20-20-20 Eye Strain Timer
Protect your eyes from screen strain. Work for 20 minutes, then the timer reminds you to look at something 20 feet away for 20 seconds. Timing is based on real clock timestamps, so it stays accurate even when the tab runs slow.
Work session
20:00
Look at the screen and work. When the timer ends, rest your eyes for 20 seconds.
Cycles done
0
Breaks today
0
Status
Idle
Counts are kept in memory for this visit only and reset when you reload the page.
How to use
- Press Start. The 20-minute work countdown begins and the timing is based on real clock timestamps.
- When 20 minutes pass, you hear a beep (if enabled) and a full-screen overlay counts down 20 seconds — look at something 20 feet away.
- Not ready for the break? Press "Snooze 5 minutes" on the overlay to delay it.
- After the break, the next 20-minute cycle starts automatically. Press Reset any time to go back to Idle.
Frequently asked questions
Every 20 minutes, look at something 20 feet away for 20 seconds. This timer automates the rule with a work countdown, a break overlay and a sound alert.
A full-screen overlay shows a 20-second countdown and asks you to look at something 20 feet away. You can snooze the break for 5 minutes if you are not ready.
Yes. The timer is based on clock timestamps, not on counting interval ticks, so it stays accurate even if the tab is slow.
No. Completed breaks are counted in memory for this page visit only and reset when you reload the page.
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Rest your eyes
Look at something about 20 feet away.
Blink slowly and relax your eyes.
20