21 Second Timer to set the alarm in 21 Second from now. Click the “Start” button to start the countdown. It’s will play the alert sound when the timer ends. If you don’t want an alert sound, you can disable it by clicking the sound icon.
Also, you can reset the timer at any time with the “Reset” button and pause the timer by clicking the “Pause” button. Click the full-screen icon in the top-right corner to display the timer in Fullscreen mode.
Why use this 21 Second Timer?
If you are here, you probably need something to accomplish within 21 Second. The benefit of the timer is to alert you when 21 Second has passed.
How to know when the timer ends?
After 21 Second, when the timer ends, the alert sound will play for 8 seconds to alert you. You can disable the alert sound by clicking the sound icon in the top-right corner.
What devices are compatible with this 21 Second Timer?
You can use any device with browser installed on it. Smartphones, tablets, laptops, Mac, PC, and Smart-TV are compatible with this timer.