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TimerHub

35 Second Timer

Free online 35 second countdown timer with alarm

Set a 35 second timer for a work interval, a plank hold, or a rest period that needs to be longer than half a minute.

35s timer35 sec timertimer 35 secondsset a timer for 35 seconds
00:35
Alarm on

Space start/pause · R reset · +− adjust

Floating Picture-in-Picture needs a Chromium browser; this one doesn't support it.

Background sound

Off

Quick Timers

1m90s3m5m10m15m30m45m1h4h

More ways to run this timer

Run it with rain, waves or a focus pad →Same countdown, with an ambient bed that fades out at zero. No video, no ads.Need a visual countdown instead? →Sand, candle, rocket, traffic light and seven more — built for projectors and classrooms.

Proven Timer Pages

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Build repeating work and rest rounds in the Interval Timer →

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Embed this timer

Paste this into any page — a class blog, a lesson plan, a meeting agenda — and visitors get a working 35 second timer with no script tag, no account and no tracking. Please keep the credit link.

About the 35 Second Timer

A 35 second countdown with a display large enough to read across a room, keyboard shortcuts, and an alarm at zero. Built for intervals, rest periods and game rounds — no ads, no signup.

TimerHub calculates remaining time from an absolute finish timestamp, so missed browser callbacks do not create drift. Read the timing accuracy methodology and reproducible tests.

Common Uses

  • HIIT work interval
  • Plank hold
  • Rest between sets
  • Speed challenge
  • Game round countdown

How to Use the 35 Second Timer

  • Click Start (or press Space) to begin your 35 second countdown
  • Press Space again to pause and resume, or R to reset the timer
  • Use the +/- buttons to adjust by 10 seconds while running
  • Toggle Repeat to loop the countdown automatically, and watch the finish time under the display
  • Use the Fullscreen control below the timer for a large full-screen countdown (Esc to exit)
  • Pick a background sound — rain, ocean, fireplace or brown noise — that fades out at zero
  • Choose or mute the alarm sound from the sound settings in the header
  • Add ?autostart=1 to the link to start the countdown on load
  • Enable notifications for alerts when your 35 second timer finishes, even in a background tab

Frequently Asked Questions

How long is 35 seconds?▾

35 seconds is less than a minute. Our free 35-second timer gives you a precise countdown with an alarm at the end.

What can I use a 35 second timer for?▾

A 35 second timer is perfect for hiit work interval, plank hold, rest between sets. Hit Start and the countdown begins instantly.

Does the timer work in the background?▾

Yes, our timer continues running even if you switch to another tab or minimize your browser. Enable notifications to get alerted when it finishes.

Does the alarm sound when the timer finishes?▾

Yes, an alarm plays automatically the instant the 35 second countdown hits zero, with an optional vibration on mobile. Enable notifications for an extra alert in background tabs.

Can I make the timer fullscreen?▾

Yes, use the Fullscreen control below the timer to show a large full-screen countdown that is easy to see across a room or gym. Press Esc to exit fullscreen.

Can I use this 35 second timer on mobile?▾

Yes, our 35 second timer works on all devices including phones and tablets. No app download needed — just open this page in your mobile browser.