20-20-20 timer: a free eye break reminder
The 20-20-20 rule says: every 20 minutes of screen time, look at something about 20 feet (6 metres) away for at least 20 seconds. This free timer counts down 20 minutes, plays a sound, then guides a 20-second distance-gaze break and starts over. Keep the tab open while you work.
20-20-20 eye timer
Every few minutes, look 20 feet away.
Desktop alerts aren’t supported here. You’ll still get a sound and a flashing tab.
What you get
Runs in your browser
No download or account.
Sound + countdown
A chime when it is time, then a 20-second guided break.
Recommended by eye doctors
The American Academy of Ophthalmology recommends the 20-20-20 rule for digital eye strain.
Automatic repeat
The next 20-minute cycle starts on its own.
How to set it up
- Press Start.
- Work as usual — the timer counts down 20 minutes.
- When it chimes, look at something about 20 feet away for 20 seconds.
- The next cycle starts automatically.
Frequently asked questions
Does the 20-20-20 rule actually work?
It is widely recommended by eye-care professionals as a simple way to reduce digital eye strain. Research on it is limited, but taking regular screen breaks is low-cost and low-risk.
What if I can’t see 20 feet away?
Look out of a window or down a corridor. Being exact isn’t the point — relaxing close focus is.