Screens & timers
Choose color screens, display checks, clocks, timers or generated noise. Keep the relevant tab open and test sound and full-screen support on your device before relying on them.
Tools in this category
8 tools-
Color screen
Pick any color and fill the whole screen, with brightness and an optional clock. -
Dead pixel test
Full-screen colors and patterns that make a dead or stuck pixel easy to see. -
Online clock
The current time in any time zone, big enough to read across the room. -
Online notepad
Write, autosave and download plain text notes without an account. -
Online timer
Set any countdown, hear an alarm, and run it fullscreen. -
Pomodoro timer
Focus for 25 minutes, break for 5, and a long break after every fourth session. -
Stopwatch
Start with Space, record laps with L, export every split as CSV. -
White noise generator
White, pink and brown noise with a sleep timer and a gentle fade-out.
Use a color screen to inspect a display, a stopwatch to record laps or a countdown to follow a short activity. The clock supports time zone selection, while Pomodoro alternates work and rest periods. White, pink and brown noise are generated in the browser after you start playback. Full-screen controls are available where supported, but behavior differs between tools and devices. The countdown can request a screen wake lock; the browser may reject or release it. Hidden tabs can be throttled or suspended, and closing the tab stops the tool. A tab-title countdown is not a background notification service. Test the sound with the tab visible and keep it open for an important alarm. Do not use a browser timer as a substitute for a reliable device alarm.
Common questions
Does wake lock guarantee that my phone stays awake?
No. The countdown requests a screen wake lock where supported, but visibility, power saving and browser policies can prevent or release it. It cannot guarantee an alarm on a locked or sleeping phone. Keep the tab visible and test your device.
Will a timer ring after I close or leave the tab?
Closing the tab stops the tool. Switching tabs may let the countdown continue, but the browser can suspend processing or audio. The title can show remaining time while running; it is not a guaranteed notification. For reliable reminders, use a device alarm.