Time tools with their limits in view
Check your device’s local time, set a time-of-day alarm, run independent countdowns, or record elapsed readings and laps. The tabs above keep all four tools on this page. For a focused workspace and a detailed guide, open the Alarm, Timer, or Stopwatch page.
Choose by the question you need answered
- “Remind me at 3:15 PM.” Use an alarm. Check AM/PM and your device’s time zone before setting it.
- “Let this run for eight minutes.” Use a countdown. Give each timer a name when several tasks are in progress.
- “How long did that take?” Use the stopwatch. Lap stores the cumulative reading at a checkpoint without stopping the run.
What a browser can—and cannot—do
XClock is a page running on your device, not an operating-system alarm service. Keep the relevant page open and the device awake. A closed browser cannot run its alerts. Sleeping devices and suspended tabs can delay or silence them. Test sound before use and keep a separate backup for an alert you cannot afford to miss.
Saved tools belong to this browser and origin. They do not sync to an account. Read what XClock saves and what refresh changes before relying on a restored countdown.
Practical browser-timekeeping resources
- Will a browser alarm still ring? Understand page closure, sleep, background tabs and next-day scheduling.
- What the timing display means Separate clock readings, callback-driven countdowns and stopwatch precision.
- Troubleshoot a silent alert or missing timer Follow a short diagnosis instead of repeatedly changing the time.
- XClock testing and known limitations See the environments and behaviors actually checked.
The resource library groups technical explanations, practical exercises and timekeeping background. No account or installation is required to use the tools.