30 Minute Timer Online
A free 30-minute countdown timer with automatic eye break reminders for longer focus sessions.
About this timer: 30 Minute Timer Online
Is 30 minutes too long without an eye break?
Eye care professionals recommend following the 20-20-20 rule — a break every 20 minutes. Thirty minutes pushes slightly past that guideline, but some people find longer blocks more productive. If you're prone to eye strain, consider the 20-minute or 25-minute timer instead. If 30 minutes works for your flow, the eye break at the end is even more important.
What's this timer best for?
Extended focus work like writing, research, design sprints, deep reading, or any task where interruptions every 20 minutes would break your flow. It's a compromise between the 20-20-20 rule and longer deep work sessions.
Can I get a mid-session reminder?
Currently the timer alerts at the end of the full duration. For mid-session eye break reminders, use the 15-minute timer and run two consecutive sessions instead — you'll get an eye break at the halfway point.
Will the timer work in the background?
Yes. You can switch to another tab or app and the timer keeps running. When the work session ends, you'll get a browser notification (if enabled) and a sound alert to take your eye break.