Countdown Timer
Run a simple countdown timer.
Result—
Enter values above.
Browser timers may be throttled when a tab is inactive; do not use this as a safety-critical timer.
Run a simple countdown timer.
Continue with a related tool.
Content reviewed: 24 September 2026
Run a simple countdown timer. Use the controls above to enter the values or text required by this specific tool, then review the result together with the method and limitations shown on the page.
A one-minute timer starts at 01:00 and counts down to 00:00.
Browser timers may be throttled when a tab is inactive; do not use this as a safety-critical timer.
For information about calculation checks, browser-side processing and external services, see Methodology & Accuracy.