Quick answers about the online clock, timer, and alarm.
Yes. The online clock, timer, and alarm features are free to use in your browser. Ads may appear to support hosting.
No. VClock runs in modern browsers on desktop and mobile. Keep the tab open for timers and alarms to fire reliably.
The displayed time follows your device clock and timezone settings. For certification-grade timing, use dedicated calibrated hardware.
Usually no. Browser alarms require the page to remain available. Leave the tab open and unmuted if you rely on an audible alert.
Use separate browser tabs or windows if you need parallel countdowns. Refreshing a tab may reset ephemeral timer state.
Timer values typically stay in the browser session. See the Privacy Policy for logs and advertising cookies.
Background tab throttling in browsers can delay timers. Keep the tab visible for best results during critical countdowns.
Mobile operating systems suspend background tabs. For wake-up alarms, prefer your phone native Clock app; use VClock for active on-screen sessions.
The clock uses your system timezone. Change the OS timezone to display another region local time.
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