Timer

A versatile countdown and count-up timer with multiple simultaneous timers, preset durations, custom time input, and an audible alarm. Everything runs locally in your browser.

Features

• Countdown & Count-up — switch between modes; count-up starts from zero
• Multiple timers — run several timers simultaneously, each with its own label
• Preset durations — quick buttons for 1, 5, 10, 30, 60 minutes
• Custom time — input hours, minutes, seconds manually
• Audible alarm — Web Audio API beep when countdown reaches zero (no external files)
• Keyboard shortcuts — control the active timer without the mouse
• No persistence — timers reset on page reload (by design)

Keyboard Shortcuts (Active Timer)

How It Works

Each timer runs on its own requestAnimationFrame loop using performance.now() for drift-free accuracy. Countdown timers trigger a short sine-wave beep via the Web Audio API when reaching zero. The alarm auto-stops after 3 seconds or when any timer control is pressed.

Timers can be labeled (e.g., "Pasta", "Eggs") to distinguish multiple running timers. Finished countdown timers stay visible with a "Done" badge until reset.

Use Cases

• Cooking multiple dishes with different cook times
• Pomodoro sessions (25/5 min) with labeled work/break timers
• Interval training — work/rest cycles
• Presentations or meetings with time limits
• Any situation needing multiple concurrent countdowns

Related Tools

• Stopwatch — precise elapsed time with lap tracking
• Unix Time — convert between timestamps and human-readable dates
• Date Difference — calculate exact span between two dates