Timers & Clocks
20 minute timer
Twenty minutes: the 20-20-20 screen-break rule, a quiz, or a nap that stays a nap.
20:00
Presets
- Runs in your browser
- No account required
- Free to use
What a 20 minute timer is good for
The 20-20-20 rule
Every twenty minutes, look at something twenty feet away for twenty seconds. Turn on repeat and let it remind you.
Reading time
A daily twenty minutes of reading is a common school and habit target.
Timed quizzes
A natural length for a short in-class test.
Tip: Repeat mode turns this into a recurring eye-break reminder for the whole workday.
Questions
Does repeat drift over a day?
No. Each cycle starts at the exact moment the previous one ended, so after eight hours the reminders are still on the twenty-minute mark.
Does the 20 minute timer keep going in a background tab?
Yes. It measures elapsed time against your device clock rather than counting ticks, so browser throttling in a background tab cannot slow it down. Keep the tab open for the alarm to sound.
Who builds these
Free tools by day. Websites that earn their keep by trade.
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