24h Timer / Screen Awake Tool
Run a clean long-duration timer with fullscreen mode and optional wake lock to reduce screen sleep interruptions.
Wake lock not requested.
Timer
00:00:00
Displays hours, minutes, and seconds for long sessions.
Important note
Wake Lock API support depends on browser and device. Power saving settings may still override screen wake behaviour on some systems.
FAQ
Can this run longer than 24 hours?
Yes. The timer continues to count beyond 24 hours.
Why did my screen dim anyway?
OS-level battery policies or browser restrictions can still force dimming or sleep.
Online timer for focus and monitoring
This timer is useful for study blocks, timed troubleshooting, and long-running checks where you need a clear low-distraction display.
Related tools: Internet Speed Test, Trackpad Tester, Keyboard Tester.