Online Timer Stopwatch Countdown Pomodoro

Online Timer

Run a countdown timer without logging in. Set duration, start, and get alerted. No account, no app - works instantly.

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Step-by-Step Guide

Timer

Set countdown alarms, intervals, and loop durations with sound notifications directly inside your browser.

1
Set Duration

Select the desired countdown time in hours, minutes, and seconds using the quick presets or manual inputs.

Timer Presets Hours/Mins/Secs inputs
2
Choose Sound Alert

Pick your preferred notification ringtone (Chime, Beep, Bell, Digital) and adjust the volume.

Ringtone Selection Volume slider Mute Toggle
3
Run Countdown Loop

Click Start to trigger the countdown. Manage pause, resume, or lap interrupts dynamically as the timer runs.

Start/Pause Action Reset Button Active progress ring
4
Alarm Triggered

The timer triggers a visual flash and plays your chosen sound alert. Stop or dismiss the alert instantly.

Audio alert loop Alarm dismiss
Client-side processing
Auto-deleted after session
Zero server uploads
Clock Utility

Background-persistent client countdown timer

Run offline countdown alerts with audio signals and loop settings entirely inside your web browser.

Background Keep-Alive

Uses Web Workers to prevent the timer from throttling or pausing when the browser tab is minimized.

Offline Sound Alerts

Generates audio alerts locally using synthesized Web Audio API tones so no external audio files are loaded.

Interval Loops

Configure standard countdown intervals or repeating cycle counts for study and work schedules.

Zero Tracking

Operates completely offline. Your set times, alarms, and notifications are processed entirely in browser memory.

Trigger audio ringtones and browser notification alerts
Keep timer active in background tabs with Web Workers
100% sandboxed script runs completely offline
FAQ

Common Questions

Frequently asked questions regarding timer loops, background execution, browser audio policies, and offline access.

Will the timer still go off if my browser tab is minimized or in the background?
Yes. The timer utilizes background scripts (Web Workers) which bypass normal browser tab throttling, ensuring the countdown remains precise and the alarm triggers on time.
Why isn't the alarm sound playing when the timer reaches zero?
Modern browsers require a user interaction (like clicking a button) before playing audio. Make sure you have interacted with the page at least once before starting the timer.
Can I run multiple timers at the same time?
Currently, this tool is designed for a single high-precision countdown. For multiple alarms, you can open additional tabs of this tool.
How does the "Interval Loop" feature work?
The loop feature automatically resets and restarts the countdown once it reaches zero, useful for repeating workout intervals or cooking schedules.
Are my timer schedules sent to any servers?
No. The timer operates entirely client-side. No alarm durations, notification alerts, or configurations are uploaded or tracked.