clockfresh

Find the right time tool

Search by task, such as study, workout, meeting, sleep or date.

21 tools

Reliability Guide

What browser timers and alarms can do, and what they cannot promise.

No adsNo sign-upOffline after cacheLocal-only Privacy
How a browser alert reaches you Browser timing depends on an open tab or installed web app and the device permissions around it.
  1. Open the page
  2. Test sound and permissions
  3. Keep the tab or app open
  4. Use a device alarm for critical events

What Clockfresh does for accuracy

Timers and alarms are based on target timestamps, not accumulated interval ticks. If a browser throttles background JavaScript, the display catches up from the real clock when it runs again.

What still depends on the browser

  • Audio needs a user gesture before the browser allows sound.
  • Selected timer and alarm sounds repeat until dismissed by default; the per-tool Repeat setting can limit them to one or three plays.
  • Notifications require permission and device/browser support.
  • Wake lock support varies by browser, battery mode and operating system.
  • Closing the tab or quitting the browser stops page JavaScript.
  • Offline support depends on the route being cached before the connection drops.

Best setup for important alarms

  1. Start the alarm from the device you will keep nearby.
  2. Allow sound and notifications when prompted.
  3. Keep the tab or installed web app open.
  4. Use a native device alarm as backup for critical wake-ups.

Related tools

Alarm clock Timer PWA device QA Dashboard

Questions

Will an online alarm work if I close the tab?
No. A browser alarm needs the page or installed web app to stay available. Closing the tab stops page JavaScript.
Why do I need to press start before sound works?
Browsers block autoplay. Clockfresh unlocks audio from your explicit start or set-alarm gesture.
How long do timer and alarm sounds play?
The alarm and timer ring until you dismiss them with the visible stop/reset/snooze control; other tools play a few rings by default. Every tool has a Repeat setting — once, 3 times, or until stopped — remembered in this browser.
Does offline mode mean every page works forever?
No. The service worker caches the app shell and selected routes. Production device testing still matters.
Does wake lock work everywhere?
No. Wake lock support varies by browser and device. Clockfresh requests it where available and keeps timing based on absolute clock time.

What was checked

5 September 2026: automated interface checks in the Codex browser on macOS; responsive layout checks in headless Chrome at 390 px.

  • A running five-minute timer restored on a ten-minute page with its duration and status explained. Pause and the explicit page-preset action synchronized across two tabs.
  • The sleep calculator initially showed 9 h and 7 h 30 min; shorter comparisons appeared only after selection, with a duration warning.

Scope: visible controls and calculated results. Audible sound, notifications, locked-screen delivery, installed apps and real phones were not verified by this check.