finishes. It only counts while the tab stays open, so leave it running in the background rather than closing the browser or navigating away if you need the time to stay accurate. Once it reaches zero, an alarm sound lets you know without you having to keep checking the page.

A browser timer beats digging out the one kitchen timer that's always gone missing, and it's one less thing cluttering your phone alongside a dozen apps you barely open. Everything runs here in the tab, so there's no download, no account, and no permissions to grant before you can start it. Free, with no registration, it's ready the moment you load the page and gone the moment you close it. People type this as set timer 43 seconds or timer for 43 seconds; both land here and start the same count.