20-20-20 Eye Rule Timer — Free Online Tool
Every 20 min, look 20 ft / 6 m away for 20 sec — for screen workers
Free 20-20-20 eye strain timer. Every 20 minutes of screen work, prompts you to look at something 20 ft / 6 m away for 20 seconds. Optional browser notifications.
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20-20-20 Eye Rule Timer
The 20-20-20 rule is the most widely recommended habit for reducing digital eye strain (computer vision syndrome). Every 20 minutes of close screen work, look at something at least 20 feet (about 6 meters) away for 20 seconds. This relaxes the ciliary muscle inside your eye — the muscle that pulls your lens into close-focus shape all day. Multiple studies show regular 20-20-20 practice reduces dry-eye symptoms, headaches, and asthenopia.
How the visualization works
The big ring fills clockwise over the 20-minute work period. The page title also shows the countdown so you can leave the tab in the background and keep working. When work ends, the icon flips to a tree and a 20-second break begins — look far. If you grant browser-notification permission, you'll get a desktop alert at the start of each break, so you don't have to keep the tab visible.
How to use this tool
- 1
Start the timer
Press start when you begin screen work. The big ring fills as 20 minutes pass.
- 2
Work for 20 minutes
Keep working normally. The page title shows the countdown so you can leave this tab in the background.
- 3
When the alert fires
The icon flips to a tree and a 20-second break begins. Look at something at least 20 ft (6 m) away — out a window, across the room, anywhere distant.
- 4
Hold the gaze 20s
Don't check your phone or another screen. Just look far. Your ciliary muscle (focus muscle) relaxes.
- 5
Repeat all day
The cycle auto-restarts. Most screen workers should do 15–25 cycles in an 8-hour day.
Frequently Asked Questions
What is the 20-20-20 rule?
Does it really help?
Why 20 feet specifically?
Can I get a notification when the break starts?
Does this tool store my data?
Key Takeaways
- 20-20-20 Eye Rule Timer is a free, browser-based calculator tool — every 20 min, look 20 ft / 6 m away for 20 sec — for screen workers.
- No signup, no downloads, no file uploads — your data stays on your device.
- Works on desktop, tablet, and mobile. Install as a PWA for offline access.
How to Use 20-20-20 Eye Rule Timer
- Open the tool: Launch 20-20-20 Eye Rule Timer on Toololis — no account or download needed.
- Enter your data: Paste text, enter values, or select a file directly in your browser.
- Get instant results: Everything is processed locally — results appear immediately.
- Copy or download: Save your output or share it. Bookmark for quick access next time.
20-20-20 Eye Rule Timer — Quick Facts
- Price
- Free — no limits, no watermarks, no paywalls
- Privacy
- 100% browser-based — no data is sent to any server
- Platform
- Any modern browser on desktop, tablet, or mobile
- Category
- Calculator Tools on Toololis
- Offline
- Works offline after first visit (Progressive Web App)
| Feature | Details |
|---|---|
| Tool | 20-20-20 Eye Rule Timer |
| Category | Calculator |
| Signup Required | No |
| File Upload | None — processed in browser |
| Mobile Support | Fully responsive |
| Cost | Free forever |
Why Use 20-20-20 Eye Rule Timer?
You should try 20-20-20 Eye Rule Timer for a quick, private way to every 20 min, look 20 ft / 6 m away for 20 sec — for screen workers. All processing happens in your browser. Your files and data never leave your device. According to web.dev, client-side processing is the gold standard for privacy.
On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.